4.4.265-rc1 review

This is the start of the stable review cycle for the 4.4.265 release. There are 28 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 Wed, 07 Apr 2021 08:50:09 +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-4.4.265-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-4.4.y
and the diffstat can be found below.

thanks,

greg k-h

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

Greg Kroah-Hartman <[email protected]>

    Linux 4.4.265-rc1

Atul Gopinathan <[email protected]>
staging: rtl8192e: Change state information from u16 to u8

Atul Gopinathan <[email protected]>
staging: rtl8192e: Fix incorrect source in memcpy()

Johan Hovold <[email protected]>
USB: cdc-acm: fix use-after-free after probe failure

Oliver Neukum <[email protected]>
USB: cdc-acm: downgrade message to debug

Oliver Neukum <[email protected]>
cdc-acm: fix BREAK rx code path adding necessary calls

Vincent Palatin <[email protected]>
USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem

Zheyu Ma <[email protected]>
firewire: nosy: Fix a use-after-free bug in nosy_ioctl()

Dinghao Liu <[email protected]>
extcon: Fix error handling in extcon_dev_register

Wang Panzhenzhuan <[email protected]>
pinctrl: rockchip: fix restore error in resume

Tetsuo Handa <[email protected]>
reiserfs: update reiserfs_xattrs_initialized() condition

Ilya Lipnitskiy <[email protected]>
mm: fix race by making init_zero_pfn() early_initcall

Steven Rostedt (VMware) <[email protected]>
tracing: Fix stack trace event size

Hui Wang <[email protected]>
ALSA: hda/realtek: call alc_update_headset_mode() in hp_automute_hook

Ikjoon Jang <[email protected]>
ALSA: usb-audio: Apply sample rate quirk to Logitech Connect

Tong Zhang <[email protected]>
net: wan/lmc: unregister device when no matching device is found

Doug Brown <[email protected]>
appletalk: Fix skb allocation size in loopback case

zhangyi (F) <[email protected]>
ext4: do not iput inode under running transaction in ext4_rename()

Tong Zhang <[email protected]>
staging: comedi: cb_pcidas64: fix request_irq() warn

Tong Zhang <[email protected]>
staging: comedi: cb_pcidas: fix request_irq() warn

Alexey Dobriyan <[email protected]>
scsi: qla2xxx: Fix broken #endif placement

Lv Yunlong <[email protected]>
scsi: st: Fix a use after free in st_open()

Benjamin Rood <[email protected]>
ASoC: sgtl5000: set DAP_AVC_CTRL register to correct default value on probe

Hans de Goede <[email protected]>
ASoC: rt5651: Fix dac- and adc- vol-tlv values being off by a factor of 10

Hans de Goede <[email protected]>
ASoC: rt5640: Fix dac- and adc- vol-tlv values being off by a factor of 10

J. Bruce Fields <[email protected]>
rpc: fix NULL dereference on kmalloc failure

Zhaolong Zhang <[email protected]>
ext4: fix bh ref count on error paths

Jakub Kicinski <[email protected]>
ipv6: weaken the v4mapped source check

David Brazdil <[email protected]>
selinux: vsock: Set SID for socket returned by accept()

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

Diffstat:

 Makefile                                     |  4 ++--
 drivers/extcon/extcon.c                      |  1 +
 drivers/firewire/nosy.c                      |  9 ++++++--
 drivers/net/wan/lmc/lmc_main.c               |  2 ++
 drivers/pinctrl/pinctrl-rockchip.c           | 13 ++++++-----
 drivers/scsi/qla2xxx/qla_target.h            |  2 +-
 drivers/scsi/st.c                            |  2 +-
 drivers/staging/comedi/drivers/cb_pcidas.c   |  2 +-
 drivers/staging/comedi/drivers/cb_pcidas64.c |  2 +-
 drivers/staging/rtl8192e/rtllib.h            |  2 +-
 drivers/staging/rtl8192e/rtllib_rx.c         |  2 +-
 drivers/usb/class/cdc-acm.c                  | 12 ++++++++--
 drivers/usb/core/quirks.c                    |  4 ++++
 fs/ext4/inode.c                              |  6 ++---
 fs/ext4/namei.c                              | 18 +++++++--------
 fs/reiserfs/xattr.h                          |  2 +-
 kernel/trace/trace.c                         |  3 ++-
 mm/memory.c                                  |  2 +-
 net/appletalk/ddp.c                          | 33 ++++++++++++++++++----------
 net/dccp/ipv6.c                              |  5 +++++
 net/ipv6/ip6_input.c                         | 10 ---------
 net/ipv6/tcp_ipv6.c                          |  5 +++++
 net/sunrpc/auth_gss/svcauth_gss.c            | 11 ++++++----
 net/vmw_vsock/af_vsock.c                     |  1 +
 sound/pci/hda/patch_realtek.c                |  1 +
 sound/soc/codecs/rt5640.c                    |  4 ++--
 sound/soc/codecs/rt5651.c                    |  4 ++--
 sound/soc/codecs/sgtl5000.c                  |  2 +-
 sound/usb/quirks.c                           |  1 +
 29 files changed, 102 insertions(+), 63 deletions(-)

From: David Brazdil <[email protected]>

[ Upstream commit 1f935e8e72ec28dddb2dc0650b3b6626a293d94b ]

For AF_VSOCK, accept() currently returns sockets that are unlabelled. Other socket families derive the child's SID from the SID of the parent and the SID of the incoming packet. This is typically done as the connected socket is placed in the queue that accept() removes from.

Reuse the existing 'security_sk_clone' hook to copy the SID from the parent (server) socket to the child. There is no packet SID in this case.

---
 net/vmw_vsock/af_vsock.c | 1 +
 1 file changed, 1 insertion(+)

index cdd91a60b89a..8f5fec0956bd 100644
@@ -632,6 +632,7 @@ struct sock *__vsock_create(struct net *net,
 		vsk->trusted = psk->trusted;
 		vsk->owner = get_cred(psk->owner);
 		vsk->connect_timeout = psk->connect_timeout;
+		security_sk_clone(parent, sk);
 	} else {
 		vsk->trusted = ns_capable_noaudit(&init_user_ns, CAP_NET_ADMIN);
 		vsk->owner = get_current_cred();

2.30.1

From: Jakub Kicinski <[email protected]>

[ Upstream commit dcc32f4f183ab8479041b23a1525d48233df1d43 ]

This reverts commit 6af1799aaf3f1bc8defedddfa00df3192445bbf3.

Commit 6af1799aaf3f ("ipv6: drop incoming packets having a v4mapped source address") introduced an input check against v4mapped addresses. Use of such addresses on the wire is indeed questionable and not allowed on public Internet. As the commit pointed out

https://tools.ietf.org/html/draft-itojun-v6ops-v4mapped-harmful-02

lists potential issues.

Unfortunately there are applications which use v4mapped addresses, and breaking them is a clear regression. For example v4mapped addresses (or any semi-valid addresses, really) may be used for uni-direction event streams or packet export.

Since the issue which sparked the addition of the check was with TCP and request_socks in particular push the check down to TCPv6 and DCCP. This restores the ability to receive UDPv6 packets with v4mapped address as the source.

Keep using the IPSTATS_MIB_INHDRERRORS statistic to minimize the user-visible changes.

