4.19.162-rc1 review

This is the start of the stable review cycle for the 4.19.162 release. There are 32 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know.

Responses should be made by Tue, 08 Dec 2020 11:15:42 +0000. Anything received after that time might be too late.

The whole patch series can be found in one patch at:

	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.162-rc1.gz

or in the git tree and branch at:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
and the diffstat can be found below.

thanks,

greg k-h

-------------
Pseudo-Shortlog of commits:

Greg Kroah-Hartman <[email protected]>

    Linux 4.19.162-rc1

Shiraz Saleem <[email protected]>
RDMA/i40iw: Address an mmap handler exploit in i40iw

Vasily Averin <[email protected]>
tracing: Remove WARN_ON in start_thread()

Po-Hsu Lin <[email protected]>
Input: i8042 - add ByteSpeed touchpad to noloop table

Sanjay Govind <[email protected]>
Input: xpad - support Ardwiino Controllers

Hector Martin <[email protected]>
ALSA: usb-audio: US16x08: fix value count for level meters

Krzysztof Kozlowski <[email protected]>
dt-bindings: net: correct interrupt flags in examples

Vinay Kumar Yadav <[email protected]>
chelsio/chtls: fix panic during unload reload chtls

Eran Ben Elisha <[email protected]>
net/mlx5: Fix wrong address reclaim when command interface is down

Wang Hai <[email protected]>
net: mvpp2: Fix error return code in mvpp2_open()

Dan Carpenter <[email protected]>
chelsio/chtls: fix a double free in chtls_setkey()

Zhang Changzhong <[email protected]>
net: pasemi: fix error return code in pasemi_mac_open()

Zhang Changzhong <[email protected]>
cxgb3: fix error return code in t3_sge_alloc_qset()

Dan Carpenter <[email protected]>
net/x25: prevent a couple of overflows

Antoine Tenart <[email protected]>

    net: ip6_gre: set dev->hard_header_len when using header_ops

Eric Dumazet <[email protected]>
geneve: pull IP header before ECN decapsulation

Thomas Falcon <[email protected]>
ibmvnic: Fix TX completion error handling

Thomas Falcon <[email protected]>
ibmvnic: Ensure that SCRQ entry reads are correctly ordered

Guillaume Nault <[email protected]>
ipv4: Fix tos mask in inet_rtm_getroute()

Antoine Tenart <[email protected]>

    netfilter: bridge: reset skb->pkt_type after NF_INET_POST_ROUTING traversal

Jamie Iles <[email protected]>
bonding: wait for sysfs kobject destruction before freeing struct slave

Sylwester Dziedziuch <[email protected]>
i40e: Fix removing driver while bare-metal VFs pass traffic

Lijun Pan <[email protected]>
ibmvnic: notify peers when failover and migration happen

Lijun Pan <[email protected]>
ibmvnic: fix call_netdevice_notifiers in do_reset

Maxim Mikityanskiy <[email protected]>
net/tls: Protect from calling tls_dev_del for TLS RX twice

Yves-Alexis Perez <[email protected]>
usbnet: ipheth: fix connectivity with iOS 14

Jens Axboe <[email protected]>
tun: honor IOCB_NOWAIT flag

Alexander Duyck <[email protected]>
tcp: Set INET_ECN_xmit configuration in tcp_reinit_congestion_control

Willem de Bruijn <[email protected]>
sock: set sk_err to ee_errno on dequeue from errq

Anmol Karn <[email protected]>
rose: Fix Null pointer dereference in rose_send_frame()

Vadim Fedorenko <[email protected]>
net/tls: missing received data after fast remote close

Julian Wiedmann <[email protected]>
net/af_iucv: set correct sk_protocol for child sockets

Wang Hai <[email protected]>
ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init

-------------

Diffstat:

 .../devicetree/bindings/net/nfc/nxp-nci.txt        |  2 +-
 .../devicetree/bindings/net/nfc/pn544.txt          |  2 +-
 Makefile                                           |  4 +-
 drivers/crypto/chelsio/chtls/chtls_cm.c            |  1 +
 drivers/crypto/chelsio/chtls/chtls_hw.c            |  1 +
 drivers/infiniband/hw/i40iw/i40iw_main.c           |  5 --
 drivers/infiniband/hw/i40iw/i40iw_verbs.c          | 36 +++----------
 drivers/input/joystick/xpad.c                      |  2 +
 drivers/input/serio/i8042-x86ia64io.h              |  4 ++
 drivers/net/bonding/bond_main.c                    | 61 +++++++++++++++-------
 drivers/net/bonding/bond_sysfs_slave.c             | 18 +------
 drivers/net/ethernet/chelsio/cxgb3/sge.c           |  1 +
 drivers/net/ethernet/ibm/ibmvnic.c                 | 32 ++++++++++--
 drivers/net/ethernet/intel/i40e/i40e.h             |  1 +
 drivers/net/ethernet/intel/i40e/i40e_main.c        | 22 +++++---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 26 +++++----
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c    |  1 +
 .../net/ethernet/mellanox/mlx5/core/pagealloc.c    | 21 +++++++-
 drivers/net/ethernet/pasemi/pasemi_mac.c           |  8 ++-
 drivers/net/geneve.c                               | 20 +++++--
 drivers/net/tun.c                                  | 14 +++--
 drivers/net/usb/ipheth.c                           |  2 +-
 include/net/bonding.h                              |  8 +++
 include/net/tls.h                                  |  6 +++
 kernel/trace/trace_hwlat.c                         |  2 +-
 net/bridge/br_netfilter_hooks.c                    |  7 ++-
 net/core/skbuff.c                                  |  2 +-
 net/ipv4/route.c                                   |  7 +--
 net/ipv4/tcp_cong.c                                |  5 ++
 net/ipv6/addrlabel.c                               | 26 +++++----
 net/ipv6/ip6_gre.c                                 | 16 ++++--
 net/iucv/af_iucv.c                                 |  4 +-
 net/rose/rose_loopback.c                           | 17 ++++--
 net/tls/tls_device.c                               |  5 +-
 net/tls/tls_sw.c                                   |  6 +++
 net/x25/af_x25.c                                   |  6 ++-
 sound/usb/mixer_us16x08.c                          |  2 +-
 37 files changed, 266 insertions(+), 137 deletions(-)

From: Wang Hai <[email protected]>

[ Upstream commit e255e11e66da8281e337e4e352956e8a4999fca4 ]

kmemleak report a memory leak as follows:

unreferenced object 0xffff8880059c6a00 (size 64):
comm "ip", pid 23696, jiffies 4296590183 (age 1755.384s) hex dump (first 32 bytes):

    20 01 00 10 00 00 00 00 00 00 00 00 00 00 00 00   ...............
    1c 00 00 00 00 00 00 00 00 00 00 00 07 00 00 00  ................
  backtrace:
    [<00000000aa4e7a87>] ip6addrlbl_add+0x90/0xbb0
    [<0000000070b8d7f1>] ip6addrlbl_net_init+0x109/0x170
    [<000000006a9ca9d4>] ops_init+0xa8/0x3c0
    [<000000002da57bf2>] setup_net+0x2de/0x7e0
    [<000000004e52d573>] copy_net_ns+0x27d/0x530
    [<00000000b07ae2b4>] create_new_namespaces+0x382/0xa30
    [<000000003b76d36f>] unshare_nsproxy_namespaces+0xa1/0x1d0
    [<0000000030653721>] ksys_unshare+0x3a4/0x780
    [<0000000007e82e40>] __x64_sys_unshare+0x2d/0x40
    [<0000000031a10c08>] do_syscall_64+0x33/0x40
    [<0000000099df30e7>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

We should free all rules when we catch an error in ip6addrlbl_net_init(). otherwise a memory leak will occur.

---
 net/ipv6/addrlabel.c |   26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

@@ -306,7 +306,9 @@ static int ip6addrlbl_del(struct net *ne
 /* add default label */
 static int __net_init ip6addrlbl_net_init(struct net *net)
 {
-	int err = 0;
+	struct ip6addrlbl_entry *p = NULL;
+	struct hlist_node *n;
+	int err;
 	int i;
 
 	ADDRLABEL(KERN_DEBUG "%s\n", __func__);

@@ -315,14 +317,20 @@ static int __net_init ip6addrlbl_net_ini
 	INIT_HLIST_HEAD(&net->ipv6.ip6addrlbl_table.head);
 
 	for (i = 0; i < ARRAY_SIZE(ip6addrlbl_init_table); i++) {
-		int ret = ip6addrlbl_add(net,
-					 ip6addrlbl_init_table[i].prefix,
-					 ip6addrlbl_init_table[i].prefixlen,
-					 0,
-					 ip6addrlbl_init_table[i].label, 0);
-		/* XXX: should we free all rules when we catch an error? */
-		if (ret && (!err || err != -ENOMEM))
-			err = ret;
+		err = ip6addrlbl_add(net,
+				     ip6addrlbl_init_table[i].prefix,
+				     ip6addrlbl_init_table[i].prefixlen,
+				     0,
+				     ip6addrlbl_init_table[i].label, 0);
+		if (err)
+			goto err_ip6addrlbl_add;
+	}
+	return 0;
+
+err_ip6addrlbl_add:
+	hlist_for_each_entry_safe(p, n, &net->ipv6.ip6addrlbl_table.head, list) {
+		hlist_del_rcu(&p->list);
+		kfree_rcu(p, rcu);
 	}
 	return err;
 }

From: Julian Wiedmann <[email protected]>

[ Upstream commit c5dab0941fcdc9664eb0ec0d4d51433216d91336 ]

Child sockets erroneously inherit their parent's sk_type (ie. SOCK_*), instead of the PF_IUCV protocol that the parent was created with in iucv_sock_create().

