4.9.284-rc1 review

This is the start of the stable review cycle for the 4.9.284 release. There are 26 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 Sun, 26 Sep 2021 12:43:20 +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-4.9.284-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-4.9.y
and the diffstat can be found below.

thanks,

greg k-h

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

Greg Kroah-Hartman <[email protected]>

    Linux 4.9.284-rc1

Marcelo Ricardo Leitner <[email protected]>
sctp: validate from_addr_param return

Guenter Roeck <[email protected]>
drm/nouveau/nvkm: Replace -ENOSYS with -ENODEV

Li Jinlin <[email protected]>
blk-throttle: fix UAF by deleteing timer in blk_throtl_exit()

Nanyong Sun <[email protected]>
nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group

Nanyong Sun <[email protected]>
nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group

Nanyong Sun <[email protected]>
nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group

Nanyong Sun <[email protected]>
nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group

Nanyong Sun <[email protected]>
nilfs2: fix NULL pointer in nilfs_##name##_attr_release

Nanyong Sun <[email protected]>
nilfs2: fix memory leak in nilfs_sysfs_create_device_group

Jeff Layton <[email protected]>
ceph: lockdep annotations for try_nonblocking_invalidate

Radhey Shyam Pandey <[email protected]>
dmaengine: xilinx_dma: Set DMA mask for coherent APIs

Johannes Berg <[email protected]>
dmaengine: ioat: depends on !UML

Guenter Roeck <[email protected]>
parisc: Move pci_dev_is_behind_card_dino to where it is used

Uwe Kleine-König <[email protected]>
pwm: mxs: Don't modify HW state in .probe() after the PWM chip was registered

Uwe Kleine-König <[email protected]>
pwm: lpc32xx: Don't modify HW state in .probe() after the PWM chip was registered

Pavel Skripkin <[email protected]>
profiling: fix shift-out-of-bounds bugs

Cyrill Gorcunov <[email protected]>
prctl: allow to setup brk for et_dyn executables

Xie Yongji <[email protected]>
9p/trans_virtio: Remove sysfs file on probe failure

Dan Carpenter <[email protected]>
thermal/drivers/exynos: Fix an error code in exynos_tmu_probe()

Andy Shevchenko <[email protected]>
dmaengine: acpi: Avoid comparison GSI with Linux vIRQ

Marcelo Ricardo Leitner <[email protected]>
sctp: add param size validation for SCTP_PARAM_SET_PRIMARY

Marcelo Ricardo Leitner <[email protected]>
sctp: validate chunk size in __rcv_asconf_lookup

Cheng Chao <[email protected]>
staging: android: ion: fix page is NULL

Christophe Leroy <[email protected]>
crypto: talitos - fix max key size for sha384 and sha512

Tony Lindgren <[email protected]>
PM / wakeirq: Fix unbalanced IRQ enable for wakeirq

Ilya Leoshkevich <[email protected]>
s390/bpf: Fix optimizing out zero-extensions

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

Diffstat:

 Makefile                                          |  4 +-
 arch/s390/net/bpf_jit_comp.c                      | 50 ++++++++++++-----------
 block/blk-throttle.c                              |  1 +
 drivers/base/power/wakeirq.c                      |  6 ++-
 drivers/crypto/talitos.c                          |  2 +-
 drivers/dma/Kconfig                               |  2 +-
 drivers/dma/acpi-dma.c                            | 10 +++--
 drivers/dma/xilinx/xilinx_dma.c                   |  2 +-
 drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c |  2 +-
 drivers/parisc/dino.c                             | 18 ++++----
 drivers/pwm/pwm-lpc32xx.c                         | 10 ++---
 drivers/pwm/pwm-mxs.c                             | 13 +++---
 drivers/staging/android/ion/ion_system_heap.c     |  2 +-
 drivers/thermal/samsung/exynos_tmu.c              |  1 +
 fs/ceph/caps.c                                    |  2 +
 fs/nilfs2/sysfs.c                                 | 26 +++++-------
 include/net/sctp/structs.h                        |  2 +-
 kernel/profile.c                                  | 21 +++++-----
 kernel/sys.c                                      |  7 ----
 net/9p/trans_virtio.c                             |  4 +-
 net/sctp/bind_addr.c                              | 20 +++++----
 net/sctp/input.c                                  |  9 +++-
 net/sctp/ipv6.c                                   |  7 +++-
 net/sctp/protocol.c                               |  7 +++-
 net/sctp/sm_make_chunk.c                          | 42 +++++++++++--------
 25 files changed, 149 insertions(+), 121 deletions(-)

From: Ilya Leoshkevich <[email protected]>

commit db7bee653859ef7179be933e7d1384644f795f26 upstream.

Currently the JIT completely removes things like reg32 += 0, however, the BPF_ALU semantics requires the target register to be zero-extended in such cases.

Fix by optimizing out only the arithmetic operation, but not the subsequent zero-extension.

---
 arch/s390/net/bpf_jit_comp.c |   50 ++++++++++++++++++++++---------------------
 1 file changed, 26 insertions(+), 24 deletions(-)

@@ -591,10 +591,10 @@ static noinline int bpf_jit_insn(struct
 		EMIT4(0xb9080000, dst_reg, src_reg);
 		break;
 	case BPF_ALU | BPF_ADD | BPF_K: /* dst = (u32) dst + (u32) imm */
-		if (!imm)
-			break;
-		/* alfi %dst,imm */
-		EMIT6_IMM(0xc20b0000, dst_reg, imm);
+		if (imm != 0) {
+			/* alfi %dst,imm */
+			EMIT6_IMM(0xc20b0000, dst_reg, imm);
+		}
 		EMIT_ZERO(dst_reg);
 		break;
 	case BPF_ALU64 | BPF_ADD | BPF_K: /* dst = dst + imm */

@@ -616,10 +616,10 @@ static noinline int bpf_jit_insn(struct
 		EMIT4(0xb9090000, dst_reg, src_reg);
 		break;
 	case BPF_ALU | BPF_SUB | BPF_K: /* dst = (u32) dst - (u32) imm */
-		if (!imm)
-			break;
-		/* alfi %dst,-imm */
-		EMIT6_IMM(0xc20b0000, dst_reg, -imm);
+		if (imm != 0) {
+			/* alfi %dst,-imm */
+			EMIT6_IMM(0xc20b0000, dst_reg, -imm);
+		}
 		EMIT_ZERO(dst_reg);
 		break;
 	case BPF_ALU64 | BPF_SUB | BPF_K: /* dst = dst - imm */