---
 net/dccp/ipv6.c      |  5 +++++
 net/ipv6/ip6_input.c | 10 ----------
 net/ipv6/tcp_ipv6.c  |  5 +++++
 3 files changed, 10 insertions(+), 10 deletions(-)

index 736cc95b5201..bb1a7405dc0e 100644
@@ -313,6 +313,11 @@ static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
 	if (!ipv6_unicast_destination(skb))
 		return 0;	/* discard, don't send a reset here */
 
+	if (ipv6_addr_v4mapped(&ipv6_hdr(skb)->saddr)) {
+		IP6_INC_STATS_BH(sock_net(sk), NULL, IPSTATS_MIB_INHDRERRORS);
+		return 0;
+	}
+
 	if (dccp_bad_service_code(sk, service)) {
 		dcb->dccpd_reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
 		goto drop;

index c83c0faf5ae9..9075acf081dd 100644
@@ -151,16 +151,6 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 	if (ipv6_addr_is_multicast(&hdr->saddr))
 		goto err;
 
-	/* While RFC4291 is not explicit about v4mapped addresses
-	 * in IPv6 headers, it seems clear linux dual-stack
-	 * model can not deal properly with these.
-	 * Security models could be fooled by ::ffff:127.0.0.1 for example.
-	 *
-	 * https://tools.ietf.org/html/draft-itojun-v6ops-v4mapped-harmful-02
-	 */
-	if (ipv6_addr_v4mapped(&hdr->saddr))
-		goto err;
-
 	skb->transport_header = skb->network_header + sizeof(*hdr);
 	IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
 

index b4ffcec732b4..53e15514d90d 100644
@@ -978,6 +978,11 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
 	if (!ipv6_unicast_destination(skb))
 		goto drop;
 
+	if (ipv6_addr_v4mapped(&ipv6_hdr(skb)->saddr)) {
+		IP6_INC_STATS_BH(sock_net(sk), NULL, IPSTATS_MIB_INHDRERRORS);
+		return 0;
+	}
+
 	return tcp_conn_request(&tcp6_request_sock_ops,
 				&tcp_request_sock_ipv6_ops, sk, skb);
 

2.30.1

From: Zhaolong Zhang <[email protected]>

[ Upstream commit c915fb80eaa6194fa9bd0a4487705cd5b0dda2f1 ]

__ext4_journalled_writepage should drop bhs' ref count on error paths

---
 fs/ext4/inode.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

index 4c32a484f8bc..6551f08e89a7 100644
@@ -1824,13 +1824,13 @@ static int __ext4_journalled_writepage(struct page *page,
 	if (!ret)
 		ret = err;
 
-	if (!ext4_has_inline_data(inode))
-		ext4_walk_page_buffers(NULL, page_bufs, 0, len,
-				       NULL, bput_one);
 	ext4_set_inode_state(inode, EXT4_STATE_JDATA);
 out:
 	unlock_page(page);
 out_no_pagelock:
+	if (!inline_data && page_bufs)
+		ext4_walk_page_buffers(NULL, page_bufs, 0, len,
+				       NULL, bput_one);
 	brelse(inode_bh);
 	return ret;
 }

2.30.1

From: J. Bruce Fields <[email protected]>

[ Upstream commit 0ddc942394013f08992fc379ca04cffacbbe3dae ]

I think this is unlikely but possible:

svc_authenticate sets rq_authop and calls svcauth_gss_accept. The kmalloc(sizeof(*svcdata), GFP_KERNEL) fails, leaving rq_auth_data NULL, and returning SVC_DENIED.

This causes svc_process_common to go to err_bad_auth, and eventually call svc_authorise. That calls ->release == svcauth_gss_release, which tries to dereference rq_auth_data.

---
 net/sunrpc/auth_gss/svcauth_gss.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

index 91263d6a103b..bb8b0ef5de82 100644
@@ -1697,11 +1697,14 @@ static int
 svcauth_gss_release(struct svc_rqst *rqstp)
 {
 	struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data;
-	struct rpc_gss_wire_cred *gc = &gsd->clcred;
+	struct rpc_gss_wire_cred *gc;
 	struct xdr_buf *resbuf = &rqstp->rq_res;
 	int stat = -EINVAL;
 	struct sunrpc_net *sn = net_generic(SVC_NET(rqstp), sunrpc_net_id);
 
+	if (!gsd)
+		goto out;
+	gc = &gsd->clcred;
 	if (gc->gc_proc != RPC_GSS_PROC_DATA)
 		goto out;
 	/* Release can be called twice, but we only wrap once. */

@@ -1742,10 +1745,10 @@ out_err:
 	if (rqstp->rq_cred.cr_group_info)
 		put_group_info(rqstp->rq_cred.cr_group_info);
 	rqstp->rq_cred.cr_group_info = NULL;
-	if (gsd->rsci)
+	if (gsd && gsd->rsci) {
 		cache_put(&gsd->rsci->h, sn->rsc_cache);
-	gsd->rsci = NULL;
-
+		gsd->rsci = NULL;
+	}
 	return stat;
 }
 

2.30.1

From: Hans de Goede <[email protected]>

[ Upstream commit cfa26ed1f9f885c2fd8f53ca492989d1e16d0199 ]

The adc_vol_tlv volume-control has a range from -17.625 dB to +30 dB, not -176.25 dB to + 300 dB. This wrong scale is esp. a problem in userspace apps which translate the dB scale to a linear scale. With the logarithmic dB scale being of by a factor of 10 we loose all precision in the lower area of the range when apps translate things to a linear scale.

E.g. the 0 dB default, which corresponds with a value of 47 of the 0 - 127 range for the control, would be shown as 0/100 in alsa-mixer.

Since the centi-dB values used in the TLV struct cannot represent the 0.375 dB step size used by these controls, change the TLV definition for them to specify a min and max value instead of min + stepsize.

Note this mirrors commit 3f31f7d9b540 ("ASoC: rt5670: Fix dac- and adc- vol-tlv values being off by a factor of 10") which made the exact same change to the rt5670 codec driver.

---
 sound/soc/codecs/rt5640.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index b1c8bb39cdf1..db7734e45dd1 100644
@@ -341,9 +341,9 @@ static bool rt5640_readable_register(struct device *dev, unsigned int reg)
 }
 
 static const DECLARE_TLV_DB_SCALE(out_vol_tlv, -4650, 150, 0);
-static const DECLARE_TLV_DB_SCALE(dac_vol_tlv, -65625, 375, 0);
+static const DECLARE_TLV_DB_MINMAX(dac_vol_tlv, -6562, 0);
 static const DECLARE_TLV_DB_SCALE(in_vol_tlv, -3450, 150, 0);
-static const DECLARE_TLV_DB_SCALE(adc_vol_tlv, -17625, 375, 0);
+static const DECLARE_TLV_DB_MINMAX(adc_vol_tlv, -1762, 3000);
 static const DECLARE_TLV_DB_SCALE(adc_bst_tlv, 0, 1200, 0);
 
 /* {0, +20, +24, +30, +35, +40, +44, +50, +52} dB */

2.30.1

From: Hans de Goede <[email protected]>

[ Upstream commit eee51df776bd6cac10a76b2779a9fdee3f622b2b ]

The adc_vol_tlv volume-control has a range from -17.625 dB to +30 dB, not -176.25 dB to + 300 dB. This wrong scale is esp. a problem in userspace apps which translate the dB scale to a linear scale. With the logarithmic dB scale being of by a factor of 10 we loose all precision in the lower area of the range when apps translate things to a linear scale.

E.g. the 0 dB default, which corresponds with a value of 47 of the 0 - 127 range for the control, would be shown as 0/100 in alsa-mixer.

Since the centi-dB values used in the TLV struct cannot represent the 0.375 dB step size used by these controls, change the TLV definition for them to specify a min and max value instead of min + stepsize.