We're currently not using sk->sk_protocol ourselves, so this shouldn't have much impact (except eg. getting the output in skb_dump() right).

---
 net/iucv/af_iucv.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -1782,7 +1782,7 @@ static int iucv_callback_connreq(struct
 	}
 
 	/* Create the new socket */
-	nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0);
+	nsk = iucv_sock_alloc(NULL, sk->sk_protocol, GFP_ATOMIC, 0);
 	if (!nsk) {
 		err = pr_iucv->path_sever(path, user_data);
 		iucv_path_free(path);

@@ -1992,7 +1992,7 @@ static int afiucv_hs_callback_syn(struct
 		goto out;
 	}
 
-	nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC, 0);
+	nsk = iucv_sock_alloc(NULL, sk->sk_protocol, GFP_ATOMIC, 0);
 	bh_lock_sock(sk);
 	if ((sk->sk_state != IUCV_LISTEN) ||
 	    sk_acceptq_is_full(sk) ||

From: Vadim Fedorenko <[email protected]>

[ Upstream commit 20ffc7adf53a5fd3d19751fbff7895bcca66686e ]

In case when tcp socket received FIN after some data and the parser haven't started before reading data caller will receive an empty buffer. This behavior differs from plain TCP socket and leads to special treating in user-space.
The flow that triggers the race is simple. Server sends small amount of data right after the connection is configured to use TLS and closes the connection. In this case receiver sees TLS Handshake data, configures TLS socket right after Change Cipher Spec record. While the configuration is in process, TCP socket receives small Application Data record, Encrypted Alert record and FIN packet. So the TCP socket changes sk_shutdown to RCV_SHUTDOWN and sk_flag with SK_DONE bit set. The received data is not parsed upon arrival and is never sent to user-space.

Patch unpauses parser directly if we have unparsed data in tcp receive queue.

---
 net/tls/tls_sw.c |    6 ++++++
 1 file changed, 6 insertions(+)

@@ -630,6 +630,12 @@ static struct sk_buff *tls_wait_data(str
 			return NULL;
 		}
 
+		if (!skb_queue_empty(&sk->sk_receive_queue)) {
+			__strp_unpause(&ctx->strp);
+			if (ctx->recv_pkt)
+				return ctx->recv_pkt;
+		}
+
 		if (sk->sk_shutdown & RCV_SHUTDOWN)
 			return NULL;
 

From: Anmol Karn <[email protected]>

[ Upstream commit 3b3fd068c56e3fbea30090859216a368398e39bf ]

rose_send_frame() dereferences neigh->dev when called from rose_transmit_clear_request(), and the first occurrence of the neigh is in rose_loopback_timer() as rose_loopback_neigh, and it is initialized in rose_add_loopback_neigh() as NULL. i.e when rose_loopback_neigh used in rose_loopback_timer() its ->dev was still NULL and rose_loopback_timer() was calling rose_rx_call_request() without checking for NULL.

- net/rose/rose_link.c
This bug seems to get triggered in this line:

rose_call = (ax25_address *)neigh->dev->dev_addr;

Fix it by adding NULL checking for rose_loopback_neigh->dev in rose_loopback_timer().

---
 net/rose/rose_loopback.c |   17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

@@ -99,10 +99,19 @@ static void rose_loopback_timer(struct t
 		}
 
 		if (frametype == ROSE_CALL_REQUEST) {
-			if ((dev = rose_dev_get(dest)) != NULL) {
-				if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0)
-					kfree_skb(skb);
-			} else {
+			if (!rose_loopback_neigh->dev) {
+				kfree_skb(skb);
+				continue;
+			}
+
+			dev = rose_dev_get(dest);
+			if (!dev) {
+				kfree_skb(skb);
+				continue;
+			}
+
+			if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) {
+				dev_put(dev);
 				kfree_skb(skb);
 			}
 		} else {

From: Willem de Bruijn <[email protected]>

[ Upstream commit 985f7337421a811cb354ca93882f943c8335a6f5 ]

When setting sk_err, set it to ee_errno, not ee_origin.

Commit f5f99309fa74 ("sock: do not set sk_err in sock_dequeue_err_skb") disabled updating sk_err on errq dequeue, which is correct for most error types (origins):

- sk->sk_err = err;

Commit 38b257938ac6 ("sock: reset sk_err when the error queue is empty") reenabled the behavior for IMCP origins, which do require it:

+ if (icmp_next)
+ sk->sk_err = SKB_EXT_ERR(skb_next)->ee.ee_origin;

But read from ee_errno.

---
 net/core/skbuff.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -4265,7 +4265,7 @@ struct sk_buff *sock_dequeue_err_skb(str
 	if (skb && (skb_next = skb_peek(q))) {
 		icmp_next = is_icmp_err_skb(skb_next);
 		if (icmp_next)
-			sk->sk_err = SKB_EXT_ERR(skb_next)->ee.ee_origin;
+			sk->sk_err = SKB_EXT_ERR(skb_next)->ee.ee_errno;
 	}
 	spin_unlock_irqrestore(&q->lock, flags);
 

From: Alexander Duyck <[email protected]>

[ Upstream commit 55472017a4219ca965a957584affdb17549ae4a4 ]

When setting congestion control via a BPF program it is seen that the SYN/ACK for packets within a given flow will not include the ECT0 flag. A bit of simple printk debugging shows that when this is configured without BPF we will see the value INET_ECN_xmit value initialized in tcp_assign_congestion_control however when we configure this via BPF the socket is in the closed state and as such it isn't configured, and I do not see it being initialized when we transition the socket into the listen state. The result of this is that the ECT0 bit is configured based on whatever the default state is for the socket.

Any easy way to reproduce this is to monitor the following with tcpdump:
tools/testing/selftests/bpf/test_progs -t bpf_tcp_ca

Without this patch the SYN/ACK will follow whatever the default is. If dctcp all SYN/ACK packets will have the ECT0 bit set, and if it is not then ECT0 will be cleared on all SYN/ACK packets. With this patch applied the SYN/ACK bit matches the value seen on the other packets in the given stream.

---
 net/ipv4/tcp_cong.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -196,6 +196,11 @@ static void tcp_reinit_congestion_contro
 	icsk->icsk_ca_setsockopt = 1;
 	memset(icsk->icsk_ca_priv, 0, sizeof(icsk->icsk_ca_priv));
 
+	if (ca->flags & TCP_CONG_NEEDS_ECN)
+		INET_ECN_xmit(sk);
+	else
+		INET_ECN_dontxmit(sk);
+
 	if (!((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)))
 		tcp_init_congestion_control(sk);
 }

From: Jens Axboe <[email protected]>

[ Upstream commit 5aac0390a63b8718237a61dd0d24a29201d1c94a ]

tun only checks the file O_NONBLOCK flag, but it should also be checking the iocb IOCB_NOWAIT flag. Any fops using ->read/write_iter() should check both, otherwise it breaks users that correctly expect O_NONBLOCK semantics if IOCB_NOWAIT is set.

---
 drivers/net/tun.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

@@ -1988,12 +1988,15 @@ static ssize_t tun_chr_write_iter(struct
 	struct tun_file *tfile = file->private_data;
 	struct tun_struct *tun = tun_get(tfile);
 	ssize_t result;
+	int noblock = 0;
 
 	if (!tun)
 		return -EBADFD;
 
-	result = tun_get_user(tun, tfile, NULL, from,
-			      file->f_flags & O_NONBLOCK, false);
+	if ((file->f_flags & O_NONBLOCK) || (iocb->ki_flags & IOCB_NOWAIT))
+		noblock = 1;
+
+	result = tun_get_user(tun, tfile, NULL, from, noblock, false);
 
 	tun_put(tun);
 	return result;

@@ -2214,10 +2217,15 @@ static ssize_t tun_chr_read_iter(struct
 	struct tun_file *tfile = file->private_data;
 	struct tun_struct *tun = tun_get(tfile);
 	ssize_t len = iov_iter_count(to), ret;
+	int noblock = 0;
 
 	if (!tun)
 		return -EBADFD;
-	ret = tun_do_read(tun, tfile, to, file->f_flags & O_NONBLOCK, NULL);
+
+	if ((file->f_flags & O_NONBLOCK) || (iocb->ki_flags & IOCB_NOWAIT))
+		noblock = 1;
+
+	ret = tun_do_read(tun, tfile, to, noblock, NULL);
 	ret = min_t(ssize_t, ret, len);
 	if (ret > 0)
 		iocb->ki_pos = ret;

From: Yves-Alexis Perez <[email protected]>

[ Upstream commit f33d9e2b48a34e1558b67a473a1fc1d6e793f93c ]

Starting with iOS 14 released in September 2020, connectivity using the personal hotspot USB tethering function of iOS devices is broken.

Communication between the host and the device (for example ICMP traffic or DNS resolution using the DNS service running in the device itself) works fine, but communication to endpoints further away doesn't work.

Investigation on the matter shows that no UDP and ICMP traffic from the tethered host is reaching the Internet at all. For TCP traffic there are exchanges between tethered host and server but packets are modified in transit leading to impossible communication.

After some trials Matti Vuorela discovered that reducing the URB buffer size by two bytes restored the previous behavior. While a better solution might exist to fix the issue, since the protocol is not publicly documented and considering the small size of the fix, let's do that.