@@ -646,10 +646,10 @@ static noinline int bpf_jit_insn(struct
 		EMIT4(0xb90c0000, dst_reg, src_reg);
 		break;
 	case BPF_ALU | BPF_MUL | BPF_K: /* dst = (u32) dst * (u32) imm */
-		if (imm == 1)
-			break;
-		/* msfi %r5,imm */
-		EMIT6_IMM(0xc2010000, dst_reg, imm);
+		if (imm != 1) {
+			/* msfi %r5,imm */
+			EMIT6_IMM(0xc2010000, dst_reg, imm);
+		}
 		EMIT_ZERO(dst_reg);
 		break;
 	case BPF_ALU64 | BPF_MUL | BPF_K: /* dst = dst * imm */

@@ -710,6 +710,8 @@ static noinline int bpf_jit_insn(struct
 			if (BPF_OP(insn->code) == BPF_MOD)
 				/* lhgi %dst,0 */
 				EMIT4_IMM(0xa7090000, dst_reg, 0);
+			else
+				EMIT_ZERO(dst_reg);
 			break;
 		}
 		/* lhi %w0,0 */

@@ -802,10 +804,10 @@ static noinline int bpf_jit_insn(struct
 		EMIT4(0xb9820000, dst_reg, src_reg);
 		break;
 	case BPF_ALU | BPF_XOR | BPF_K: /* dst = (u32) dst ^ (u32) imm */
-		if (!imm)
-			break;
-		/* xilf %dst,imm */
-		EMIT6_IMM(0xc0070000, dst_reg, imm);
+		if (imm != 0) {
+			/* xilf %dst,imm */
+			EMIT6_IMM(0xc0070000, dst_reg, imm);
+		}
 		EMIT_ZERO(dst_reg);
 		break;
 	case BPF_ALU64 | BPF_XOR | BPF_K: /* dst = dst ^ imm */

@@ -826,10 +828,10 @@ static noinline int bpf_jit_insn(struct
 		EMIT6_DISP_LH(0xeb000000, 0x000d, dst_reg, dst_reg, src_reg, 0);
 		break;
 	case BPF_ALU | BPF_LSH | BPF_K: /* dst = (u32) dst << (u32) imm */
-		if (imm == 0)
-			break;
-		/* sll %dst,imm(%r0) */
-		EMIT4_DISP(0x89000000, dst_reg, REG_0, imm);
+		if (imm != 0) {
+			/* sll %dst,imm(%r0) */
+			EMIT4_DISP(0x89000000, dst_reg, REG_0, imm);
+		}
 		EMIT_ZERO(dst_reg);
 		break;
 	case BPF_ALU64 | BPF_LSH | BPF_K: /* dst = dst << imm */

@@ -851,10 +853,10 @@ static noinline int bpf_jit_insn(struct
 		EMIT6_DISP_LH(0xeb000000, 0x000c, dst_reg, dst_reg, src_reg, 0);
 		break;
 	case BPF_ALU | BPF_RSH | BPF_K: /* dst = (u32) dst >> (u32) imm */
-		if (imm == 0)
-			break;
-		/* srl %dst,imm(%r0) */
-		EMIT4_DISP(0x88000000, dst_reg, REG_0, imm);
+		if (imm != 0) {
+			/* srl %dst,imm(%r0) */
+			EMIT4_DISP(0x88000000, dst_reg, REG_0, imm);
+		}
 		EMIT_ZERO(dst_reg);
 		break;
 	case BPF_ALU64 | BPF_RSH | BPF_K: /* dst = dst >> imm */

From: Tony Lindgren <[email protected]>

commit 69728051f5bf15efaf6edfbcfe1b5a49a2437918 upstream.

If a device is runtime PM suspended when we enter suspend and has a dedicated wake IRQ, we can get the following warning:

WARNING: CPU: 0 PID: 108 at kernel/irq/manage.c:526 enable_irq+0x40/0x94
[  102.087860] Unbalanced enable for IRQ 147

...
(enable_irq) from [<c06117a8>] (dev_pm_arm_wake_irq+0x4c/0x60) (dev_pm_arm_wake_irq) from [<c0618360>]
(device_wakeup_arm_wake_irqs+0x58/0x9c)
(device_wakeup_arm_wake_irqs) from [<c0615948>] (dpm_suspend_noirq+0x10/0x48)
(dpm_suspend_noirq) from [<c01ac7ac>] (suspend_devices_and_enter+0x30c/0xf14) (suspend_devices_and_enter) from [<c01adf20>] (enter_state+0xad4/0xbd8)
(enter_state) from [<c01ad3ec>] (pm_suspend+0x38/0x98) (pm_suspend) from [<c01ab3e8>] (state_store+0x68/0xc8)

This is because the dedicated wake IRQ for the device may have been already enabled earlier by dev_pm_enable_wake_irq_check(). Fix the issue by checking for runtime PM suspended status.

This issue can be easily reproduced by setting serial console log level to zero, letting the serial console idle, and suspend the system from an ssh terminal. On resume, dmesg will have the warning above.

The reason why I have not run into this issue earlier has been that I typically run my PM test cases from on a serial console instead over ssh.

---
 drivers/base/power/wakeirq.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

@@ -320,7 +320,8 @@ void dev_pm_arm_wake_irq(struct wake_irq
 		return;
 
 	if (device_may_wakeup(wirq->dev)) {
-		if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)
+		if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED &&
+		    !pm_runtime_status_suspended(wirq->dev))
 			enable_irq(wirq->irq);
 
 		enable_irq_wake(wirq->irq);

@@ -342,7 +343,8 @@ void dev_pm_disarm_wake_irq(struct wake_
 	if (device_may_wakeup(wirq->dev)) {
 		disable_irq_wake(wirq->irq);
 
-		if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)
+		if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED &&
+		    !pm_runtime_status_suspended(wirq->dev))
 			disable_irq_nosync(wirq->irq);
 	}
 }

From: Christophe Leroy <[email protected]>

commit 192125ed5ce62afba24312d8e7a0314577565b4a upstream.

Below commit came with a typo in the CONFIG_ symbol, leading to a permanently reduced max key size regarless of the driver capabilities.