Note this mirrors commit 3f31f7d9b540 ("ASoC: rt5670: Fix dac- and adc- vol-tlv values being off by a factor of 10") which made the exact same change to the rt5670 codec driver.

---
 sound/soc/codecs/rt5651.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 1d4031818966..883b93f0bd38 100644
@@ -286,9 +286,9 @@ static bool rt5651_readable_register(struct device *dev, unsigned int reg)
 }
 
 static const DECLARE_TLV_DB_SCALE(out_vol_tlv, -4650, 150, 0);
-static const DECLARE_TLV_DB_SCALE(dac_vol_tlv, -65625, 375, 0);
+static const DECLARE_TLV_DB_MINMAX(dac_vol_tlv, -6562, 0);
 static const DECLARE_TLV_DB_SCALE(in_vol_tlv, -3450, 150, 0);
-static const DECLARE_TLV_DB_SCALE(adc_vol_tlv, -17625, 375, 0);
+static const DECLARE_TLV_DB_MINMAX(adc_vol_tlv, -1762, 3000);
 static const DECLARE_TLV_DB_SCALE(adc_bst_tlv, 0, 1200, 0);
 
 /* {0, +20, +24, +30, +35, +40, +44, +50, +52} dB */

2.30.1

From: Benjamin Rood <[email protected]>

[ Upstream commit f86f58e3594fb0ab1993d833d3b9a2496f3c928c ]

According to the SGTL5000 datasheet [1], the DAP_AVC_CTRL register has the following bit field definitions:

| BITS  | FIELD       | RW | RESET | DEFINITION                        |
| 15    | RSVD        | RO | 0x0   | Reserved                          |
| 14    | RSVD        | RW | 0x1   | Reserved                          |
| 13:12 | MAX_GAIN    | RW | 0x1   | Max Gain of AVC in expander mode  |
| 11:10 | RSVD        | RO | 0x0   | Reserved                          |
| 9:8   | LBI_RESP    | RW | 0x1   | Integrator Response               |
| 7:6   | RSVD        | RO | 0x0   | Reserved                          |
| 5     | HARD_LMT_EN | RW | 0x0   | Enable hard limiter mode          |
| 4:1   | RSVD        | RO | 0x0   | Reserved                          |
| 0     | EN          | RW | 0x0   | Enable/Disable AVC                |

The original default value written to the DAP_AVC_CTRL register during sgtl5000_i2c_probe() was 0x0510. This would incorrectly write values to bits 4 and 10, which are defined as RESERVED. It would also not set bits 12 and 14 to their correct RESET values of 0x1, and instead set them to 0x0. While the DAP_AVC module is effectively disabled because the EN bit is 0, this default value is still writing invalid values to registers that are marked as read-only and RESERVED as well as not setting bits 12 and 14 to their correct default values as defined by the datasheet.

The correct value that should be written to the DAP_AVC_CTRL register is 0x5100, which configures the register bits to the default values defined by the datasheet, and prevents any writes to bits defined as 'read-only'. Generally speaking, it is best practice to NOT attempt to write values to registers/bits defined as RESERVED, as it generally produces unwanted/undefined behavior, or errors.

Also, all credit for this patch should go to my colleague Dan MacDonald <[email protected]> for finding this error in the first place.

[1] https://www.nxp.com/docs/en/data-sheet/SGTL5000.pdf

---
 sound/soc/codecs/sgtl5000.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index a3dd7030f629..321b1ac52bfd 100644
@@ -78,7 +78,7 @@ static const struct reg_default sgtl5000_reg_defaults[] = {
 	{ SGTL5000_DAP_EQ_BASS_BAND4,		0x002f },
 	{ SGTL5000_DAP_MAIN_CHAN,		0x8000 },
 	{ SGTL5000_DAP_MIX_CHAN,		0x0000 },
-	{ SGTL5000_DAP_AVC_CTRL,		0x0510 },
+	{ SGTL5000_DAP_AVC_CTRL,		0x5100 },
 	{ SGTL5000_DAP_AVC_THRESHOLD,		0x1473 },
 	{ SGTL5000_DAP_AVC_ATTACK,		0x0028 },
 	{ SGTL5000_DAP_AVC_DECAY,		0x0050 },

2.30.1

From: Lv Yunlong <[email protected]>

[ Upstream commit c8c165dea4c8f5ad67b1240861e4f6c5395fa4ac ]

In st_open(), if STp->in_use is true, STp will be freed by scsi_tape_put(). However, STp is still used by DEBC_printk() after. It is better to DEBC_printk() before scsi_tape_put().

---
 drivers/scsi/st.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 088a68ab4246..3a3876091a9d 100644
@@ -1267,8 +1267,8 @@ static int st_open(struct inode *inode, struct file *filp)
 	spin_lock(&st_use_lock);
 	if (STp->in_use) {
 		spin_unlock(&st_use_lock);
-		scsi_tape_put(STp);
 		DEBC_printk(STp, "Device already in use.\n");
+		scsi_tape_put(STp);
 		return (-EBUSY);
 	}
 

2.30.1

From: Alexey Dobriyan <[email protected]>

[ Upstream commit 5999b9e5b1f8a2f5417b755130919b3ac96f5550 ]

Only half of the file is under include guard because terminating #endif is placed too early.

---
 drivers/scsi/qla2xxx/qla_target.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index bca584ae45b7..7a6fafa8ba56 100644
@@ -112,7 +112,6 @@
 	(min(1270, ((ql) > 0) ? (QLA_TGT_DATASEGS_PER_CMD_24XX + \
 		QLA_TGT_DATASEGS_PER_CONT_24XX*((ql) - 1)) : 0))
 #endif
-#endif
 
 #define GET_TARGET_ID(ha, iocb) ((HAS_EXTENDED_IDS(ha))			\
 			 ? le16_to_cpu((iocb)->u.isp2x.target.extended)	\

@@ -323,6 +322,7 @@ struct ctio_to_2xxx {
 #ifndef CTIO_RET_TYPE
 #define CTIO_RET_TYPE	0x17		/* CTIO return entry */
 #define ATIO_TYPE7 0x06 /* Accept target I/O entry for 24xx */
+#endif
 
 struct fcp_hdr {
 	uint8_t  r_ctl;

2.30.1

From: Tong Zhang <[email protected]>

[ Upstream commit 2e5848a3d86f03024ae096478bdb892ab3d79131 ]

request_irq() wont accept a name which contains slash so we need to repalce it with something else -- otherwise it will trigger a warning and the entry in /proc/irq/ will not be created
since the .name might be used by userspace and we don't want to break userspace, so we are changing the parameters passed to request_irq()

[    1.630764] name 'pci-das1602/16'
[    1.630950] WARNING: CPU: 0 PID: 181 at fs/proc/generic.c:180 __xlate_proc_name+0x93/0xb0
[    1.634009] RIP: 0010:__xlate_proc_name+0x93/0xb0
[    1.639441] Call Trace:
[    1.639976]  proc_mkdir+0x18/0x20
[    1.641946]  request_threaded_irq+0xfe/0x160
[    1.642186]  cb_pcidas_auto_attach+0xf4/0x610 [cb_pcidas]

---
 drivers/staging/comedi/drivers/cb_pcidas.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 3ea15bb0e56e..15b9cc8531f0 100644
@@ -1290,7 +1290,7 @@ static int cb_pcidas_auto_attach(struct comedi_device *dev,
 	     devpriv->amcc + AMCC_OP_REG_INTCSR);
 
 	ret = request_irq(pcidev->irq, cb_pcidas_interrupt, IRQF_SHARED,
-			  dev->board_name, dev);
+			  "cb_pcidas", dev);
 	if (ret) {
 		dev_dbg(dev->class_dev, "unable to allocate irq %d\n",
 			pcidev->irq);