---
 drivers/net/usb/ipheth.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -70,7 +70,7 @@
 #define IPHETH_USBINTF_SUBCLASS 253
 #define IPHETH_USBINTF_PROTO    1
 
-#define IPHETH_BUF_SIZE         1516
+#define IPHETH_BUF_SIZE         1514
 #define IPHETH_IP_ALIGN		2	/* padding at front of URB */
 #define IPHETH_TX_TIMEOUT       (5 * HZ)
 

From: Maxim Mikityanskiy <[email protected]>

[ Upstream commit 025cc2fb6a4e84e9a0552c0017dcd1c24b7ac7da ]

tls_device_offload_cleanup_rx doesn't clear tls_ctx->netdev after calling tls_dev_del if TLX TX offload is also enabled. Clearing tls_ctx->netdev gets postponed until tls_device_gc_task. It leaves a time frame when tls_device_down may get called and call tls_dev_del for RX one extra time, confusing the driver, which may lead to a crash.

This patch corrects this racy behavior by adding a flag to prevent tls_device_down from calling tls_dev_del the second time.

---
 include/net/tls.h    |    6 ++++++
 net/tls/tls_device.c |    5 ++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

@@ -163,6 +163,12 @@ enum {
 
 enum tls_context_flags {
 	TLS_RX_SYNC_RUNNING = 0,
+	/* tls_dev_del was called for the RX side, device state was released,
+	 * but tls_ctx->netdev might still be kept, because TX-side driver
+	 * resources might not be released yet. Used to prevent the second
+	 * tls_dev_del call in tls_device_down if it happens simultaneously.
+	 */
+	TLS_RX_DEV_CLOSED = 2,
 };
 
 struct cipher_context {

@@ -955,6 +955,8 @@ void tls_device_offload_cleanup_rx(struc
 	if (tls_ctx->tx_conf != TLS_HW) {
 		dev_put(netdev);
 		tls_ctx->netdev = NULL;
+	} else {
+		set_bit(TLS_RX_DEV_CLOSED, &tls_ctx->flags);
 	}
 out:
 	up_read(&device_offload_lock);

@@ -984,7 +986,8 @@ static int tls_device_down(struct net_de
 		if (ctx->tx_conf == TLS_HW)
 			netdev->tlsdev_ops->tls_dev_del(netdev, ctx,
 							TLS_OFFLOAD_CTX_DIR_TX);
-		if (ctx->rx_conf == TLS_HW)
+		if (ctx->rx_conf == TLS_HW &&
+		    !test_bit(TLS_RX_DEV_CLOSED, &ctx->flags))
 			netdev->tlsdev_ops->tls_dev_del(netdev, ctx,
 							TLS_OFFLOAD_CTX_DIR_RX);
 		WRITE_ONCE(ctx->netdev, NULL);

From: Lijun Pan <[email protected]>

[ Upstream commit 8393597579f5250636f1cff157ea73f402b6501e ]

When netdev_notify_peers was substituted in
commit 986103e7920c ("net/ibmvnic: Fix RTNL deadlock during device reset"), call_netdevice_notifiers(NETDEV_RESEND_IGMP, dev) was missed. Fix it now.

---
 drivers/net/ethernet/ibm/ibmvnic.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -1878,8 +1878,10 @@ static int do_reset(struct ibmvnic_adapt
 		napi_schedule(&adapter->napi[i]);
 
 	if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
-	    adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
+	    adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) {
 		call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
+		call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
+	}
 
 	netif_carrier_on(netdev);
 

From: Lijun Pan <[email protected]>

[ Upstream commit 98025bce3a6200a0c4637272a33b5913928ba5b8 ]

Commit 61d3e1d9bc2a ("ibmvnic: Remove netdev notify for failover resets") excluded the failover case for notify call because it said netdev_notify_peers() can cause network traffic to stall or halt. Current testing does not show network traffic stall
or halt because of the notify call for failover event. netdev_notify_peers may be used when a device wants to inform the rest of the network about some sort of a reconfiguration
such as failover or migration.

It is unnecessary to call that in other events like FATAL, NON_FATAL, CHANGE_PARAM, and TIMEOUT resets
since in those scenarios the hardware does not change.
If the driver must do a hard reset, it is necessary to notify peers.

---
 drivers/net/ethernet/ibm/ibmvnic.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

@@ -1877,8 +1877,9 @@ static int do_reset(struct ibmvnic_adapt
 	for (i = 0; i < adapter->req_rx_queues; i++)
 		napi_schedule(&adapter->napi[i]);
 
-	if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
-	    adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) {
+	if ((adapter->reset_reason != VNIC_RESET_FAILOVER &&
+	     adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) ||
+	     adapter->reset_reason == VNIC_RESET_MOBILITY) {
 		call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
 		call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
 	}

@@ -2106,6 +2107,9 @@ static int ibmvnic_reset(struct ibmvnic_
 	netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
 	schedule_work(&adapter->ibmvnic_reset);
 
+	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
+	call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
+
 	return 0;
 err:
 	if (adapter->wait_for_reset)

Hi!

Something went wrong here.

http://www.livejournal.com/~pavelmachek

Odd, ok, I'll just go drop this patch from the queue, thanks.

greg k-h

From: Sylwester Dziedziuch <[email protected]>

[ Upstream commit 2980cbd4dce7b1e9bf57df3ced43a7b184986f50 ]

Prevent VFs from resetting when PF driver is being unloaded:
- introduce new pf state: __I40E_VF_RESETS_DISABLED;
- check if pf state has __I40E_VF_RESETS_DISABLED state set, if so, disable any further VFLR event notifications;
- when i40e_remove (rmmod i40e) is called, disable any resets on the VFs;

Previously if there were bare-metal VFs passing traffic and PF driver was removed, there was a possibility of VFs triggering a Tx timeout right before iavf_remove. This was causing iavf_close to not be called because there is a check in the beginning of iavf_remove that bails out early if adapter->state < IAVF_DOWN_PENDING. This makes it so some resources do not get cleaned up.

---
 drivers/net/ethernet/intel/i40e/i40e.h             |    1 
 drivers/net/ethernet/intel/i40e/i40e_main.c        |   22 ++++++++++++-----
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c |   26 ++++++++++++---------
 3 files changed, 31 insertions(+), 18 deletions(-)

@@ -147,6 +147,7 @@ enum i40e_state_t {
 	__I40E_CLIENT_SERVICE_REQUESTED,
 	__I40E_CLIENT_L2_CHANGE,
 	__I40E_CLIENT_RESET,
+	__I40E_VF_RESETS_DISABLED,	/* disable resets during i40e_remove */
 	/* This must be last as it determines the size of the BITMAP */
 	__I40E_STATE_SIZE__,
 };

@@ -3895,8 +3895,16 @@ static irqreturn_t i40e_intr(int irq, vo
 	}
 
 	if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
-		ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
-		set_bit(__I40E_VFLR_EVENT_PENDING, pf->state);
+		/* disable any further VFLR event notifications */
+		if (test_bit(__I40E_VF_RESETS_DISABLED, pf->state)) {
+			u32 reg = rd32(hw, I40E_PFINT_ICR0_ENA);
+
+			reg &= ~I40E_PFINT_ICR0_VFLR_MASK;
+			wr32(hw, I40E_PFINT_ICR0_ENA, reg);
+		} else {
+			ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
+			set_bit(__I40E_VFLR_EVENT_PENDING, pf->state);
+		}
 	}
 
 	if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {

@@ -14155,6 +14163,11 @@ static void i40e_remove(struct pci_dev *
 	while (test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
 		usleep_range(1000, 2000);
 
+	if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
+		set_bit(__I40E_VF_RESETS_DISABLED, pf->state);
+		i40e_free_vfs(pf);
+		pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
+	}
 	/* no more scheduling of any task */
 	set_bit(__I40E_SUSPENDED, pf->state);
 	set_bit(__I40E_DOWN, pf->state);

@@ -14168,11 +14181,6 @@ static void i40e_remove(struct pci_dev *
 	 */
 	i40e_notify_client_of_netdev_close(pf->vsi[pf->lan_vsi], false);
 
-	if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
-		i40e_free_vfs(pf);
-		pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
-	}
-
 	i40e_fdir_teardown(pf);
 
 	/* If there is a switch structure or any orphans, remove them.