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

@@ -816,7 +816,7 @@ static void talitos_unregister_rng(struc
  * HMAC_SNOOP_NO_AFEA (HSNA) instead of type IPSEC_ESP
  */
 #define TALITOS_CRA_PRIORITY_AEAD_HSNA	(TALITOS_CRA_PRIORITY - 1)
-#ifdef CONFIG_CRYPTO_DEV_TALITOS_SEC2
+#ifdef CONFIG_CRYPTO_DEV_TALITOS2
 #define TALITOS_MAX_KEY_SIZE		(AES_MAX_KEY_SIZE + SHA512_BLOCK_SIZE)
 #else
 #define TALITOS_MAX_KEY_SIZE		(AES_MAX_KEY_SIZE + SHA256_BLOCK_SIZE)

From: Cheng Chao <[email protected]>

the commit e7f63771b60e introduced the bug which didn't test page which maybe NULL. and previous logic was right.

the e7f63771b60e has been merged in v4.8-rc3, only longterm 4.9.x has this bug, and other longterm/stable version have not.

kernel panic is here when page is NULL:

Unable to handle kernel paging request at virtual address b0380000
pgd = d9d94000
[b0380000] *pgd=00000000
Internal error: Oops: 2805 [#1] PREEMPT SMP ARM

...
task: daa2dd00 task.stack: da194000
PC is at v7_dma_clean_range+0x1c/0x34
LR is at arm_dma_sync_single_for_device+0x44/0x58

pc : [<c011aa0c>]    lr : [<c011645c>]    psr: 200f0013

sp : da195da0 ip : dc1f9000 fp : c1043dc4
r10: 00000000 r9 : c16f1f58 r8 : 00000001
r7 : c1621f94 r6 : c0116418 r5 : 00000000 r4 : c011aa58
r3 : 0000003f r2 : 00000040 r1 : b0480000 r0 : b0380000
Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 10c5383d Table: 19d9406a DAC: 00000051
...
[<c011aa0c>] (v7_dma_clean_range) from [<c011645c>] (arm_dma_sync_single_for_device+0x44/0x58) [<c011645c>] (arm_dma_sync_single_for_device) from [<c0117088>] (arm_dma_sync_sg_for_device+0x50/0x7c) [<c0117088>] (arm_dma_sync_sg_for_device) from [<c0c033c4>] (ion_pages_sync_for_device+0xb0/0xec) [<c0c033c4>] (ion_pages_sync_for_device) from [<c0c054ac>] (ion_system_heap_allocate+0x2a0/0x2e0) [<c0c054ac>] (ion_system_heap_allocate) from [<c0c02c78>] (ion_alloc+0x12c/0x494) [<c0c02c78>] (ion_alloc) from [<c0c03eac>] (ion_ioctl+0x510/0x63c)
[<c0c03eac>] (ion_ioctl) from [<c027c4b0>] (do_vfs_ioctl+0xa8/0x9b4)
[<c027c4b0>] (do_vfs_ioctl) from [<c027ce28>] (SyS_ioctl+0x6c/0x7c)
[<c027ce28>] (SyS_ioctl) from [<c0108a40>] (ret_fast_syscall+0x0/0x48)

Code: e3a02004 e1a02312 e2423001 e1c00003 (ee070f3a)
---[ end trace 89278304932c0e87 ]---
Kernel panic - not syncing: Fatal exception

---
 drivers/staging/android/ion/ion_system_heap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -75,7 +75,7 @@ static struct page *alloc_buffer_page(st
 
 	page = ion_page_pool_alloc(pool);
 
-	if (cached)
+	if (page && cached)
 		ion_pages_sync_for_device(NULL, page, PAGE_SIZE << order,
 					  DMA_BIDIRECTIONAL);
 	return page;

From: Marcelo Ricardo Leitner <[email protected]>

commit b6ffe7671b24689c09faa5675dd58f93758a97ae upstream.

In one of the fallbacks that SCTP has for identifying an association for an incoming packet, it looks for AddIp chunk (from ASCONF) and take a peek. Thing is, at this stage nothing was validating that the chunk actually had enough content for that, allowing the peek to happen over uninitialized memory.

Similar check already exists in actual asconf handling in sctp_verify_asconf().

---
 net/sctp/input.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -1087,6 +1087,9 @@ static struct sctp_association *__sctp_r
 	union sctp_addr_param *param;
 	union sctp_addr paddr;
 
+	if (ntohs(ch->length) < sizeof(*asconf) + sizeof(struct sctp_paramhdr))
+		return NULL;
+
 	/* Skip over the ADDIP header and find the Address parameter */
 	param = (union sctp_addr_param *)(asconf + 1);
 

From: Marcelo Ricardo Leitner <[email protected]>

commit ef6c8d6ccf0c1dccdda092ebe8782777cd7803c9 upstream.

When SCTP handles an INIT chunk, it calls for example:
sctp_sf_do_5_1B_init
sctp_verify_init
sctp_verify_param
sctp_process_init
sctp_process_param
handling of SCTP_PARAM_SET_PRIMARY

sctp_verify_init() wasn't doing proper size validation and neither the later handling, allowing it to work over the chunk itself, possibly being uninitialized memory.

---
 net/sctp/sm_make_chunk.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

@@ -2155,9 +2155,16 @@ static sctp_ierror_t sctp_verify_param(s
 		break;
 
 	case SCTP_PARAM_SET_PRIMARY:
-		if (net->sctp.addip_enable)
-			break;
-		goto fallthrough;
+		if (!net->sctp.addip_enable)
+			goto fallthrough;
+
+		if (ntohs(param.p->length) < sizeof(struct sctp_addip_param) +
+					     sizeof(struct sctp_paramhdr)) {
+			sctp_process_inv_paramlength(asoc, param.p,
+						     chunk, err_chunk);
+			retval = SCTP_IERROR_ABORT;
+		}
+		break;
 
 	case SCTP_PARAM_HOST_NAME_ADDRESS:
 		/* Tell the peer, we won't support this param.  */

From: Andy Shevchenko <[email protected]>

commit 67db87dc8284070adb15b3c02c1c31d5cf51c5d6 upstream.

Currently the CRST parsing relies on the fact that on most of x86 devices the IRQ mapping is 1:1 with Linux vIRQ. However, it may be not true for some. Fix this by converting GSI to Linux vIRQ before checking it.