2.30.1

From: Tong Zhang <[email protected]>

[ Upstream commit d2d106fe3badfc3bf0dd3899d1c3f210c7203eab ]

request_irq() wont accept a name which contains slash so we need to repalce it with something else -- otherwise it will trigger a warning and the entry in /proc/irq/ will not be created
since the .name might be used by userspace and we don't want to break userspace, so we are changing the parameters passed to request_irq()

[    1.565966] name 'pci-das6402/16'
[    1.566149] WARNING: CPU: 0 PID: 184 at fs/proc/generic.c:180 __xlate_proc_name+0x93/0xb0
[    1.568923] RIP: 0010:__xlate_proc_name+0x93/0xb0
[    1.574200] Call Trace:
[    1.574722]  proc_mkdir+0x18/0x20
[    1.576629]  request_threaded_irq+0xfe/0x160
[    1.576859]  auto_attach+0x60a/0xc40 [cb_pcidas64]

---
 drivers/staging/comedi/drivers/cb_pcidas64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index d33b8fe872a7..93d8c0b06d55 100644
@@ -4040,7 +4040,7 @@ static int auto_attach(struct comedi_device *dev,
 	init_stc_registers(dev);
 
 	retval = request_irq(pcidev->irq, handle_interrupt, IRQF_SHARED,
-			     dev->board_name, dev);
+			     "cb_pcidas64", dev);
 	if (retval) {
 		dev_dbg(dev->class_dev, "unable to allocate irq %u\n",
 			pcidev->irq);

2.30.1

From: zhangyi (F) <[email protected]>

[ Upstream commit 5dccdc5a1916d4266edd251f20bbbb113a5c495f ]

In ext4_rename(), when RENAME_WHITEOUT failed to add new entry into directory, it ends up dropping new created whiteout inode under the running transaction. After commit <9b88f9fb0d2> ("ext4: Do not iput inode under running transaction"), we follow the assumptions that evict() does not get called from a transaction context but in ext4_rename() it breaks this suggestion. Although it's not a real problem, better to obey it, so this patch add inode to orphan list and stop transaction before final iput().

---
 fs/ext4/namei.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

index 6168bcdadeba..f22fcb393684 100644
@@ -3554,7 +3554,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 	 */
 	retval = -ENOENT;
 	if (!old.bh || le32_to_cpu(old.de->inode) != old.inode->i_ino)
-		goto end_rename;
+		goto release_bh;
 
 	if ((old.dir != new.dir) &&
 	    ext4_encrypted_inode(new.dir) &&

@@ -3569,7 +3569,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 	if (IS_ERR(new.bh)) {
 		retval = PTR_ERR(new.bh);
 		new.bh = NULL;
-		goto end_rename;
+		goto release_bh;
 	}
 	if (new.bh) {
 		if (!new.inode) {

@@ -3586,15 +3586,13 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
 		handle = ext4_journal_start(old.dir, EXT4_HT_DIR, credits);
 		if (IS_ERR(handle)) {
 			retval = PTR_ERR(handle);
-			handle = NULL;
-			goto end_rename;
+			goto release_bh;
 		}
 	} else {
 		whiteout = ext4_whiteout_for_rename(&old, credits, &handle);
 		if (IS_ERR(whiteout)) {
 			retval = PTR_ERR(whiteout);
-			whiteout = NULL;
-			goto end_rename;
+			goto release_bh;
 		}
 	}
 

@@ -3702,16 +3700,18 @@ end_rename:
 			ext4_resetent(handle, &old,
 				      old.inode->i_ino, old_file_type);
 			drop_nlink(whiteout);
+			ext4_orphan_add(handle, whiteout);
 		}
 		unlock_new_inode(whiteout);
+		ext4_journal_stop(handle);
 		iput(whiteout);
-
+	} else {
+		ext4_journal_stop(handle);
 	}
+release_bh:
 	brelse(old.dir_bh);
 	brelse(old.bh);
 	brelse(new.bh);
-	if (handle)
-		ext4_journal_stop(handle);
 	return retval;
 }
 

2.30.1

From: Doug Brown <[email protected]>

[ Upstream commit 39935dccb21c60f9bbf1bb72d22ab6fd14ae7705 ]

If a DDP broadcast packet is sent out to a non-gateway target, it is also looped back. There is a potential for the loopback device to have a longer hardware header length than the original target route's device, which can result in the skb not being created with enough room for the loopback device's hardware header. This patch fixes the issue by determining that a loopback will be necessary prior to allocating the skb, and if so, ensuring the skb has enough room.

This was discovered while testing a new driver that creates a LocalTalk network interface (LTALK_HLEN = 1). It caused an skb_under_panic.

---
 net/appletalk/ddp.c | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

index ace94170f55e..1048cddcc9a3 100644
@@ -1575,8 +1575,8 @@ static int atalk_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 	struct sk_buff *skb;
 	struct net_device *dev;
 	struct ddpehdr *ddp;
-	int size;
-	struct atalk_route *rt;
+	int size, hard_header_len;
+	struct atalk_route *rt, *rt_lo = NULL;
 	int err;
 
 	if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))

@@ -1639,7 +1639,22 @@ static int atalk_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 	SOCK_DEBUG(sk, "SK %p: Size needed %d, device %s\n",
 			sk, size, dev->name);
 
-	size += dev->hard_header_len;
+	hard_header_len = dev->hard_header_len;
+	/* Leave room for loopback hardware header if necessary */
+	if (usat->sat_addr.s_node == ATADDR_BCAST &&
+	    (dev->flags & IFF_LOOPBACK || !(rt->flags & RTF_GATEWAY))) {
+		struct atalk_addr at_lo;
+
+		at_lo.s_node = 0;
+		at_lo.s_net  = 0;
+
+		rt_lo = atrtr_find(&at_lo);
+
+		if (rt_lo && rt_lo->dev->hard_header_len > hard_header_len)
+			hard_header_len = rt_lo->dev->hard_header_len;
+	}
+
+	size += hard_header_len;
 	release_sock(sk);
 	skb = sock_alloc_send_skb(sk, size, (flags & MSG_DONTWAIT), &err);
 	lock_sock(sk);

@@ -1647,7 +1662,7 @@ static int atalk_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 		goto out;
 
 	skb_reserve(skb, ddp_dl->header_length);
-	skb_reserve(skb, dev->hard_header_len);
+	skb_reserve(skb, hard_header_len);
 	skb->dev = dev;
 
 	SOCK_DEBUG(sk, "SK %p: Begin build.\n", sk);

@@ -1698,18 +1713,12 @@ static int atalk_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 		/* loop back */
 		skb_orphan(skb);
 		if (ddp->deh_dnode == ATADDR_BCAST) {
-			struct atalk_addr at_lo;
-
-			at_lo.s_node = 0;
-			at_lo.s_net  = 0;
-
-			rt = atrtr_find(&at_lo);
-			if (!rt) {
+			if (!rt_lo) {
 				kfree_skb(skb);
 				err = -ENETUNREACH;
 				goto out;
 			}
-			dev = rt->dev;
+			dev = rt_lo->dev;
 			skb->dev = dev;
 		}
 		ddp_dl->request(ddp_dl, skb, dev->dev_addr);

2.30.1

From: Tong Zhang <[email protected]>

[ Upstream commit 62e69bc419772638369eff8ff81340bde8aceb61 ]

lmc set sc->lmc_media pointer when there is a matching device. However, when no matching device is found, this pointer is NULL and the following dereference will result in a null-ptr-deref.