@@ -1204,7 +1204,8 @@ static void i40e_cleanup_reset_vf(struct
  * @vf: pointer to the VF structure
  * @flr: VFLR was issued or not
  *
- * Returns true if the VF is reset, false otherwise.
+ * Returns true if the VF is in reset, resets successfully, or resets
+ * are disabled and false otherwise.
  **/
 bool i40e_reset_vf(struct i40e_vf *vf, bool flr)
 {

@@ -1214,11 +1215,14 @@ bool i40e_reset_vf(struct i40e_vf *vf, b
 	u32 reg;
 	int i;
 
+	if (test_bit(__I40E_VF_RESETS_DISABLED, pf->state))
+		return true;
+
 	/* If the VFs have been disabled, this means something else is
 	 * resetting the VF, so we shouldn't continue.
 	 */
 	if (test_and_set_bit(__I40E_VF_DISABLE, pf->state))
-		return false;
+		return true;
 
 	i40e_trigger_vf_reset(vf, flr);
 

@@ -1382,6 +1386,15 @@ void i40e_free_vfs(struct i40e_pf *pf)
 
 	i40e_notify_client_of_vf_enable(pf, 0);
 
+	/* Disable IOV before freeing resources. This lets any VF drivers
+	 * running in the host get themselves cleaned up before we yank
+	 * the carpet out from underneath their feet.
+	 */
+	if (!pci_vfs_assigned(pf->pdev))
+		pci_disable_sriov(pf->pdev);
+	else
+		dev_warn(&pf->pdev->dev, "VFs are assigned - not disabling SR-IOV\n");
+
 	/* Amortize wait time by stopping all VFs at the same time */
 	for (i = 0; i < pf->num_alloc_vfs; i++) {
 		if (test_bit(I40E_VF_STATE_INIT, &pf->vf[i].vf_states))

@@ -1397,15 +1410,6 @@ void i40e_free_vfs(struct i40e_pf *pf)
 		i40e_vsi_wait_queues_disabled(pf->vsi[pf->vf[i].lan_vsi_idx]);
 	}
 
-	/* Disable IOV before freeing resources. This lets any VF drivers
-	 * running in the host get themselves cleaned up before we yank
-	 * the carpet out from underneath their feet.
-	 */
-	if (!pci_vfs_assigned(pf->pdev))
-		pci_disable_sriov(pf->pdev);
-	else
-		dev_warn(&pf->pdev->dev, "VFs are assigned - not disabling SR-IOV\n");
-
 	/* free up VF resources */
 	tmp = pf->num_alloc_vfs;
 	pf->num_alloc_vfs = 0;

From: Jamie Iles <[email protected]>

[ Upstream commit b9ad3e9f5a7a760ab068e33e1f18d240ba32ce92 ]

syzkaller found that with CONFIG_DEBUG_KOBJECT_RELEASE=y, releasing a struct slave device could result in the following splat:

kobject: 'bonding_slave' (00000000cecdd4fe): kobject_release, parent 0000000074ceb2b2 (delayed 1000) bond0 (unregistering): (slave bond_slave_1): Releasing backup interface

  ------------[ cut here ]------------
  ODEBUG: free active (active state 0) object type: timer_list hint: workqueue_select_cpu_near kernel/workqueue.c:1549 [inline]
  ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x98 kernel/workqueue.c:1600
  WARNING: CPU: 1 PID: 842 at lib/debugobjects.c:485 debug_print_object+0x180/0x240 lib/debugobjects.c:485
  Kernel panic - not syncing: panic_on_warn set ...
  CPU: 1 PID: 842 Comm: kworker/u4:4 Tainted: G S                5.9.0-rc8+ #96
  Hardware name: linux,dummy-virt (DT)
  Workqueue: netns cleanup_net
  Call trace:
   dump_backtrace+0x0/0x4d8 include/linux/bitmap.h:239
   show_stack+0x34/0x48 arch/arm64/kernel/traps.c:142
   __dump_stack lib/dump_stack.c:77 [inline]
   dump_stack+0x174/0x1f8 lib/dump_stack.c:118
   panic+0x360/0x7a0 kernel/panic.c:231
   __warn+0x244/0x2ec kernel/panic.c:600
   report_bug+0x240/0x398 lib/bug.c:198
   bug_handler+0x50/0xc0 arch/arm64/kernel/traps.c:974
   call_break_hook+0x160/0x1d8 arch/arm64/kernel/debug-monitors.c:322
   brk_handler+0x30/0xc0 arch/arm64/kernel/debug-monitors.c:329
   do_debug_exception+0x184/0x340 arch/arm64/mm/fault.c:864
   el1_dbg+0x48/0xb0 arch/arm64/kernel/entry-common.c:65
   el1_sync_handler+0x170/0x1c8 arch/arm64/kernel/entry-common.c:93
   el1_sync+0x80/0x100 arch/arm64/kernel/entry.S:594
   debug_print_object+0x180/0x240 lib/debugobjects.c:485
   __debug_check_no_obj_freed lib/debugobjects.c:967 [inline]
   debug_check_no_obj_freed+0x200/0x430 lib/debugobjects.c:998
   slab_free_hook mm/slub.c:1536 [inline]
   slab_free_freelist_hook+0x190/0x210 mm/slub.c:1577
   slab_free mm/slub.c:3138 [inline]
   kfree+0x13c/0x460 mm/slub.c:4119
   bond_free_slave+0x8c/0xf8 drivers/net/bonding/bond_main.c:1492
   __bond_release_one+0xe0c/0xec8 drivers/net/bonding/bond_main.c:2190
   bond_slave_netdev_event drivers/net/bonding/bond_main.c:3309 [inline]
   bond_netdev_event+0x8f0/0xa70 drivers/net/bonding/bond_main.c:3420
   notifier_call_chain+0xf0/0x200 kernel/notifier.c:83
   __raw_notifier_call_chain kernel/notifier.c:361 [inline]
   raw_notifier_call_chain+0x44/0x58 kernel/notifier.c:368
   call_netdevice_notifiers_info+0xbc/0x150 net/core/dev.c:2033
   call_netdevice_notifiers_extack net/core/dev.c:2045 [inline]
   call_netdevice_notifiers net/core/dev.c:2059 [inline]
   rollback_registered_many+0x6a4/0xec0 net/core/dev.c:9347
   unregister_netdevice_many.part.0+0x2c/0x1c0 net/core/dev.c:10509
   unregister_netdevice_many net/core/dev.c:10508 [inline]
   default_device_exit_batch+0x294/0x338 net/core/dev.c:10992
   ops_exit_list.isra.0+0xec/0x150 net/core/net_namespace.c:189
   cleanup_net+0x44c/0x888 net/core/net_namespace.c:603
   process_one_work+0x96c/0x18c0 kernel/workqueue.c:2269
   worker_thread+0x3f0/0xc30 kernel/workqueue.c:2415
   kthread+0x390/0x498 kernel/kthread.c:292
   ret_from_fork+0x10/0x18 arch/arm64/kernel/entry.S:925

This is a potential use-after-free if the sysfs nodes are being accessed whilst removing the struct slave, so wait for the object destruction to complete before freeing the struct slave itself.

---
 drivers/net/bonding/bond_main.c        |   61 +++++++++++++++++++++++----------
 drivers/net/bonding/bond_sysfs_slave.c |   18 ---------
 include/net/bonding.h                  |    8 ++++
 3 files changed, 52 insertions(+), 35 deletions(-)

@@ -1268,7 +1268,39 @@ static void bond_upper_dev_unlink(struct
 	slave->dev->flags &= ~IFF_SLAVE;
 }
 
-static struct slave *bond_alloc_slave(struct bonding *bond)
+static void slave_kobj_release(struct kobject *kobj)
+{
+	struct slave *slave = to_slave(kobj);
+	struct bonding *bond = bond_get_bond_by_slave(slave);
+
+	cancel_delayed_work_sync(&slave->notify_work);
+	if (BOND_MODE(bond) == BOND_MODE_8023AD)
+		kfree(SLAVE_AD_INFO(slave));
+
+	kfree(slave);
+}
+
+static struct kobj_type slave_ktype = {
+	.release = slave_kobj_release,
+#ifdef CONFIG_SYSFS
+	.sysfs_ops = &slave_sysfs_ops,
+#endif
+};
+
+static int bond_kobj_init(struct slave *slave)
+{
+	int err;
+
+	err = kobject_init_and_add(&slave->kobj, &slave_ktype,
+				   &(slave->dev->dev.kobj), "bonding_slave");
+	if (err)
+		kobject_put(&slave->kobj);
+
+	return err;
+}
+
+static struct slave *bond_alloc_slave(struct bonding *bond,
+				      struct net_device *slave_dev)
 {
 	struct slave *slave = NULL;
 

@@ -1276,11 +1308,17 @@ static struct slave *bond_alloc_slave(st
 	if (!slave)
 		return NULL;
 
+	slave->bond = bond;
+	slave->dev = slave_dev;
+
+	if (bond_kobj_init(slave))
+		return NULL;
+
 	if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 		SLAVE_AD_INFO(slave) = kzalloc(sizeof(struct ad_slave_info),
 					       GFP_KERNEL);
 		if (!SLAVE_AD_INFO(slave)) {
-			kfree(slave);
+			kobject_put(&slave->kobj);
 			return NULL;
 		}
 	}

@@ -1289,17 +1327,6 @@ static struct slave *bond_alloc_slave(st
 	return slave;
 }
 
-static void bond_free_slave(struct slave *slave)
-{
-	struct bonding *bond = bond_get_bond_by_slave(slave);
-
-	cancel_delayed_work_sync(&slave->notify_work);
-	if (BOND_MODE(bond) == BOND_MODE_8023AD)
-		kfree(SLAVE_AD_INFO(slave));
-
-	kfree(slave);
-}
-
 static void bond_fill_ifbond(struct bonding *bond, struct ifbond *info)
 {
 	info->bond_mode = BOND_MODE(bond);

@@ -1487,14 +1514,12 @@ int bond_enslave(struct net_device *bond
 	    bond->dev->addr_assign_type == NET_ADDR_RANDOM)
 		bond_set_dev_addr(bond->dev, slave_dev);
 
-	new_slave = bond_alloc_slave(bond);
+	new_slave = bond_alloc_slave(bond, slave_dev);
 	if (!new_slave) {
 		res = -ENOMEM;
 		goto err_undo_flags;
 	}
 
-	new_slave->bond = bond;
-	new_slave->dev = slave_dev;
 	/* Set the new_slave's queue_id to be zero.  Queue ID mapping
 	 * is set via sysfs or module option if desired.
 	 */

@@ -1821,7 +1846,7 @@ err_restore_mtu:
 	dev_set_mtu(slave_dev, new_slave->original_mtu);
 
 err_free:
-	bond_free_slave(new_slave);
+	kobject_put(&new_slave->kobj);
 
 err_undo_flags:
 	/* Enslave of first slave has failed and we need to fix master's mac */