---
 drivers/dma/acpi-dma.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

@@ -72,10 +72,14 @@ static int acpi_dma_parse_resource_group
 
 	si = (const struct acpi_csrt_shared_info *)&grp[1];
 
-	/* Match device by MMIO and IRQ */
+	/* Match device by MMIO */
 	if (si->mmio_base_low != lower_32_bits(mem) ||
-	    si->mmio_base_high != upper_32_bits(mem) ||
-	    si->gsi_interrupt != irq)
+	    si->mmio_base_high != upper_32_bits(mem))
+		return 0;
+
+	/* Match device by Linux vIRQ */
+	ret = acpi_register_gsi(NULL, si->gsi_interrupt, si->interrupt_mode, si->interrupt_polarity);
+	if (ret != irq)
 		return 0;
 
 	dev_dbg(&adev->dev, "matches with %.4s%04X (rev %u)\n",

From: Dan Carpenter <[email protected]>

commit 02d438f62c05f0d055ceeedf12a2f8796b258c08 upstream.

This error path return success but it should propagate the negative error code from devm_clk_get().

---
 drivers/thermal/samsung/exynos_tmu.c |    1 +
 1 file changed, 1 insertion(+)

@@ -1372,6 +1372,7 @@ static int exynos_tmu_probe(struct platf
 		data->sclk = devm_clk_get(&pdev->dev, "tmu_sclk");
 		if (IS_ERR(data->sclk)) {
 			dev_err(&pdev->dev, "Failed to get sclk\n");
+			ret = PTR_ERR(data->sclk);
 			goto err_clk;
 		} else {
 			ret = clk_prepare_enable(data->sclk);

From: Xie Yongji <[email protected]>

commit f997ea3b7afc108eb9761f321b57de2d089c7c48 upstream.

This ensures we don't leak the sysfs file if we failed to allocate chan->vc_wq during probe.

---
 net/9p/trans_virtio.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -602,7 +602,7 @@ static int p9_virtio_probe(struct virtio
 	chan->vc_wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL);
 	if (!chan->vc_wq) {
 		err = -ENOMEM;
-		goto out_free_tag;
+		goto out_remove_file;
 	}
 	init_waitqueue_head(chan->vc_wq);
 	chan->ring_bufs_avail = 1;

@@ -620,6 +620,8 @@ static int p9_virtio_probe(struct virtio
 
 	return 0;
 
+out_remove_file:
+	sysfs_remove_file(&vdev->dev.kobj, &dev_attr_mount_tag.attr);
 out_free_tag:
 	kfree(tag);
 out_free_vq:

From: Cyrill Gorcunov <[email protected]>

commit e1fbbd073137a9d63279f6bf363151a938347640 upstream.

Keno Fischer reported that when a binray loaded via ld-linux-x the prctl(PR_SET_MM_MAP) doesn't allow to setup brk value because it lays before mm:end_data.

For example a test program shows

 | # ~/t
 |
 | start_code      401000
 | end_code        401a15
 | start_stack     7ffce4577dd0
 | start_data	   403e10
 | end_data        40408c
 | start_brk	   b5b000
 | sbrk(0)         b5b000

and when executed via ld-linux

 | # /lib64/ld-linux-x86-64.so.2 ~/t
 |
 | start_code      7fc25b0a4000
 | end_code        7fc25b0c4524
 | start_stack     7fffcc6b2400
 | start_data	   7fc25b0ce4c0
 | end_data        7fc25b0cff98
 | start_brk	   55555710c000
 | sbrk(0)         55555710c000

This of course prevent criu from restoring such programs. Looking into how kernel operates with brk/start_brk inside brk() syscall I don't see any problem if we allow to setup brk/start_brk without checking for end_data. Even if someone pass some weird address here on a purpose then the worst possible result will be an unexpected unmapping of existing vma (own vma, since prctl works with the callers memory) but test for RLIMIT_DATA is still valid and a user won't be able to gain more memory in case of expanding VMAs via new values shipped with prctl call.

---
 kernel/sys.c |    7 -------
 1 file changed, 7 deletions(-)

@@ -1775,13 +1775,6 @@ static int validate_prctl_map(struct prc
 	error = -EINVAL;
 
 	/*
-	 * @brk should be after @end_data in traditional maps.
-	 */
-	if (prctl_map->start_brk <= prctl_map->end_data ||
-	    prctl_map->brk <= prctl_map->end_data)
-		goto out;
-
-	/*
 	 * Neither we should allow to override limits if they set.
 	 */
 	if (check_data_rlimit(rlimit(RLIMIT_DATA), prctl_map->brk,

From: Pavel Skripkin <[email protected]>

commit 2d186afd04d669fe9c48b994c41a7405a3c9f16d upstream.

Syzbot reported shift-out-of-bounds bug in profile_init().
The problem was in incorrect prof_shift. Since prof_shift value comes from userspace we need to clamp this value into [0, BITS_PER_LONG -1] boundaries.

Second possible shiht-out-of-bounds was found by Tetsuo:
sample_step local variable in read_profile() had "unsigned int" type, but prof_shift allows to make a BITS_PER_LONG shift. So, to prevent possible shiht-out-of-bounds sample_step type was changed to "unsigned long".

Also, "unsigned short int" will be sufficient for storing [0, BITS_PER_LONG] value, that's why there is no need for "unsigned long" prof_shift.

---
 kernel/profile.c |   21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

@@ -38,7 +38,8 @@ struct profile_hit {
 #define NR_PROFILE_GRP		(NR_PROFILE_HIT/PROFILE_GRPSZ)
 
 static atomic_t *prof_buffer;
-static unsigned long prof_len, prof_shift;
+static unsigned long prof_len;
+static unsigned short int prof_shift;
 
 int prof_on __read_mostly;
 EXPORT_SYMBOL_GPL(prof_on);

@@ -64,8 +65,8 @@ int profile_setup(char *str)
 		if (str[strlen(sleepstr)] == ',')
 			str += strlen(sleepstr) + 1;
 		if (get_option(&str, &par))
-			prof_shift = par;
-		pr_info("kernel sleep profiling enabled (shift: %ld)\n",
+			prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
+		pr_info("kernel sleep profiling enabled (shift: %u)\n",
 			prof_shift);
 #else
 		pr_warn("kernel sleep profiling requires CONFIG_SCHEDSTATS\n");