To fix this issue, unregister the hdlc device and return an error.

[    4.569359] BUG: KASAN: null-ptr-deref in lmc_init_one.cold+0x2b6/0x55d [lmc]
[    4.569748] Read of size 8 at addr 0000000000000008 by task modprobe/95
[    4.570102]
[    4.570187] CPU: 0 PID: 95 Comm: modprobe Not tainted 5.11.0-rc7 #94
[    4.570527] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-48-gd9c812dda519-preb4
[    4.571125] Call Trace:
[    4.571261]  dump_stack+0x7d/0xa3
[    4.571445]  kasan_report.cold+0x10c/0x10e
[    4.571667]  ? lmc_init_one.cold+0x2b6/0x55d [lmc]
[    4.571932]  lmc_init_one.cold+0x2b6/0x55d [lmc]
[    4.572186]  ? lmc_mii_readreg+0xa0/0xa0 [lmc]
[    4.572432]  local_pci_probe+0x6f/0xb0
[    4.572639]  pci_device_probe+0x171/0x240
[    4.572857]  ? pci_device_remove+0xe0/0xe0
[    4.573080]  ? kernfs_create_link+0xb6/0x110
[    4.573315]  ? sysfs_do_create_link_sd.isra.0+0x76/0xe0
[    4.573598]  really_probe+0x161/0x420
[    4.573799]  driver_probe_device+0x6d/0xd0
[    4.574022]  device_driver_attach+0x82/0x90
[    4.574249]  ? device_driver_attach+0x90/0x90
[    4.574485]  __driver_attach+0x60/0x100
[    4.574694]  ? device_driver_attach+0x90/0x90
[    4.574931]  bus_for_each_dev+0xe1/0x140
[    4.575146]  ? subsys_dev_iter_exit+0x10/0x10
[    4.575387]  ? klist_node_init+0x61/0x80
[    4.575602]  bus_add_driver+0x254/0x2a0
[    4.575812]  driver_register+0xd3/0x150
[    4.576021]  ? 0xffffffffc0018000
[    4.576202]  do_one_initcall+0x84/0x250
[    4.576411]  ? trace_event_raw_event_initcall_finish+0x150/0x150
[    4.576733]  ? unpoison_range+0xf/0x30
[    4.576938]  ? ____kasan_kmalloc.constprop.0+0x84/0xa0
[    4.577219]  ? unpoison_range+0xf/0x30
[    4.577423]  ? unpoison_range+0xf/0x30
[    4.577628]  do_init_module+0xf8/0x350
[    4.577833]  load_module+0x3fe6/0x4340
[    4.578038]  ? vm_unmap_ram+0x1d0/0x1d0
[    4.578247]  ? ____kasan_kmalloc.constprop.0+0x84/0xa0
[    4.578526]  ? module_frob_arch_sections+0x20/0x20
[    4.578787]  ? __do_sys_finit_module+0x108/0x170
[    4.579037]  __do_sys_finit_module+0x108/0x170
[    4.579278]  ? __ia32_sys_init_module+0x40/0x40
[    4.579523]  ? file_open_root+0x200/0x200
[    4.579742]  ? do_sys_open+0x85/0xe0
[    4.579938]  ? filp_open+0x50/0x50
[    4.580125]  ? exit_to_user_mode_prepare+0xfc/0x130
[    4.580390]  do_syscall_64+0x33/0x40
[    4.580586]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    4.580859] RIP: 0033:0x7f1a724c3cf7
[    4.581054] Code: 48 89 57 30 48 8b 04 24 48 89 47 38 e9 1d a0 02 00 48 89 f8 48 89 f7 48 89 d6 48 891
[    4.582043] RSP: 002b:00007fff44941c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    4.582447] RAX: ffffffffffffffda RBX: 00000000012ada70 RCX: 00007f1a724c3cf7
[    4.582827] RDX: 0000000000000000 RSI: 00000000012ac9e0 RDI: 0000000000000003
[    4.583207] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
[    4.583587] R10: 00007f1a72527300 R11: 0000000000000246 R12: 00000000012ac9e0
[    4.583968] R13: 0000000000000000 R14: 00000000012acc90 R15: 0000000000000001
[    4.584349] ==================================================================

---
 drivers/net/wan/lmc/lmc_main.c | 2 ++
 1 file changed, 2 insertions(+)

index c178e1218347..88cf948ce8d4 100644
@@ -926,6 +926,8 @@ static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
         break;
     default:
 	printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
+	unregister_hdlc_device(dev);
+	return -EIO;
         break;
     }
 

2.30.1

From: Ikjoon Jang <[email protected]>

commit 625bd5a616ceda4840cd28f82e957c8ced394b6a upstream.

Logitech ConferenceCam Connect is a compound USB device with UVC and UAC. Not 100% reproducible but sometimes it keeps responding STALL to every control transfer once it receives get_freq request.

This patch adds 046d:0x084c to a snd_usb_get_sample_rate_quirk list.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=203419

---
 sound/usb/quirks.c |    1 +
 1 file changed, 1 insertion(+)

@@ -1155,6 +1155,7 @@ bool snd_usb_get_sample_rate_quirk(struc
 	case USB_ID(0x21B4, 0x0081): /* AudioQuest DragonFly */
 	case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */
 	case USB_ID(0x413c, 0xa506): /* Dell AE515 sound bar */
+	case USB_ID(0x046d, 0x084c): /* Logitech ConferenceCam Connect */
 		return true;
 	}
 	return false;

From: Hui Wang <[email protected]>

commit e54f30befa7990b897189b44a56c1138c6bfdbb5 upstream.

We found the alc_update_headset_mode() is not called on some machines when unplugging the headset, as a result, the mode of the ALC_HEADSET_MODE_UNPLUGGED can't be set, then the current_headset_type is not cleared, if users plug a differnt type of headset next time, the determine_headset_type() will not be called and the audio jack is set to the headset type of previous time.

On the Dell machines which connect the dmic to the PCH, if we open the gnome-sound-setting and unplug the headset, this issue will happen. Those machines disable the auto-mute by ucm and has no internal mic in the input source, so the update_headset_mode() will not be called by cap_sync_hook or automute_hook when unplugging, and because the gnome-sound-setting is opened, the codec will not enter the runtime_suspend state, so the update_headset_mode() will not be called by alc_resume when unplugging. In this case the hp_automute_hook is called when unplugging, so add update_headset_mode() calling to this function.

---
 sound/pci/hda/patch_realtek.c |    1 +
 1 file changed, 1 insertion(+)

@@ -4294,6 +4294,7 @@ static void alc_update_headset_jack_cb(s
 	struct alc_spec *spec = codec->spec;
 	spec->current_headset_type = ALC_HEADSET_TYPE_UNKNOWN;
 	snd_hda_gen_hp_automute(codec, jack);
+	alc_update_headset_mode(codec);
 }
 
 static void alc_probe_headset_mode(struct hda_codec *codec)

From: Steven Rostedt (VMware) <[email protected]>

commit 9deb193af69d3fd6dd8e47f292b67c805a787010 upstream.

Commit cbc3b92ce037 fixed an issue to modify the macros of the stack trace event so that user space could parse it properly. Originally the stack trace format to user space showed that the called stack was a dynamic array. But it is not actually a dynamic array, in the way that other dynamic event arrays worked, and this broke user space parsing for it. The update was to make the array look to have 8 entries in it. Helper functions were added to make it parse it correctly, as the stack was dynamic, but was determined by the size of the event stored.