@@ -2009,7 +2034,7 @@ static int __bond_release_one(struct net
 	if (!netif_is_bond_master(slave_dev))
 		slave_dev->priv_flags &= ~IFF_BONDING;
 
-	bond_free_slave(slave);
+	kobject_put(&slave->kobj);
 
 	return 0;
 }

@@ -125,7 +125,6 @@ static const struct slave_attribute *sla
 };
 
 #define to_slave_attr(_at) container_of(_at, struct slave_attribute, attr)
-#define to_slave(obj)	container_of(obj, struct slave, kobj)
 
 static ssize_t slave_show(struct kobject *kobj,
 			  struct attribute *attr, char *buf)

@@ -136,28 +135,15 @@ static ssize_t slave_show(struct kobject
 	return slave_attr->show(slave, buf);
 }
 
-static const struct sysfs_ops slave_sysfs_ops = {
+const struct sysfs_ops slave_sysfs_ops = {
 	.show = slave_show,
 };
 
-static struct kobj_type slave_ktype = {
-#ifdef CONFIG_SYSFS
-	.sysfs_ops = &slave_sysfs_ops,
-#endif
-};
-
 int bond_sysfs_slave_add(struct slave *slave)
 {
 	const struct slave_attribute **a;
 	int err;
 
-	err = kobject_init_and_add(&slave->kobj, &slave_ktype,
-				   &(slave->dev->dev.kobj), "bonding_slave");
-	if (err) {
-		kobject_put(&slave->kobj);
-		return err;
-	}
-
 	for (a = slave_attrs; *a; ++a) {
 		err = sysfs_create_file(&slave->kobj, &((*a)->attr));
 		if (err) {

@@ -175,6 +161,4 @@ void bond_sysfs_slave_del(struct slave *
 
 	for (a = slave_attrs; *a; ++a)
 		sysfs_remove_file(&slave->kobj, &((*a)->attr));
-
-	kobject_put(&slave->kobj);
 }

@@ -170,6 +170,11 @@ struct slave {
 	struct rtnl_link_stats64 slave_stats;
 };
 
+static inline struct slave *to_slave(struct kobject *kobj)
+{
+	return container_of(kobj, struct slave, kobj);
+}
+
 struct bond_up_slave {
 	unsigned int	count;
 	struct rcu_head rcu;

@@ -733,6 +738,9 @@ extern struct bond_parm_tbl ad_select_tb
 /* exported from bond_netlink.c */
 extern struct rtnl_link_ops bond_link_ops;
 
+/* exported from bond_sysfs_slave.c */
+extern const struct sysfs_ops slave_sysfs_ops;
+
 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
 {
 	atomic_long_inc(&dev->tx_dropped);

From: Antoine Tenart <[email protected]>

[ Upstream commit 44f64f23bae2f0fad25503bc7ab86cd08d04cd47 ]

Netfilter changes PACKET_OTHERHOST to PACKET_HOST before invoking the hooks as, while it's an expected value for a bridge, routing expects PACKET_HOST. The change is undone later on after hook traversal. This can be seen with pairs of functions updating skb>pkt_type and then reverting it to its original value:

For hook NF_INET_PRE_ROUTING:
setup_pre_routing / br_nf_pre_routing_finish

For hook NF_INET_FORWARD:
br_nf_forward_ip / br_nf_forward_finish

But the third case where netfilter does this, for hook NF_INET_POST_ROUTING, the packet type is changed in br_nf_post_routing but never reverted. A comment says:

/* We assume any code from br_dev_queue_push_xmit onwards doesn't care
* about the value of skb->pkt_type. */

But when having a tunnel (say vxlan) attached to a bridge we have the following call trace:

br_nf_pre_routing
br_nf_pre_routing_ipv6
br_nf_pre_routing_finish
br_nf_forward_ip
br_nf_forward_finish
br_nf_post_routing <- pkt_type is updated to PACKET_HOST
br_nf_dev_queue_xmit <- but not reverted to its original value
vxlan_xmit
vxlan_xmit_one
skb_tunnel_check_pmtu <- a check on pkt_type is performed

In this specific case, this creates issues such as when an ICMPv6 PTB should be sent back. When CONFIG_BRIDGE_NETFILTER is enabled, the PTB isn't sent (as skb_tunnel_check_pmtu checks if pkt_type is PACKET_HOST and returns early).

If the comment is right and no one cares about the value of skb->pkt_type after br_dev_queue_push_xmit (which isn't true), resetting it to its original value should be safe.

---
 net/bridge/br_netfilter_hooks.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

@@ -719,6 +719,11 @@ static int br_nf_dev_queue_xmit(struct n
 	mtu_reserved = nf_bridge_mtu_reduction(skb);
 	mtu = skb->dev->mtu;
 
+	if (nf_bridge->pkt_otherhost) {
+		skb->pkt_type = PACKET_OTHERHOST;
+		nf_bridge->pkt_otherhost = false;
+	}
+
 	if (nf_bridge->frag_max_size && nf_bridge->frag_max_size < mtu)
 		mtu = nf_bridge->frag_max_size;
 

@@ -812,8 +817,6 @@ static unsigned int br_nf_post_routing(v
 	else
 		return NF_ACCEPT;
 
-	/* We assume any code from br_dev_queue_push_xmit onwards doesn't care
-	 * about the value of skb->pkt_type. */
 	if (skb->pkt_type == PACKET_OTHERHOST) {
 		skb->pkt_type = PACKET_HOST;
 		nf_bridge->pkt_otherhost = true;

From: Guillaume Nault <[email protected]>

[ Upstream commit 1ebf179037cb46c19da3a9c1e2ca16e7a754b75e ]

When inet_rtm_getroute() was converted to use the RCU variants of ip_route_input() and ip_route_output_key(), the TOS parameters stopped being masked with IPTOS_RT_MASK before doing the route lookup.

As a result, "ip route get" can return a different route than what would be used when sending real packets.

For example:

    $ ip route add 192.0.2.11/32 dev eth0
    $ ip route add unreachable 192.0.2.11/32 tos 2
    $ ip route get 192.0.2.11 tos 2
    RTNETLINK answers: No route to host

But, packets with TOS 2 (ECT(0) if interpreted as an ECN bit) would actually be routed using the first route:

    $ ping -c 1 -Q 2 192.0.2.11
    PING 192.0.2.11 (192.0.2.11) 56(84) bytes of data.
    64 bytes from 192.0.2.11: icmp_seq=1 ttl=64 time=0.173 ms

    --- 192.0.2.11 ping statistics ---
    1 packets transmitted, 1 received, 0% packet loss, time 0ms
    rtt min/avg/max/mdev = 0.173/0.173/0.173/0.000 ms

This patch re-applies IPTOS_RT_MASK in inet_rtm_getroute(), to return results consistent with real route lookups.

---
 net/ipv4/route.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

@@ -2876,7 +2876,7 @@ static int inet_rtm_getroute(struct sk_b
 	memset(&fl4, 0, sizeof(fl4));
 	fl4.daddr = dst;
 	fl4.saddr = src;
-	fl4.flowi4_tos = rtm->rtm_tos;
+	fl4.flowi4_tos = rtm->rtm_tos & IPTOS_RT_MASK;
 	fl4.flowi4_oif = tb[RTA_OIF] ? nla_get_u32(tb[RTA_OIF]) : 0;
 	fl4.flowi4_mark = mark;
 	fl4.flowi4_uid = uid;

@@ -2900,8 +2900,9 @@ static int inet_rtm_getroute(struct sk_b
 		fl4.flowi4_iif = iif; /* for rt_fill_info */
 		skb->dev	= dev;
 		skb->mark	= mark;
-		err = ip_route_input_rcu(skb, dst, src, rtm->rtm_tos,
-					 dev, &res);
+		err = ip_route_input_rcu(skb, dst, src,
+					 rtm->rtm_tos & IPTOS_RT_MASK, dev,
+					 &res);
 
 		rt = skb_rtable(skb);
 		if (err == 0 && rt->dst.error)

From: Thomas Falcon <[email protected]>

[ Upstream commit b71ec952234610b4f90ef17a2fdcb124d5320070 ]

Ensure that received Subordinate Command-Response Queue (SCRQ) entries are properly read in order by the driver. These queues are used in the ibmvnic device to process RX buffer and TX completion descriptors. dma_rmb barriers have been added after checking for a pending descriptor to ensure the correct descriptor entry is checked and after reading the SCRQ descriptor to ensure the entire descriptor is read before processing.

---
 drivers/net/ethernet/ibm/ibmvnic.c |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

@@ -2162,6 +2162,12 @@ restart_poll:
 
 		if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 			break;
+		/* The queue entry at the current index is peeked at above
+		 * to determine that there is a valid descriptor awaiting
+		 * processing. We want to be sure that the current slot
+		 * holds a valid descriptor before reading its contents.
+		 */
+		dma_rmb();
 		next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 		rx_buff =
 		    (struct ibmvnic_rx_buff *)be64_to_cpu(next->

@@ -2784,6 +2790,13 @@ restart_loop:
 		unsigned int pool = scrq->pool_index;
 		int num_entries = 0;
 
+		/* The queue entry at the current index is peeked at above
+		 * to determine that there is a valid descriptor awaiting
+		 * processing. We want to be sure that the current slot
+		 * holds a valid descriptor before reading its contents.
+		 */
+		dma_rmb();
+
 		next = ibmvnic_next_scrq(adapter, scrq);
 		for (i = 0; i < next->tx_comp.num_comps; i++) {
 			if (next->tx_comp.rcs[i]) {

@@ -3180,6 +3193,11 @@ static union sub_crq *ibmvnic_next_scrq(
 	}
 	spin_unlock_irqrestore(&scrq->lock, flags);
 
+	/* Ensure that the entire buffer descriptor has been
+	 * loaded before reading its contents
+	 */
+	dma_rmb();
+
 	return entry;
 }
 

From: Thomas Falcon <[email protected]>

[ Upstream commit ba246c175116e2e8fa4fdfa5f8e958e086a9a818 ]

TX completions received with an error return code are not being processed properly. When an error code is seen, do not proceed to the next completion before cleaning up the existing entry's data structures.