@@ -75,21 +76,21 @@ int profile_setup(char *str)
 		if (str[strlen(schedstr)] == ',')
 			str += strlen(schedstr) + 1;
 		if (get_option(&str, &par))
-			prof_shift = par;
-		pr_info("kernel schedule profiling enabled (shift: %ld)\n",
+			prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
+		pr_info("kernel schedule profiling enabled (shift: %u)\n",
 			prof_shift);
 	} else if (!strncmp(str, kvmstr, strlen(kvmstr))) {
 		prof_on = KVM_PROFILING;
 		if (str[strlen(kvmstr)] == ',')
 			str += strlen(kvmstr) + 1;
 		if (get_option(&str, &par))
-			prof_shift = par;
-		pr_info("kernel KVM profiling enabled (shift: %ld)\n",
+			prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
+		pr_info("kernel KVM profiling enabled (shift: %u)\n",
 			prof_shift);
 	} else if (get_option(&str, &par)) {
-		prof_shift = par;
+		prof_shift = clamp(par, 0, BITS_PER_LONG - 1);
 		prof_on = CPU_PROFILING;
-		pr_info("kernel profiling enabled (shift: %ld)\n",
+		pr_info("kernel profiling enabled (shift: %u)\n",
 			prof_shift);
 	}
 	return 1;

@@ -465,7 +466,7 @@ read_profile(struct file *file, char __u
 	unsigned long p = *ppos;
 	ssize_t read;
 	char *pnt;
-	unsigned int sample_step = 1 << prof_shift;
+	unsigned long sample_step = 1UL << prof_shift;
 
 	profile_flip_buffers();
 	if (p >= (prof_len+1)*sizeof(unsigned int))

From: Uwe Kleine-König <[email protected]>

commit 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e upstream.

This fixes a race condition: After pwmchip_add() is called there might already be a consumer and then modifying the hardware behind the consumer's back is bad. So set the default before.

(Side-note: I don't know what this register setting actually does, if this modifies the polarity there is an inconsistency because the inversed polarity isn't considered if the PWM is already running during .probe().)

---
 drivers/pwm/pwm-lpc32xx.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

@@ -124,17 +124,17 @@ static int lpc32xx_pwm_probe(struct plat
 	lpc32xx->chip.npwm = 1;
 	lpc32xx->chip.base = -1;
 
+	/* If PWM is disabled, configure the output to the default value */
+	val = readl(lpc32xx->base + (lpc32xx->chip.pwms[0].hwpwm << 2));
+	val &= ~PWM_PIN_LEVEL;
+	writel(val, lpc32xx->base + (lpc32xx->chip.pwms[0].hwpwm << 2));
+
 	ret = pwmchip_add(&lpc32xx->chip);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to add PWM chip, error %d\n", ret);
 		return ret;
 	}
 
-	/* When PWM is disable, configure the output to the default value */
-	val = readl(lpc32xx->base + (lpc32xx->chip.pwms[0].hwpwm << 2));
-	val &= ~PWM_PIN_LEVEL;
-	writel(val, lpc32xx->base + (lpc32xx->chip.pwms[0].hwpwm << 2));
-
 	platform_set_drvdata(pdev, lpc32xx);
 
 	return 0;

From: Uwe Kleine-König <[email protected]>

commit 020162d6f49f2963062229814a56a89c86cbeaa8 upstream.

This fixes a race condition: After pwmchip_add() is called there might already be a consumer and then modifying the hardware behind the consumer's back is bad. So reset before calling pwmchip_add().

Note that reseting the hardware isn't the right thing to do if the PWM is already running as it might e.g. disable (or even enable) a backlight that is supposed to be on (or off).

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

@@ -158,6 +158,11 @@ static int mxs_pwm_probe(struct platform
 		return ret;
 	}
 
+	/* FIXME: Only do this if the PWM isn't already running */
+	ret = stmp_reset_block(mxs->base);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to reset PWM\n");
+
 	ret = pwmchip_add(&mxs->chip);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to add pwm chip %d\n", ret);

@@ -166,15 +171,7 @@ static int mxs_pwm_probe(struct platform
 
 	platform_set_drvdata(pdev, mxs);
 
-	ret = stmp_reset_block(mxs->base);
-	if (ret)
-		goto pwm_remove;
-
 	return 0;
-
-pwm_remove:
-	pwmchip_remove(&mxs->chip);
-	return ret;
 }
 
 static int mxs_pwm_remove(struct platform_device *pdev)

From: Guenter Roeck <[email protected]>

[ Upstream commit 907872baa9f1538eed02ec737b8e89eba6c6e4b9 ]

parisc build test images fail to compile with the following error.

drivers/parisc/dino.c:160:12: error:
'pci_dev_is_behind_card_dino' defined but not used

Move the function just ahead of its only caller to avoid the error.

---
 drivers/parisc/dino.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

index d842ae5310f7..bbcff6ae61d6 100644
@@ -160,15 +160,6 @@ struct dino_device
 	(struct dino_device *)__pdata; })
 
 
-/* Check if PCI device is behind a Card-mode Dino. */
-static int pci_dev_is_behind_card_dino(struct pci_dev *dev)
-{
-	struct dino_device *dino_dev;
-
-	dino_dev = DINO_DEV(parisc_walk_tree(dev->bus->bridge));
-	return is_card_dino(&dino_dev->hba.dev->id);
-}
-
 /*
  * Dino Configuration Space Accessor Functions
  */

@@ -452,6 +443,15 @@ static void quirk_cirrus_cardbus(struct pci_dev *dev)
 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus );
 
 #ifdef CONFIG_TULIP
+/* Check if PCI device is behind a Card-mode Dino. */
+static int pci_dev_is_behind_card_dino(struct pci_dev *dev)
+{
+	struct dino_device *dino_dev;
+
+	dino_dev = DINO_DEV(parisc_walk_tree(dev->bus->bridge));
+	return is_card_dino(&dino_dev->hba.dev->id);
+}
+
 static void pci_fixup_tulip(struct pci_dev *dev)
 {
 	if (!pci_dev_is_behind_card_dino(dev))

2.33.0

From: Johannes Berg <[email protected]>

[ Upstream commit bbac7a92a46f0876e588722ebe552ddfe6fd790f ]

Now that UML has PCI support, this driver must depend also on !UML since it pokes at X86_64 architecture internals that don't exist on ARCH=um.