Although this fixed user space on how it read the event, it changed the internal structure used for the stack trace event. It changed the array size from [0] to [8] (added 8 entries). This increased the size of the stack trace event by 8 words. The size reserved on the ring buffer was the size of the stack trace event plus the number of stack entries found in the stack trace. That commit caused the amount to be 8 more than what was needed because it did not expect the caller field to have any size. This produced 8 entries of garbage (and reading random data) from the stack trace event:

          <idle>-0       [002] d... 1976396.837549: <stack trace>

=> trace_event_raw_event_sched_switch
=> __traceiter_sched_switch
=> __schedule
=> schedule_idle
=> do_idle
=> cpu_startup_entry
=> secondary_startup_64_no_verify
=> 0xc8c5e150ffff93de
=> 0xffff93de
=> 0
=> 0
=> 0xc8c5e17800000000
=> 0x1f30affff93de
=> 0x00000004
=> 0x200000000

Instead, subtract the size of the caller field from the size of the event to make sure that only the amount needed to store the stack trace is reserved.

---
 kernel/trace/trace.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -1867,7 +1867,8 @@ static void __ftrace_trace_stack(struct
 	size *= sizeof(unsigned long);
 
 	event = trace_buffer_lock_reserve(buffer, TRACE_STACK,
-					  sizeof(*entry) + size, flags, pc);
+				    (sizeof(*entry) - sizeof(entry->caller)) + size,
+				    flags, pc);
 	if (!event)
 		goto out;
 	entry = ring_buffer_event_data(event);

From: Ilya Lipnitskiy <[email protected]>

commit e720e7d0e983bf05de80b231bccc39f1487f0f16 upstream.

There are code paths that rely on zero_pfn to be fully initialized before core_initcall. For example, wq_sysfs_init() is a core_initcall function that eventually results in a call to kernel_execve, which causes a page fault with a subsequent mmput. If zero_pfn is not initialized by then it may not get cleaned up properly and result in an error:

  BUG: Bad rss-counter state mm:(ptrval) type:MM_ANONPAGES val:1

Here is an analysis of the race as seen on a MIPS device. On this particular MT7621 device (Ubiquiti ER-X), zero_pfn is PFN 0 until initialized, at which point it becomes PFN 5120:

1. wq_sysfs_init calls into kobject_uevent_env at core_initcall:

       kobject_uevent_env+0x7e4/0x7ec
       kset_register+0x68/0x88
       bus_register+0xdc/0x34c
       subsys_virtual_register+0x34/0x78
       wq_sysfs_init+0x1c/0x4c
       do_one_initcall+0x50/0x1a8
       kernel_init_freeable+0x230/0x2c8
       kernel_init+0x10/0x100
       ret_from_kernel_thread+0x14/0x1c

2. kobject_uevent_env() calls call_usermodehelper_exec() which executes kernel_execve asynchronously.

3. Memory allocations in kernel_execve cause a page fault, bumping the

     MM reference counter:
       add_mm_counter_fast+0xb4/0xc0
       handle_mm_fault+0x6e4/0xea0
       __get_user_pages.part.78+0x190/0x37c
       __get_user_pages_remote+0x128/0x360
       get_arg_page+0x34/0xa0
       copy_string_kernel+0x194/0x2a4
       kernel_execve+0x11c/0x298
       call_usermodehelper_exec_async+0x114/0x194

4. In case zero_pfn has not been initialized yet, zap_pte_range does

     not decrement the MM_ANONPAGES RSS counter and the BUG message is
     triggered shortly afterwards when __mmdrop checks the ref counters:
       __mmdrop+0x98/0x1d0
       free_bprm+0x44/0x118
       kernel_execve+0x160/0x1d8
       call_usermodehelper_exec_async+0x114/0x194
       ret_from_kernel_thread+0x14/0x1c

To avoid races such as described above, initialize init_zero_pfn at early_initcall level. Depending on the architecture, ZERO_PAGE is either constant or gets initialized even earlier, at paging_init, so there is no issue with initializing zero_pfn earlier.

---
 mm/memory.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -129,7 +129,7 @@ static int __init init_zero_pfn(void)
 	zero_pfn = page_to_pfn(ZERO_PAGE(0));
 	return 0;
 }
-core_initcall(init_zero_pfn);
+early_initcall(init_zero_pfn);
 
 
 #if defined(SPLIT_RSS_COUNTING)

From: Tetsuo Handa <[email protected]>

commit 5e46d1b78a03d52306f21f77a4e4a144b6d31486 upstream.

syzbot is reporting NULL pointer dereference at reiserfs_security_init() [1], for commit ab17c4f02156c4f7 ("reiserfs: fixup xattr_root caching") is assuming that REISERFS_SB(s)->xattr_root != NULL in reiserfs_xattr_jcreate_nblocks() despite that commit made REISERFS_SB(sb)->priv_root != NULL && REISERFS_SB(s)->xattr_root == NULL case possible.

I guess that commit 6cb4aff0a77cc0e6 ("reiserfs: fix oops while creating privroot with selinux enabled") wanted to check xattr_root != NULL before reiserfs_xattr_jcreate_nblocks(), for the changelog is talking about the xattr root.

The issue is that while creating the privroot during mount reiserfs_security_init calls reiserfs_xattr_jcreate_nblocks which dereferences the xattr root. The xattr root doesn't exist, so we get an oops.

Therefore, update reiserfs_xattrs_initialized() to check both the privroot and the xattr root.

---
 fs/reiserfs/xattr.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -42,7 +42,7 @@ void reiserfs_security_free(struct reise
 
 static inline int reiserfs_xattrs_initialized(struct super_block *sb)
 {
-	return REISERFS_SB(sb)->priv_root != NULL;
+	return REISERFS_SB(sb)->priv_root && REISERFS_SB(sb)->xattr_root;
 }
 
 #define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))

From: Wang Panzhenzhuan <[email protected]>

commit c971af25cda94afe71617790826a86253e88eab0 upstream.

The restore in resume should match to suspend which only set for RK3288 SoCs pinctrl.

---
 drivers/pinctrl/pinctrl-rockchip.c |   13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

@@ -1967,12 +1967,15 @@ static int __maybe_unused rockchip_pinct
 static int __maybe_unused rockchip_pinctrl_resume(struct device *dev)
 {
 	struct rockchip_pinctrl *info = dev_get_drvdata(dev);
-	int ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
-			       rk3288_grf_gpio6c_iomux |
-			       GPIO6C6_SEL_WRITE_ENABLE);
+	int ret;
 
-	if (ret)
-		return ret;
+	if (info->ctrl->type == RK3288) {
+		ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
+				   rk3288_grf_gpio6c_iomux |
+				   GPIO6C6_SEL_WRITE_ENABLE);
+		if (ret)
+			return ret;
+	}
 
 	return pinctrl_force_default(info->pctl_dev);
 }

From: Dinghao Liu <[email protected]>

[ Upstream commit d3bdd1c3140724967ca4136755538fa7c05c2b4e ]

When devm_kcalloc() fails, we should execute device_unregister() to unregister edev->dev from system.