---
 drivers/net/ethernet/ibm/ibmvnic.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

@@ -2799,11 +2799,9 @@ restart_loop:
 
 		next = ibmvnic_next_scrq(adapter, scrq);
 		for (i = 0; i < next->tx_comp.num_comps; i++) {
-			if (next->tx_comp.rcs[i]) {
+			if (next->tx_comp.rcs[i])
 				dev_err(dev, "tx error %x\n",
 					next->tx_comp.rcs[i]);
-				continue;
-			}
 			index = be32_to_cpu(next->tx_comp.correlators[i]);
 			if (index & IBMVNIC_TSO_POOL_MASK) {
 				tx_pool = &adapter->tso_pool[pool];

From: Eric Dumazet <[email protected]>

[ Upstream commit 4179b00c04d18ea7013f68d578d80f3c9d13150a ]

IP_ECN_decapsulate() and IP6_ECN_decapsulate() assume IP header is already pulled.

geneve does not ensure this yet.

Fixing this generically in IP_ECN_decapsulate() and IP6_ECN_decapsulate() is not possible, since callers pass a pointer that might be freed by pskb_may_pull()

syzbot reported :

BUG: KMSAN: uninit-value in __INET_ECN_decapsulate include/net/inet_ecn.h:238 [inline]
BUG: KMSAN: uninit-value in INET_ECN_decapsulate+0x345/0x1db0 include/net/inet_ecn.h:260
CPU: 1 PID: 8941 Comm: syz-executor.0 Not tainted 5.10.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
 __INET_ECN_decapsulate include/net/inet_ecn.h:238 [inline]
 INET_ECN_decapsulate+0x345/0x1db0 include/net/inet_ecn.h:260
 geneve_rx+0x2103/0x2980 include/net/inet_ecn.h:306
 geneve_udp_encap_recv+0x105c/0x1340 drivers/net/geneve.c:377
 udp_queue_rcv_one_skb+0x193a/0x1af0 net/ipv4/udp.c:2093
 udp_queue_rcv_skb+0x282/0x1050 net/ipv4/udp.c:2167
 udp_unicast_rcv_skb net/ipv4/udp.c:2325 [inline]
 __udp4_lib_rcv+0x399d/0x5880 net/ipv4/udp.c:2394
 udp_rcv+0x5c/0x70 net/ipv4/udp.c:2564
 ip_protocol_deliver_rcu+0x572/0xc50 net/ipv4/ip_input.c:204
 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_local_deliver+0x583/0x8d0 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:428 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_rcv+0x5c3/0x840 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core net/core/dev.c:5315 [inline]
 __netif_receive_skb+0x1ec/0x640 net/core/dev.c:5429
 process_backlog+0x523/0xc10 net/core/dev.c:6319
 napi_poll+0x420/0x1010 net/core/dev.c:6763
 net_rx_action+0x35c/0xd40 net/core/dev.c:6833
 __do_softirq+0x1a9/0x6fa kernel/softirq.c:298
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x6e/0x90 arch/x86/kernel/irq_64.c:77
 do_softirq kernel/softirq.c:343 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:195
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:730 [inline]
 __dev_queue_xmit+0x3a9b/0x4520 net/core/dev.c:4167
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4173
 packet_snd net/packet/af_packet.c:2992 [inline]
 packet_sendmsg+0x86f9/0x99d0 net/packet/af_packet.c:3017
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 __sys_sendto+0x9dc/0xc80 net/socket.c:1992
 __do_sys_sendto net/socket.c:2004 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:2000
 __x64_sys_sendto+0x6e/0x90 net/socket.c:2000
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

---
 drivers/net/geneve.c |   20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

@@ -256,11 +256,21 @@ static void geneve_rx(struct geneve_dev
 		skb_dst_set(skb, &tun_dst->dst);
 
 	/* Ignore packet loops (and multicast echo) */
-	if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) {
-		geneve->dev->stats.rx_errors++;
-		goto drop;
-	}
+	if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr))
+		goto rx_error;
 
+	switch (skb_protocol(skb, true)) {
+	case htons(ETH_P_IP):
+		if (pskb_may_pull(skb, sizeof(struct iphdr)))
+			goto rx_error;
+		break;
+	case htons(ETH_P_IPV6):
+		if (pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+			goto rx_error;
+		break;
+	default:
+		goto rx_error;
+	}
 	oiph = skb_network_header(skb);
 	skb_reset_network_header(skb);
 

@@ -301,6 +311,8 @@ static void geneve_rx(struct geneve_dev
 		u64_stats_update_end(&stats->syncp);
 	}
 	return;
+rx_error:
+	geneve->dev->stats.rx_errors++;
 drop:
 	/* Consume bad packet */
 	kfree_skb(skb);

From: Antoine Tenart <[email protected]>

[ Upstream commit 832ba596494b2c9eac7760259eff2d8b7dcad0ee ]

syzkaller managed to crash the kernel using an NBMA ip6gre interface. I could reproduce it creating an NBMA ip6gre interface and forwarding traffic to it:

skbuff: skb_under_panic: text:ffffffff8250e927 len:148 put:44 head:ffff8c03c7a33

  ------------[ cut here ]------------
  kernel BUG at net/core/skbuff.c:109!
  Call Trace:
  skb_push+0x10/0x10
  ip6gre_header+0x47/0x1b0
  neigh_connected_output+0xae/0xf0

ip6gre tunnel provides its own header_ops->create, and sets it conditionally when initializing the tunnel in NBMA mode. When header_ops->create is used, dev->hard_header_len should reflect the length of the header created. Otherwise, when not used, dev->needed_headroom should be used.

---
 net/ipv6/ip6_gre.c |   16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

@@ -1140,8 +1140,13 @@ static void ip6gre_tnl_link_config_route
 			return;
 
 		if (rt->dst.dev) {
-			dev->needed_headroom = rt->dst.dev->hard_header_len +
-					       t_hlen;
+			unsigned short dst_len = rt->dst.dev->hard_header_len +
+						 t_hlen;
+
+			if (t->dev->header_ops)
+				dev->hard_header_len = dst_len;
+			else
+				dev->needed_headroom = dst_len;
 
 			if (set_mtu) {
 				dev->mtu = rt->dst.dev->mtu - t_hlen;

@@ -1166,7 +1171,12 @@ static int ip6gre_calc_hlen(struct ip6_t
 	tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen;
 
 	t_hlen = tunnel->hlen + sizeof(struct ipv6hdr);
-	tunnel->dev->needed_headroom = LL_MAX_HEADER + t_hlen;
+
+	if (tunnel->dev->header_ops)
+		tunnel->dev->hard_header_len = LL_MAX_HEADER + t_hlen;
+	else
+		tunnel->dev->needed_headroom = LL_MAX_HEADER + t_hlen;
+
 	return t_hlen;
 }
 

From: Dan Carpenter <[email protected]>

[ Upstream commit 6ee50c8e262a0f0693dad264c3c99e30e6442a56 ]

The .x25_addr[] address comes from the user and is not necessarily NUL terminated. This leads to a couple problems. The first problem is that the strlen() in x25_bind() can read beyond the end of the buffer.

The second problem is more subtle and could result in memory corruption. The call tree is:
x25_connect()
--> x25_write_internal()

      --> x25_addr_aton()

The .x25_addr[] buffers are copied to the "addresses" buffer from x25_write_internal() so it will lead to stack corruption.

Verify that the strings are NUL terminated and return -EINVAL if they are not.

---
 net/x25/af_x25.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

@@ -680,7 +680,8 @@ static int x25_bind(struct socket *sock,
 	int len, i, rc = 0;
 
 	if (addr_len != sizeof(struct sockaddr_x25) ||
-	    addr->sx25_family != AF_X25) {
+	    addr->sx25_family != AF_X25 ||
+	    strnlen(addr->sx25_addr.x25_addr, X25_ADDR_LEN) == X25_ADDR_LEN) {
 		rc = -EINVAL;
 		goto out;
 	}

@@ -774,7 +775,8 @@ static int x25_connect(struct socket *so
 
 	rc = -EINVAL;
 	if (addr_len != sizeof(struct sockaddr_x25) ||
-	    addr->sx25_family != AF_X25)
+	    addr->sx25_family != AF_X25 ||
+	    strnlen(addr->sx25_addr.x25_addr, X25_ADDR_LEN) == X25_ADDR_LEN)
 		goto out;
 
 	rc = -ENETUNREACH;

From: Zhang Changzhong <[email protected]>

[ Upstream commit ff9924897f8bfed82e61894b373ab9d2dfea5b10 ]

Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function.

---
 drivers/net/ethernet/chelsio/cxgb3/sge.c |    1 +
 1 file changed, 1 insertion(+)

@@ -3176,6 +3176,7 @@ int t3_sge_alloc_qset(struct adapter *ad
 			  GFP_KERNEL | __GFP_COMP);
 	if (!avail) {
 		CH_ALERT(adapter, "free list queue 0 initialization failed\n");
+		ret = -ENOMEM;
 		goto err;
 	}
 	if (avail < q->fl[0].size)

From: Zhang Changzhong <[email protected]>

[ Upstream commit aba84871bd4f52c4dfcf3ad5d4501a6c9d2de90e ]

Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function.