---
 drivers/dma/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index b0f798244a89..9a6da9b2dad3 100644
@@ -238,7 +238,7 @@ config INTEL_IDMA64
 
 config INTEL_IOATDMA
 	tristate "Intel I/OAT DMA support"
-	depends on PCI && X86_64
+	depends on PCI && X86_64 && !UML
 	select DMA_ENGINE
 	select DMA_ENGINE_RAID
 	select DCA

2.33.0

From: Radhey Shyam Pandey <[email protected]>

[ Upstream commit aac6c0f90799d66b8989be1e056408f33fd99fe6 ]

The xilinx dma driver uses the consistent allocations, so for correct operation also set the DMA mask for coherent APIs. It fixes the below kernel crash with dmatest client when DMA IP is configured with 64-bit address width and linux is booted from high (>4GB) memory.

Call trace:
[  489.531257]  dma_alloc_from_pool+0x8c/0x1c0
[  489.535431]  dma_direct_alloc+0x284/0x330
[  489.539432]  dma_alloc_attrs+0x80/0xf0
[  489.543174]  dma_pool_alloc+0x160/0x2c0
[  489.547003]  xilinx_cdma_prep_memcpy+0xa4/0x180
[  489.551524]  dmatest_func+0x3cc/0x114c
[  489.555266]  kthread+0x124/0x130
[  489.558486]  ret_from_fork+0x10/0x3c
[  489.562051] ---[ end trace 248625b2d596a90a ]---

---
 drivers/dma/xilinx/xilinx_dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index f00652585ee3..d88c53ff7bb6 100644
@@ -2578,7 +2578,7 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 		xdev->ext_addr = false;
 
 	/* Set the dma mask bits */
-	dma_set_mask(xdev->dev, DMA_BIT_MASK(addr_width));
+	dma_set_mask_and_coherent(xdev->dev, DMA_BIT_MASK(addr_width));
 
 	/* Initialize the DMA engine */
 	xdev->common.dev = &pdev->dev;

2.33.0

From: Jeff Layton <[email protected]>

[ Upstream commit 3eaf5aa1cfa8c97c72f5824e2e9263d6cc977b03 ]

---
 fs/ceph/caps.c | 2 ++
 1 file changed, 2 insertions(+)

index 0eb2ada032c7..839bccbcc9d6 100644
@@ -1572,6 +1572,8 @@ static int __mark_caps_flushing(struct inode *inode,
  * try to invalidate mapping pages without blocking.
  */
 static int try_nonblocking_invalidate(struct inode *inode)
+	__releases(ci->i_ceph_lock)
+	__acquires(ci->i_ceph_lock)
 {
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	u32 invalidating_gen = ci->i_rdcache_gen;

2.33.0

From: Nanyong Sun <[email protected]>

[ Upstream commit 5f5dec07aca7067216ed4c1342e464e7307a9197 ]

Patch series "nilfs2: fix incorrect usage of kobject".

This patchset from Nanyong Sun fixes memory leak issues and a NULL pointer dereference issue caused by incorrect usage of kboject in nilfs2 sysfs implementation.

This patch (of 6):

Reported by syzkaller:

  BUG: memory leak
  unreferenced object 0xffff888100ca8988 (size 8):
  comm "syz-executor.1", pid 1930, jiffies 4294745569 (age 18.052s)
  hex dump (first 8 bytes):
  6c 6f 6f 70 31 00 ff ff loop1...
  backtrace:
    kstrdup+0x36/0x70 mm/util.c:60
    kstrdup_const+0x35/0x60 mm/util.c:83
    kvasprintf_const+0xf1/0x180 lib/kasprintf.c:48
    kobject_set_name_vargs+0x56/0x150 lib/kobject.c:289
    kobject_add_varg lib/kobject.c:384 [inline]
    kobject_init_and_add+0xc9/0x150 lib/kobject.c:473
    nilfs_sysfs_create_device_group+0x150/0x7d0 fs/nilfs2/sysfs.c:986
    init_nilfs+0xa21/0xea0 fs/nilfs2/the_nilfs.c:637
    nilfs_fill_super fs/nilfs2/super.c:1046 [inline]
    nilfs_mount+0x7b4/0xe80 fs/nilfs2/super.c:1316
    legacy_get_tree+0x105/0x210 fs/fs_context.c:592
    vfs_get_tree+0x8e/0x2d0 fs/super.c:1498
    do_new_mount fs/namespace.c:2905 [inline]
    path_mount+0xf9b/0x1990 fs/namespace.c:3235
    do_mount+0xea/0x100 fs/namespace.c:3248
    __do_sys_mount fs/namespace.c:3456 [inline]
    __se_sys_mount fs/namespace.c:3433 [inline]
    __x64_sys_mount+0x14b/0x1f0 fs/namespace.c:3433
    do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
    entry_SYSCALL_64_after_hwframe+0x44/0xae

If kobject_init_and_add return with error, then the cleanup of kobject is needed because memory may be allocated in kobject_init_and_add without freeing.

And the place of cleanup_dev_kobject should use kobject_put to free the memory associated with the kobject. As the section "Kobject removal" of "Documentation/core-api/kobject.rst" says, kobject_del() just makes the kobject "invisible", but it is not cleaned up. And no more cleanup will do after cleanup_dev_kobject, so kobject_put is needed here.

---
 fs/nilfs2/sysfs.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

index e9903bceb2bf..a35978bf8395 100644
@@ -1010,7 +1010,7 @@ int nilfs_sysfs_create_device_group(struct super_block *sb)
 	err = kobject_init_and_add(&nilfs->ns_dev_kobj, &nilfs_dev_ktype, NULL,
 				    "%s", sb->s_id);
 	if (err)
-		goto free_dev_subgroups;
+		goto cleanup_dev_kobject;
 
 	err = nilfs_sysfs_create_mounted_snapshots_group(nilfs);
 	if (err)

@@ -1047,9 +1047,7 @@ delete_mounted_snapshots_group:
 	nilfs_sysfs_delete_mounted_snapshots_group(nilfs);
 
 cleanup_dev_kobject:
-	kobject_del(&nilfs->ns_dev_kobj);
-
-free_dev_subgroups:
+	kobject_put(&nilfs->ns_dev_kobj);
 	kfree(nilfs->ns_dev_subgroups);
 
 failed_create_device_group:

2.33.0

From: Nanyong Sun <[email protected]>

[ Upstream commit dbc6e7d44a514f231a64d9d5676e001b660b6448 ]

In nilfs_##name##_attr_release, kobj->parent should not be referenced because it is a NULL pointer. The release() method of kobject is always called in kobject_put(kobj), in the implementation of kobject_put(), the kobj->parent will be assigned as NULL before call the release() method. So just use kobj to get the subgroups, which is more efficient and can fix a NULL pointer reference problem.