---
 drivers/extcon/extcon.c | 1 +
 1 file changed, 1 insertion(+)

index 21a123cadf78..e7fef10bd12c 100644
@@ -932,6 +932,7 @@ int extcon_dev_register(struct extcon_dev *edev)
 			sizeof(*edev->nh) * edev->max_supported, GFP_KERNEL);
 	if (!edev->nh) {
 		ret = -ENOMEM;
+		device_unregister(&edev->dev);
 		goto err_dev;
 	}
 

2.30.2

From: Zheyu Ma <[email protected]>

[ Upstream commit 829933ef05a951c8ff140e814656d73e74915faf ]

For each device, the nosy driver allocates a pcilynx structure. A use-after-free might happen in the following scenario:

1. Open nosy device for the first time and call ioctl with command NOSY_IOC_START, then a new client A will be malloced and added to doubly linked list.
2. Open nosy device for the second time and call ioctl with command NOSY_IOC_START, then a new client B will be malloced and added to doubly linked list.
3. Call ioctl with command NOSY_IOC_START for client A, then client A will be readded to the doubly linked list. Now the doubly linked list is messed up.
4. Close the first nosy device and nosy_release will be called. In nosy_release, client A will be unlinked and freed.
5. Close the second nosy device, and client A will be referenced, resulting in UAF.

The root cause of this bug is that the element in the doubly linked list is reentered into the list.

Fix this bug by adding a check before inserting a client. If a client is already in the linked list, don't insert it.

The following KASAN report reveals it:

   BUG: KASAN: use-after-free in nosy_release+0x1ea/0x210
   Write of size 8 at addr ffff888102ad7360 by task poc
   CPU: 3 PID: 337 Comm: poc Not tainted 5.12.0-rc5+ #6
   Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
   Call Trace:
     nosy_release+0x1ea/0x210
     __fput+0x1e2/0x840
     task_work_run+0xe8/0x180
     exit_to_user_mode_prepare+0x114/0x120
     syscall_exit_to_user_mode+0x1d/0x40
     entry_SYSCALL_64_after_hwframe+0x44/0xae

   Allocated by task 337:
     nosy_open+0x154/0x4d0
     misc_open+0x2ec/0x410
     chrdev_open+0x20d/0x5a0
     do_dentry_open+0x40f/0xe80
     path_openat+0x1cf9/0x37b0
     do_filp_open+0x16d/0x390
     do_sys_openat2+0x11d/0x360
     __x64_sys_open+0xfd/0x1a0
     do_syscall_64+0x33/0x40
     entry_SYSCALL_64_after_hwframe+0x44/0xae

   Freed by task 337:
     kfree+0x8f/0x210
     nosy_release+0x158/0x210
     __fput+0x1e2/0x840
     task_work_run+0xe8/0x180
     exit_to_user_mode_prepare+0x114/0x120
     syscall_exit_to_user_mode+0x1d/0x40
     entry_SYSCALL_64_after_hwframe+0x44/0xae

   The buggy address belongs to the object at ffff888102ad7300 which belongs to the cache kmalloc-128 of size 128
   The buggy address is located 96 bytes inside of 128-byte region [ffff888102ad7300, ffff888102ad7380)

[ Modified to use 'list_empty()' inside proper lock - Linus ]

---
 drivers/firewire/nosy.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

index 76b2d390f6ec..40ed4d8c61f5 100644
@@ -358,6 +358,7 @@ nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	struct client *client = file->private_data;
 	spinlock_t *client_list_lock = &client->lynx->client_list_lock;
 	struct nosy_stats stats;
+	int ret;
 
 	switch (cmd) {
 	case NOSY_IOC_GET_STATS:

@@ -372,11 +373,15 @@ nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			return 0;
 
 	case NOSY_IOC_START:
+		ret = -EBUSY;
 		spin_lock_irq(client_list_lock);
-		list_add_tail(&client->link, &client->lynx->client_list);
+		if (list_empty(&client->link)) {
+			list_add_tail(&client->link, &client->lynx->client_list);
+			ret = 0;
+		}
 		spin_unlock_irq(client_list_lock);
 
-		return 0;
+		return ret;
 
 	case NOSY_IOC_STOP:
 		spin_lock_irq(client_list_lock);

2.30.2

From: Vincent Palatin <[email protected]>

commit 0bd860493f81eb2a46173f6f5e44cc38331c8dbd upstream.

This LTE modem (M.2 card) has a bug in its power management:
there is some kind of race condition for U3 wake-up between the host and the device. The modem firmware sometimes crashes/locks when both events happen at the same time and the modem fully drops off the USB bus (and sometimes re-enumerates, sometimes just gets stuck until the next reboot).

Tested with the modem wired to the XHCI controller on an AMD 3015Ce platform. Without the patch, the modem dropped of the USB bus 5 times in 3 days. With the quirk, it stayed connected for a week while the 'runtime_suspended_time' counter incremented as excepted.

---
 drivers/usb/core/quirks.c |    4 ++++
 1 file changed, 4 insertions(+)

@@ -321,6 +321,10 @@ static const struct usb_device_id usb_qu
 	/* DJI CineSSD */
 	{ USB_DEVICE(0x2ca3, 0x0031), .driver_info = USB_QUIRK_NO_LPM },
 
+	/* Fibocom L850-GL LTE Modem */
+	{ USB_DEVICE(0x2cb7, 0x0007), .driver_info =
+			USB_QUIRK_IGNORE_REMOTE_WAKEUP },
+
 	/* INTEL VALUE SSD */
 	{ USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },
 

From: Oliver Neukum <[email protected]>

commit 08dff274edda54310d6f1cf27b62fddf0f8d146e upstream.

Counting break events is nice but we should actually report them to the tty layer.

---
 drivers/usb/class/cdc-acm.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -334,8 +334,10 @@ static void acm_ctrl_irq(struct urb *urb
 			acm->iocount.dsr++;
 		if (difference & ACM_CTRL_DCD)
 			acm->iocount.dcd++;
-		if (newctrl & ACM_CTRL_BRK)
+		if (newctrl & ACM_CTRL_BRK) {
 			acm->iocount.brk++;
+			tty_insert_flip_char(&acm->port, 0, TTY_BREAK);
+		}
 		if (newctrl & ACM_CTRL_RI)
 			acm->iocount.rng++;
 		if (newctrl & ACM_CTRL_FRAMING)

From: Oliver Neukum <[email protected]>

commit e4c77070ad45fc940af1d7fb1e637c349e848951 upstream.

This failure is so common that logging an error here amounts to spamming log files.

---
 drivers/usb/class/cdc-acm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -550,7 +550,8 @@ static void acm_port_dtr_rts(struct tty_
 
 	res = acm_set_control(acm, val);
 	if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
-		dev_err(&acm->control->dev, "failed to set dtr/rts\n");
+		/* This is broken in too many devices to spam the logs */
+		dev_dbg(&acm->control->dev, "failed to set dtr/rts\n");
 }
 
 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)

From: Johan Hovold <[email protected]>

commit 4e49bf376c0451ad2eae2592e093659cde12be9a upstream.

If tty-device registration fails the driver would fail to release the data interface. When the device is later disconnected, the disconnect callback would still be called for the data interface and would go about releasing already freed resources.

---
 drivers/usb/class/cdc-acm.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -1502,6 +1502,11 @@ skip_countries:
 
 	return 0;
 alloc_fail8:
+	if (!acm->combined_interfaces) {
+		/* Clear driver data so that disconnect() returns early. */
+		usb_set_intfdata(data_interface, NULL);
+		usb_driver_release_interface(&acm_driver, data_interface);
+	}
 	if (acm->country_codes) {
 		device_remove_file(&acm->control->dev,
 				&dev_attr_wCountryCodes);

From: Atul Gopinathan <[email protected]>

commit 72ad25fbbb78930f892b191637359ab5b94b3190 upstream.