---
 drivers/net/ethernet/pasemi/pasemi_mac.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

@@ -1089,16 +1089,20 @@ static int pasemi_mac_open(struct net_de
 
 	mac->tx = pasemi_mac_setup_tx_resources(dev);
 
-	if (!mac->tx)
+	if (!mac->tx) {
+		ret = -ENOMEM;
 		goto out_tx_ring;
+	}
 
 	/* We might already have allocated rings in case mtu was changed
 	 * before interface was brought up.
 	 */
 	if (dev->mtu > 1500 && !mac->num_cs) {
 		pasemi_mac_setup_csrings(mac);
-		if (!mac->num_cs)
+		if (!mac->num_cs) {
+			ret = -ENOMEM;
 			goto out_tx_ring;
+		}
 	}
 
 	/* Zero out rmon counters */

From: Dan Carpenter <[email protected]>

[ Upstream commit 391119fb5c5c4bdb4d57c7ffeb5e8d18560783d1 ]

The "skb" is freed by the transmit code in cxgb4_ofld_send() and we shouldn't use it again. But in the current code, if we hit an error later on in the function then the clean up code will call kfree_skb(skb) and so it causes a double free.

Set the "skb" to NULL and that makes the kfree_skb() a no-op.

---
 drivers/crypto/chelsio/chtls/chtls_hw.c |    1 +
 1 file changed, 1 insertion(+)

@@ -376,6 +376,7 @@ int chtls_setkey(struct chtls_sock *csk,
 	csk->wr_unacked += DIV_ROUND_UP(len, 16);
 	enqueue_wr(csk, skb);
 	cxgb4_ofld_send(csk->egress_dev, skb);
+	skb = NULL;
 
 	chtls_set_scmd(csk);
 	/* Clear quiesce for Rx key */

From: Wang Hai <[email protected]>

[ Upstream commit 82a10dc7f0960735f40e8d7d3bee56934291600f ]

Fix to return negative error code -ENOENT from invalid configuration error handling case instead of 0, as done elsewhere in this function.

---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c |    1 +
 1 file changed, 1 insertion(+)

@@ -3363,6 +3363,7 @@ static int mvpp2_open(struct net_device
 	if (!valid) {
 		netdev_err(port->dev,
 			   "invalid configuration: no dt or link IRQ");
+		err = -ENOENT;
 		goto err_free_irq;
 	}
 

From: Eran Ben Elisha <[email protected]>

[ Upstream commit 1d2bb5ad89f47d8ce8aedc70ef85059ab3870292 ]

When command interface is down, driver to reclaim all 4K page chucks that were hold by the Firmeware. Fix a bug for 64K page size systems, where driver repeatedly released only the first chunk of the page.

Define helper function to fill 4K chunks for a given Firmware pages. Iterate over all unreleased Firmware pages and call the hepler per each.

---
 drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c |   21 ++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

@@ -331,6 +331,24 @@ out_free:
 	return err;
 }
 
+static u32 fwp_fill_manage_pages_out(struct fw_page *fwp, u32 *out, u32 index,
+				     u32 npages)
+{
+	u32 pages_set = 0;
+	unsigned int n;
+
+	for_each_clear_bit(n, &fwp->bitmask, MLX5_NUM_4K_IN_PAGE) {
+		MLX5_ARRAY_SET64(manage_pages_out, out, pas, index + pages_set,
+				 fwp->addr + (n * MLX5_ADAPTER_PAGE_SIZE));
+		pages_set++;
+
+		if (!--npages)
+			break;
+	}
+
+	return pages_set;
+}
+
 static int reclaim_pages_cmd(struct mlx5_core_dev *dev,
 			     u32 *in, int in_size, u32 *out, int out_size)
 {

@@ -354,8 +372,7 @@ static int reclaim_pages_cmd(struct mlx5
 		if (fwp->func_id != func_id)
 			continue;
 
-		MLX5_ARRAY_SET64(manage_pages_out, out, pas, i, fwp->addr);
-		i++;
+		i += fwp_fill_manage_pages_out(fwp, out, i, npages - i);
 	}
 
 	MLX5_SET(manage_pages_out, out, output_num_entries, i);

From: Vinay Kumar Yadav <[email protected]>

[ Upstream commit e3d5e971d2f83d8ddd4b91a50cea4517fb488383 ]

there is kernel panic in inet_twsk_free() while chtls module unload when socket is in TIME_WAIT state because sk_prot_creator was not preserved on connection socket.

---
 drivers/crypto/chelsio/chtls/chtls_cm.c |    1 +
 1 file changed, 1 insertion(+)

@@ -1079,6 +1079,7 @@ static struct sock *chtls_recv_sock(stru
 
 	oreq->ts_recent = PASS_OPEN_TID_G(ntohl(req->tos_stid));
 	sk_setup_caps(newsk, dst);
+	newsk->sk_prot_creator = lsk->sk_prot_creator;
 	csk->sk = newsk;
 	csk->passive_reap_next = oreq;
 	csk->tx_chan = cxgb4_port_chan(ndev);

From: Krzysztof Kozlowski <[email protected]>

[ Upstream commit 4d521943f76bd0d1e68ea5e02df7aadd30b2838a ]

GPIO_ACTIVE_x flags are not correct in the context of interrupt flags. These are simple defines so they could be used in DTS but they will not have the same meaning:
1. GPIO_ACTIVE_HIGH = 0 = IRQ_TYPE_NONE
2. GPIO_ACTIVE_LOW = 1 = IRQ_TYPE_EDGE_RISING

Correct the interrupt flags, assuming the author of the code wanted same logical behavior behind the name "ACTIVE_xxx", this is:
ACTIVE_LOW => IRQ_TYPE_LEVEL_LOW
ACTIVE_HIGH => IRQ_TYPE_LEVEL_HIGH

---
 Documentation/devicetree/bindings/net/nfc/nxp-nci.txt |    2 +-
 Documentation/devicetree/bindings/net/nfc/pn544.txt   |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

@@ -25,7 +25,7 @@ Example (for ARM-based BeagleBone with N
 		clock-frequency = <100000>;
 
 		interrupt-parent = <&gpio1>;
-		interrupts = <29 GPIO_ACTIVE_HIGH>;
+		interrupts = <29 IRQ_TYPE_LEVEL_HIGH>;
 
 		enable-gpios = <&gpio0 30 GPIO_ACTIVE_HIGH>;
 		firmware-gpios = <&gpio0 31 GPIO_ACTIVE_HIGH>;

@@ -25,7 +25,7 @@ Example (for ARM-based BeagleBone with P
 		clock-frequency = <400000>;
 
 		interrupt-parent = <&gpio1>;
-		interrupts = <17 GPIO_ACTIVE_HIGH>;
+		interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
 
 		enable-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
 		firmware-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;

From: Hector Martin <[email protected]>

commit 402d5840b0d40a2a26c8651165d29b534abb6d36 upstream.

The level meter control returns 34 integers of info. This fixes:

snd-usb-audio 3-1:1.0: control 2:0:0:Level Meter:0: access overflow

---
 sound/usb/mixer_us16x08.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -617,7 +617,7 @@ static int snd_us16x08_eq_put(struct snd
 static int snd_us16x08_meter_info(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_info *uinfo)
 {
-	uinfo->count = 1;
+	uinfo->count = 34;
 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 	uinfo->value.integer.max = 0x7FFF;
 	uinfo->value.integer.min = 0;

From: Sanjay Govind <[email protected]>

commit 2aab1561439032be2e98811dd0ddbeb5b2ae4c61 upstream.

This commit adds support for Ardwiino Controllers

---
 drivers/input/joystick/xpad.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -255,6 +255,7 @@ static const struct xpad_device {
 	{ 0x1038, 0x1430, "SteelSeries Stratus Duo", 0, XTYPE_XBOX360 },
 	{ 0x1038, 0x1431, "SteelSeries Stratus Duo", 0, XTYPE_XBOX360 },
 	{ 0x11c9, 0x55f0, "Nacon GC-100XF", 0, XTYPE_XBOX360 },
+	{ 0x1209, 0x2882, "Ardwiino Controller", 0, XTYPE_XBOX360 },
 	{ 0x12ab, 0x0004, "Honey Bee Xbox360 dancepad", MAP_DPAD_TO_BUTTONS, XTYPE_XBOX360 },
 	{ 0x12ab, 0x0301, "PDP AFTERGLOW AX.1", 0, XTYPE_XBOX360 },
 	{ 0x12ab, 0x0303, "Mortal Kombat Klassic FightStick", MAP_TRIGGERS_TO_BUTTONS, XTYPE_XBOX360 },

@@ -432,6 +433,7 @@ static const struct usb_device_id xpad_t
 	XPAD_XBOXONE_VENDOR(0x0f0d),		/* Hori Controllers */
 	XPAD_XBOX360_VENDOR(0x1038),		/* SteelSeries Controllers */
 	XPAD_XBOX360_VENDOR(0x11c9),		/* Nacon GC100XF */
+	XPAD_XBOX360_VENDOR(0x1209),		/* Ardwiino Controllers */
 	XPAD_XBOX360_VENDOR(0x12ab),		/* X-Box 360 dance pads */
 	XPAD_XBOX360_VENDOR(0x1430),		/* RedOctane X-Box 360 controllers */
 	XPAD_XBOX360_VENDOR(0x146b),		/* BigBen Interactive Controllers */

From: Po-Hsu Lin <[email protected]>

commit a48491c65b513e5cdc3e7a886a4db915f848a5f5 upstream.