---
 fs/nilfs2/sysfs.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

index a35978bf8395..027a50bc0765 100644
@@ -73,11 +73,9 @@ static const struct sysfs_ops nilfs_##name##_attr_ops = { \
 #define NILFS_DEV_INT_GROUP_TYPE(name, parent_name) \
 static void nilfs_##name##_attr_release(struct kobject *kobj) \
 { \
-	struct nilfs_sysfs_##parent_name##_subgroups *subgroups; \
-	struct the_nilfs *nilfs = container_of(kobj->parent, \
-						struct the_nilfs, \
-						ns_##parent_name##_kobj); \
-	subgroups = nilfs->ns_##parent_name##_subgroups; \
+	struct nilfs_sysfs_##parent_name##_subgroups *subgroups = container_of(kobj, \
+						struct nilfs_sysfs_##parent_name##_subgroups, \
+						sg_##name##_kobj); \
 	complete(&subgroups->sg_##name##_kobj_unregister); \
 } \
 static struct kobj_type nilfs_##name##_ktype = { \

2.33.0

From: Nanyong Sun <[email protected]>

[ Upstream commit 24f8cb1ed057c840728167dab33b32e44147c86f ]

If kobject_init_and_add return with error, kobject_put() is needed here to avoid memory leak, because kobject_init_and_add may return error without freeing the memory associated with the kobject it allocated.

---
 fs/nilfs2/sysfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 027a50bc0765..eab7bd68da12 100644
@@ -101,8 +101,8 @@ static int nilfs_sysfs_create_##name##_group(struct the_nilfs *nilfs) \
 	err = kobject_init_and_add(kobj, &nilfs_##name##_ktype, parent, \
 				    #name); \
 	if (err) \
-		return err; \
-	return 0; \
+		kobject_put(kobj); \
+	return err; \
 } \
 static void nilfs_sysfs_delete_##name##_group(struct the_nilfs *nilfs) \
 { \

2.33.0

From: Nanyong Sun <[email protected]>

[ Upstream commit a3e181259ddd61fd378390977a1e4e2316853afa ]

The kobject_put() should be used to cleanup the memory associated with the kobject instead of kobject_del. See the section "Kobject removal" of "Documentation/core-api/kobject.rst".

---
 fs/nilfs2/sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index eab7bd68da12..31eed118d0ce 100644
@@ -106,7 +106,7 @@ static int nilfs_sysfs_create_##name##_group(struct the_nilfs *nilfs) \
 } \
 static void nilfs_sysfs_delete_##name##_group(struct the_nilfs *nilfs) \
 { \
-	kobject_del(&nilfs->ns_##parent_name##_subgroups->sg_##name##_kobj); \
+	kobject_put(&nilfs->ns_##parent_name##_subgroups->sg_##name##_kobj); \
 }
 
 /************************************************************************

2.33.0

From: Nanyong Sun <[email protected]>

[ Upstream commit b2fe39c248f3fa4bbb2a20759b4fdd83504190f7 ]

If kobject_init_and_add returns with error, kobject_put() is needed here to avoid memory leak, because kobject_init_and_add may return error without freeing the memory associated with the kobject it allocated.

---
 fs/nilfs2/sysfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 31eed118d0ce..28f5572c6aae 100644
@@ -217,9 +217,9 @@ int nilfs_sysfs_create_snapshot_group(struct nilfs_root *root)
 	}
 
 	if (err)
-		return err;
+		kobject_put(&root->snapshot_kobj);
 
-	return 0;
+	return err;
 }
 
 void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *root)

2.33.0

From: Nanyong Sun <[email protected]>

[ Upstream commit 17243e1c3072b8417a5ebfc53065d0a87af7ca77 ]

kobject_put() should be used to cleanup the memory associated with the kobject instead of kobject_del(). See the section "Kobject removal" of "Documentation/core-api/kobject.rst".

---
 fs/nilfs2/sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 28f5572c6aae..33fba75aa9f3 100644
@@ -224,7 +224,7 @@ int nilfs_sysfs_create_snapshot_group(struct nilfs_root *root)
 
 void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *root)
 {
-	kobject_del(&root->snapshot_kobj);
+	kobject_put(&root->snapshot_kobj);
 }
 
 /************************************************************************

2.33.0

From: Li Jinlin <[email protected]>

[ Upstream commit 884f0e84f1e3195b801319c8ec3d5774e9bf2710 ]

The pending timer has been set up in blk_throtl_init(). However, the timer is not deleted in blk_throtl_exit(). This means that the timer handler may still be running after freeing the timer, which would result in a use-after-free.

Fix by calling del_timer_sync() to delete the timer in blk_throtl_exit().

---
 block/blk-throttle.c | 1 +
 1 file changed, 1 insertion(+)

index 3a4c9a3c1427..6435dc25be0a 100644
@@ -1584,6 +1584,7 @@ int blk_throtl_init(struct request_queue *q)
 void blk_throtl_exit(struct request_queue *q)
 {
 	BUG_ON(!q->td);
+	del_timer_sync(&q->td->service_queue.pending_timer);
 	throtl_shutdown_wq(q);
 	blkcg_deactivate_policy(q, &blkcg_policy_throtl);
 	kfree(q->td);

2.33.0

From: Guenter Roeck <[email protected]>

commit e8f71f89236ef82d449991bfbc237e3cb6ea584f upstream.

nvkm test builds fail with the following error.

drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c: In function 'nvkm_control_mthd_pstate_info':
drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c:60:35: error: overflow in conversion from 'int' to '__s8' {aka 'signed char'} changes value from '-251' to '5'

The code builds on most architectures, but fails on parisc where ENOSYS is defined as 251.

Replace the error code with -ENODEV (-19). The actual error code does not really matter and is not passed to userspace - it just has to be negative.

---
 drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -57,7 +57,7 @@ nvkm_control_mthd_pstate_info(struct nvk
 		args->v0.count = 0;
 		args->v0.ustate_ac = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
 		args->v0.ustate_dc = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
-		args->v0.pwrsrc = -ENOSYS;
+		args->v0.pwrsrc = -ENODEV;
 		args->v0.pstate = NVIF_CONTROL_PSTATE_INFO_V0_PSTATE_UNKNOWN;
 	}
 

From: Marcelo Ricardo Leitner <[email protected]>

commit 0c5dc070ff3d6246d22ddd931f23a6266249e3db upstream.