The variable "info_element" is of the following type:

struct rtllib_info_element *info_element

defined in drivers/staging/rtl8192e/rtllib.h:

	struct rtllib_info_element {
		u8 id;
		u8 len;
		u8 data[];
	} __packed;

The "len" field defines the size of the "data[]" array. The code is supposed to check if "info_element->len" is greater than 4 and later equal to 6. If this is satisfied then, the last two bytes (the 4th and 5th element of u8 "data[]" array) are copied into "network->CcxRmState".

Right now the code uses "memcpy()" with the source as "&info_element[4]" which would copy in wrong and unintended information. The struct "rtllib_info_element" has a size of 2 bytes for "id" and "len", therefore indexing will be done in interval of 2 bytes. So, "info_element[4]" would point to data which is beyond the memory allocated for this pointer (that is, at x+8, while "info_element" has been allocated only from x to x+7 (2 + 6 => 8 bytes)).

This patch rectifies this error by using "&info_element->data[4]" which correctly copies the last two bytes of "data[]".

NOTE: The faulty line of code came from the following commit:

commit ecdfa44610fa ("Staging: add Realtek 8192 PCI wireless driver")

The above commit created the file rtl8192e/ieee80211/ieee80211_rx.c which had the faulty line of code. This file has been deleted (or possibly renamed) with the contents copied in to a new file rtl8192e/rtllib_rx.c along with additional code in the commit 94a799425eee (tagged in Fixes).

---
 drivers/staging/rtl8192e/rtllib_rx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -1988,7 +1988,7 @@ static void rtllib_parse_mife_generic(st
 	    info_element->data[2] == 0x96 &&
 	    info_element->data[3] == 0x01) {
 		if (info_element->len == 6) {
-			memcpy(network->CcxRmState, &info_element[4], 2);
+			memcpy(network->CcxRmState, &info_element->data[4], 2);
 			if (network->CcxRmState[0] != 0)
 				network->bCcxRmEnable = true;
 			else

From: Atul Gopinathan <[email protected]>

commit e78836ae76d20f38eed8c8c67f21db97529949da upstream.

The "u16 CcxRmState[2];" array field in struct "rtllib_network" has 4 bytes in total while the operations performed on this array through-out the code base are only 2 bytes.

The "CcxRmState" field is fed only 2 bytes of data using memcpy():

(In rtllib_rx.c:1972)

	memcpy(network->CcxRmState, &info_element->data[4], 2)

With "info_element->data[]" being a u8 array, if 2 bytes are written into "CcxRmState" (whose one element is u16 size), then the 2 u8 elements from "data[]" gets squashed and written into the first element ("CcxRmState[0]") while the second element ("CcxRmState[1]") is never fed with any data.

Same in file rtllib_rx.c:2522:

	 memcpy(dst->CcxRmState, src->CcxRmState, 2);

The above line duplicates "src" data to "dst" but only writes 2 bytes (and not 4, which is the actual size). Again, only 1st element gets the value while the 2nd element remains uninitialized.

This later makes operations done with CcxRmState unpredictable in the following lines as the 1st element is having a squashed number while the 2nd element is having an uninitialized random number.

rtllib_rx.c:1973: if (network->CcxRmState[0] != 0)
rtllib_rx.c:1977: network->MBssidMask = network->CcxRmState[1] & 0x07;

network->MBssidMask is also of type u8 and not u16.

Fix this by changing the type of "CcxRmState" from u16 to u8 so that the data written into this array and read from it make sense and are not random values.

NOTE: The wrong initialization of "CcxRmState" can be seen in the following commit:

commit ecdfa44610fa ("Staging: add Realtek 8192 PCI wireless driver")

The above commit created a file rtl8192e/ieee80211.h which used to have the faulty line. The file has been deleted (or possibly renamed) with the contents copied in to a new file rtl8192e/rtllib.h along with additional code in the commit 94a799425eee (tagged in Fixes).

---
 drivers/staging/rtl8192e/rtllib.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -1160,7 +1160,7 @@ struct rtllib_network {
 	bool	bWithAironetIE;
 	bool	bCkipSupported;
 	bool	bCcxRmEnable;
-	u16	CcxRmState[2];
+	u8	CcxRmState[2];
 	bool	bMBssidValid;
 	u8	MBssidMask;
 	u8	MBssid[ETH_ALEN];

Build results:

	total: 160 pass: 160 fail: 0
Qemu test results:
	total: 328 pass: 328 fail: 0

Guenter

Compiled and booted on my test system. No dmesg regressions.

thanks,
-- Shuah

Thanks for testing all of these and letting me know

greg k-h

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

## Build
* kernel: 4.4.265-rc1
* git: ['https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git', 'https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc']
* git branch: linux-4.4.y
* git commit: 5bb7d387c8f89b4d3ff46f3e0ee3f0f00d026bde
* git describe: v4.4.264-29-g5bb7d387c8f8
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-4.4.y/build/v4.4.264-29-g5bb7d387c8f8

## No regressions (compared to v4.4.264-21-g8b29c729d1d8)

## Fixes (compared to v4.4.264-21-g8b29c729d1d8)
No fixes found.

## Test result summary
total: 44184, pass: 35929, fail: 472, skip: 7578, xfail: 205,

## Build Summary
* arm: 96 total, 96 passed, 0 failed
* arm64: 23 total, 23 passed, 0 failed
* i386: 13 total, 13 passed, 0 failed
* juno-r2: 1 total, 1 passed, 0 failed
* mips: 36 total, 36 passed, 0 failed
* sparc: 9 total, 9 passed, 0 failed
* x15: 1 total, 1 passed, 0 failed
* x86: 1 total, 1 passed, 0 failed
* x86_64: 13 total, 13 passed, 0 failed

## Test suites summary
* fwts
* install-android-platform-tools-r2600
* kselftest-android
* kselftest-bpf
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-efivarfs
* kselftest-filesystems
* kselftest-firmware
* kselftest-fpu
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-ir
* kselftest-kcmp
* kselftest-kexec
* kselftest-kvm
* kselftest-lib
* kselftest-livepatch
* kselftest-lkdtm
* kselftest-membarrier
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-splice
* kselftest-static_keys
* kselftest-sync
* kselftest-sysctl
* kselftest-timens
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user
* kselftest-vm
* kselftest-x86
* kselftest-zram
* kvm-unit-tests
* libhugetlbfs
* linux-log-parser
* ltp-cap_bounds-tests
* ltp-commands-tests
* ltp-containers-tests
* ltp-controllers-tests
* ltp-cpuhotplug-tests
* ltp-crypto-tests
* ltp-cve-tests
* ltp-dio-tests
* ltp-fcntl-locktests-tests
* ltp-filecaps-tests
* ltp-fs-tests
* ltp-fs_bind-tests
* ltp-fs_perms_simple-tests
* ltp-fsx-tests
* ltp-hugetlb-tests
* ltp-io-tests
* ltp-ipc-tests
* ltp-math-tests
* ltp-mm-tests
* ltp-nptl-tests
* ltp-open-posix-tests
* ltp-pty-tests
* ltp-sched-tests
* ltp-securebits-tests
* ltp-syscalls-tests
* ltp-tracing-tests
* network-basic-tests
* perf
* ssuite
* v4l2-compliance

--
Linaro LKFT
https://lkft.linaro.org

Thanks for testing all of these and letting me know

greg k-h

All tests passing for Tegra ...

Test results for stable-v4.4:

    6 builds:	6 pass, 0 fail
    12 boots:	12 pass, 0 fail
    30 tests:	30 pass, 0 fail

Linux version: 4.4.265-rc1-g5bb7d387c8f8
Boards tested: tegra124-jetson-tk1, tegra20-ventana,

                tegra30-cardhu-a04

Jon

Hi!

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-4.4.y

Best regards,
Pavel

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