It looks like the C15B laptop got another vendor: ByteSpeed LLC.

Avoid AUX loopback on this touchpad as well, thus input subsystem will be able to recognize a Synaptics touchpad in the AUX port.

---
 drivers/input/serio/i8042-x86ia64io.h |    4 ++++
 1 file changed, 4 insertions(+)

@@ -223,6 +223,10 @@ static const struct dmi_system_id __init
 			DMI_MATCH(DMI_SYS_VENDOR, "PEGATRON CORPORATION"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "C15B"),
 		},
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ByteSpeed LLC"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "ByteSpeed Laptop C15B"),
+		},
 	},
 	{ }
 };

From: Vasily Averin <[email protected]>

commit 310e3a4b5a4fc718a72201c1e4cf5c64ac6f5442 upstream.

This patch reverts commit 978defee11a5 ("tracing: Do a WARN_ON()
if start_thread() in hwlat is called when thread exists")

.start hook can be legally called several times if according tracer is stopped

screen window 1
[root@localhost ~]# echo 1 > /sys/kernel/tracing/events/kmem/kfree/enable [root@localhost ~]# echo 1 > /sys/kernel/tracing/options/pause-on-trace [root@localhost ~]# less -F /sys/kernel/tracing/trace

screen window 2
[root@localhost ~]# cat /sys/kernel/debug/tracing/tracing_on
0
[root@localhost ~]# echo hwlat > /sys/kernel/debug/tracing/current_tracer [root@localhost ~]# echo 1 > /sys/kernel/debug/tracing/tracing_on [root@localhost ~]# cat /sys/kernel/debug/tracing/tracing_on
0
[root@localhost ~]# echo 2 > /sys/kernel/debug/tracing/tracing_on

triggers warning in dmesg:

WARNING: CPU: 3 PID: 1403 at kernel/trace/trace_hwlat.c:371 hwlat_tracer_start+0xc9/0xd0

---
 kernel/trace/trace_hwlat.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -355,7 +355,7 @@ static int start_kthread(struct trace_ar
 	struct task_struct *kthread;
 	int next_cpu;
 
-	if (WARN_ON(hwlat_kthread))
+	if (hwlat_kthread)
 		return 0;
 
 	/* Just pick the first CPU on first iteration */

From: Shiraz Saleem <[email protected]>

commit 2ed381439e89fa6d1a0839ef45ccd45d99d8e915 upstream.

i40iw_mmap manipulates the vma->vm_pgoff to differentiate a push page mmap vs a doorbell mmap, and uses it to compute the pfn in remap_pfn_range without any validation. This is vulnerable to an mmap exploit as described
in: https://lore.kernel.org/r/[email protected]

The push feature is disabled in the driver currently and therefore no push mmaps are issued from user-space. The feature does not work as expected in the x722 product.

Remove the push module parameter and all VMA attribute manipulations for this feature in i40iw_mmap. Update i40iw_mmap to only allow DB user mmapings at offset = 0. Check vm_pgoff for zero and if the mmaps are bound to a single page.

---
 drivers/infiniband/hw/i40iw/i40iw_main.c  |    5 ----
 drivers/infiniband/hw/i40iw/i40iw_verbs.c |   36 +++++-------------------------
 2 files changed, 7 insertions(+), 34 deletions(-)

@@ -54,10 +54,6 @@
 #define DRV_VERSION	__stringify(DRV_VERSION_MAJOR) "."		\
 	__stringify(DRV_VERSION_MINOR) "." __stringify(DRV_VERSION_BUILD)
 
-static int push_mode;
-module_param(push_mode, int, 0644);
-MODULE_PARM_DESC(push_mode, "Low latency mode: 0=disabled (default), 1=enabled)");
-
 static int debug;
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "debug flags: 0=disabled (default), 0x7fffffff=all");

@@ -1584,7 +1580,6 @@ static enum i40iw_status_code i40iw_setu
 	if (status)
 		goto exit;
 	iwdev->obj_next = iwdev->obj_mem;
-	iwdev->push_mode = push_mode;
 
 	init_waitqueue_head(&iwdev->vchnl_waitq);
 	init_waitqueue_head(&dev->vf_reqs);

@@ -201,38 +201,16 @@ static int i40iw_dealloc_ucontext(struct
  */
 static int i40iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 {
-	struct i40iw_ucontext *ucontext;
-	u64 db_addr_offset;
-	u64 push_offset;
+	struct i40iw_ucontext *ucontext = to_ucontext(context);
+	u64 dbaddr;
 
-	ucontext = to_ucontext(context);
-	if (ucontext->iwdev->sc_dev.is_pf) {
-		db_addr_offset = I40IW_DB_ADDR_OFFSET;
-		push_offset = I40IW_PUSH_OFFSET;
-		if (vma->vm_pgoff)
-			vma->vm_pgoff += I40IW_PF_FIRST_PUSH_PAGE_INDEX - 1;
-	} else {
-		db_addr_offset = I40IW_VF_DB_ADDR_OFFSET;
-		push_offset = I40IW_VF_PUSH_OFFSET;
-		if (vma->vm_pgoff)
-			vma->vm_pgoff += I40IW_VF_FIRST_PUSH_PAGE_INDEX - 1;
-	}
+	if (vma->vm_pgoff || vma->vm_end - vma->vm_start != PAGE_SIZE)
+		return -EINVAL;
 
-	vma->vm_pgoff += db_addr_offset >> PAGE_SHIFT;
+	dbaddr = I40IW_DB_ADDR_OFFSET + pci_resource_start(ucontext->iwdev->ldev->pcidev, 0);
 
-	if (vma->vm_pgoff == (db_addr_offset >> PAGE_SHIFT)) {
-		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-		vma->vm_private_data = ucontext;
-	} else {
-		if ((vma->vm_pgoff - (push_offset >> PAGE_SHIFT)) % 2)
-			vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-		else
-			vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
-	}
-
-	if (io_remap_pfn_range(vma, vma->vm_start,
-			       vma->vm_pgoff + (pci_resource_start(ucontext->iwdev->ldev->pcidev, 0) >> PAGE_SHIFT),
-			       PAGE_SIZE, vma->vm_page_prot))
+	if (io_remap_pfn_range(vma, vma->vm_start, dbaddr >> PAGE_SHIFT, PAGE_SIZE,
+			       pgprot_noncached(vma->vm_page_prot)))
 		return -EAGAIN;
 
 	return 0;

Hi!

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-4.19.y

Best regards,
Pavel

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

Thanks for testing this one and letting me know.

greg k-h

Results from Linaro’s test farm.
No regressions on arm64, arm, x86_64, and i386.

Summary
------------------------------------------------------------------------

kernel: 4.19.162-rc1
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git branch: linux-4.19.y
git commit: 35a4debf26a46be2487f7401acf73ae8b7a4a3f1
git describe: v4.19.161-33-g35a4debf26a4
Test details: https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-4.19.y/build/v4.19.161-33-g35a4debf26a4

No regressions (compared to build v4.19.161)

No fixes (compared to build v4.19.161)

Ran 42661 total tests in the following environments and test suites.

Environments
--------------
- arm
- arm64
- dragonboard-410c - arm64
- hi6220-hikey - arm64
- i386
- juno-r2 - arm64
- juno-r2-compat
- juno-r2-kasan
- mips
- nxp-ls2088
- qemu-arm64-clang
- qemu-arm64-kasan
- qemu-x86_64-clang
- qemu-x86_64-kasan
- qemu_arm
- qemu_arm64
- qemu_arm64-compat
- qemu_i386
- qemu_x86_64
- qemu_x86_64-compat
- s390
- sparc
- x15 - arm
- x86_64
- x86-kasan

Test Suites
-----------
* build
* linux-log-parser
* ltp-cap_bounds-tests
* ltp-cpuhotplug-tests
* ltp-crypto-tests
* ltp-dio-tests
* ltp-io-tests
* ltp-nptl-tests
* ltp-pty-tests
* ltp-securebits-tests
* ltp-syscalls-tests
* v4l2-compliance
* install-android-platform-tools-r2600
* libhugetlbfs
* ltp-commands-tests
* ltp-containers-tests
* ltp-fcntl-locktests-tests
* ltp-filecaps-tests
* ltp-fs_bind-tests
* ltp-fs_perms_simple-tests
* ltp-fsx-tests
* ltp-hugetlb-tests
* ltp-ipc-tests
* ltp-math-tests
* ltp-mm-tests
* ltp-sched-tests
* ltp-tracing-tests
* network-basic-tests
* perf
* kselftest
* ltp-controllers-tests
* ltp-cve-tests
* ltp-fs-tests
* ltp-open-posix-tests
* kvm-unit-tests
* kselftest-vsyscall-mode-native
* kselftest-vsyscall-mode-none

Linaro LKFT
https://lkft.linaro.org

All tests passing for Tegra ...

Test results for stable-v4.19:

    15 builds:	15 pass, 0 fail
    22 boots:	22 pass, 0 fail
    38 tests:	38 pass, 0 fail

Linux version: 4.19.162-rc1-g35a4debf26a4
Boards tested: tegra124-jetson-tk1, tegra186-p2771-0000,

                tegra194-p2972-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra30-cardhu-a04

Jon

Build results:

	total: 155 pass: 155 fail: 0
Qemu test results:
	total: 417 pass: 417 fail: 0

Guenter