Ilja reported that, simply putting it, nothing was validating that from_addr_param functions were operating on initialized memory. That is, the parameter itself was being validated by sctp_walk_params, but it doesn't check for types and their specific sizes and it could be a 0-length one, causing from_addr_param to potentially work over the next parameter or even uninitialized memory.

The fix here is to, in all calls to from_addr_param, check if enough space is there for the wanted IP address type.

---
 include/net/sctp/structs.h |    2 +-
 net/sctp/bind_addr.c       |   20 +++++++++++---------
 net/sctp/input.c           |    6 ++++--
 net/sctp/ipv6.c            |    7 ++++++-
 net/sctp/protocol.c        |    7 ++++++-
 net/sctp/sm_make_chunk.c   |   29 ++++++++++++++++-------------
 6 files changed, 44 insertions(+), 27 deletions(-)

@@ -470,7 +470,7 @@ struct sctp_af {
 					 int saddr);
 	void		(*from_sk)	(union sctp_addr *,
 					 struct sock *sk);
-	void		(*from_addr_param) (union sctp_addr *,
+	bool		(*from_addr_param) (union sctp_addr *,
 					    union sctp_addr_param *,
 					    __be16 port, int iif);
 	int		(*to_addr_param) (const union sctp_addr *,

@@ -285,20 +285,16 @@ int sctp_raw_to_bind_addrs(struct sctp_b
 		rawaddr = (union sctp_addr_param *)raw_addr_list;
 
 		af = sctp_get_af_specific(param_type2af(param->type));
-		if (unlikely(!af)) {
+		if (unlikely(!af) ||
+		    !af->from_addr_param(&addr, rawaddr, htons(port), 0)) {
 			retval = -EINVAL;
-			sctp_bind_addr_clean(bp);
-			break;
+			goto out_err;
 		}
 
-		af->from_addr_param(&addr, rawaddr, htons(port), 0);
 		retval = sctp_add_bind_addr(bp, &addr, sizeof(addr),
 					    SCTP_ADDR_SRC, gfp);
-		if (retval) {
-			/* Can't finish building the list, clean up. */
-			sctp_bind_addr_clean(bp);
-			break;
-		}
+		if (retval)
+			goto out_err;
 
 		len = ntohs(param->length);
 		addrs_len -= len;

@@ -306,6 +302,12 @@ int sctp_raw_to_bind_addrs(struct sctp_b
 	}
 
 	return retval;
+
+out_err:
+	if (retval)
+		sctp_bind_addr_clean(bp);
+
+	return retval;
 }
 
 /********************************************************************

@@ -1051,7 +1051,8 @@ static struct sctp_association *__sctp_r
 		if (!af)
 			continue;
 
-		af->from_addr_param(paddr, params.addr, sh->source, 0);
+		if (!af->from_addr_param(paddr, params.addr, sh->source, 0))
+			continue;
 
 		asoc = __sctp_lookup_association(net, laddr, paddr, transportp);
 		if (asoc)

@@ -1097,7 +1098,8 @@ static struct sctp_association *__sctp_r
 	if (unlikely(!af))
 		return NULL;
 
-	af->from_addr_param(&paddr, param, peer_port, 0);
+	if (af->from_addr_param(&paddr, param, peer_port, 0))
+		return NULL;
 
 	return __sctp_lookup_association(net, laddr, &paddr, transportp);
 }

@@ -490,15 +490,20 @@ static void sctp_v6_to_sk_daddr(union sc
 }
 
 /* Initialize a sctp_addr from an address parameter. */
-static void sctp_v6_from_addr_param(union sctp_addr *addr,
+static bool sctp_v6_from_addr_param(union sctp_addr *addr,
 				    union sctp_addr_param *param,
 				    __be16 port, int iif)
 {
+	if (ntohs(param->v6.param_hdr.length) < sizeof(struct sctp_ipv6addr_param))
+		return false;
+
 	addr->v6.sin6_family = AF_INET6;
 	addr->v6.sin6_port = port;
 	addr->v6.sin6_flowinfo = 0; /* BUG */
 	addr->v6.sin6_addr = param->v6.addr;
 	addr->v6.sin6_scope_id = iif;
+
+	return true;
 }
 
 /* Initialize an address parameter from a sctp_addr and return the length

@@ -274,14 +274,19 @@ static void sctp_v4_to_sk_daddr(union sc
 }
 
 /* Initialize a sctp_addr from an address parameter. */
-static void sctp_v4_from_addr_param(union sctp_addr *addr,
+static bool sctp_v4_from_addr_param(union sctp_addr *addr,
 				    union sctp_addr_param *param,
 				    __be16 port, int iif)
 {
+	if (ntohs(param->v4.param_hdr.length) < sizeof(struct sctp_ipv4addr_param))
+		return false;
+
 	addr->v4.sin_family = AF_INET;
 	addr->v4.sin_port = port;
 	addr->v4.sin_addr.s_addr = param->v4.addr.s_addr;
 	memset(addr->v4.sin_zero, 0, sizeof(addr->v4.sin_zero));
+
+	return true;
 }
 
 /* Initialize an address parameter from a sctp_addr and return the length

@@ -2342,11 +2342,13 @@ int sctp_process_init(struct sctp_associ
 
 	/* Process the initialization parameters.  */
 	sctp_walk_params(param, peer_init, init_hdr.params) {
-		if (!src_match && (param.p->type == SCTP_PARAM_IPV4_ADDRESS ||
-		    param.p->type == SCTP_PARAM_IPV6_ADDRESS)) {
+		if (!src_match &&
+		    (param.p->type == SCTP_PARAM_IPV4_ADDRESS ||
+		     param.p->type == SCTP_PARAM_IPV6_ADDRESS)) {
 			af = sctp_get_af_specific(param_type2af(param.p->type));
-			af->from_addr_param(&addr, param.addr,
-					    chunk->sctp_hdr->source, 0);
+			if (!af->from_addr_param(&addr, param.addr,
+						 chunk->sctp_hdr->source, 0))
+				continue;
 			if (sctp_cmp_addr_exact(sctp_source(chunk), &addr))
 				src_match = 1;
 		}

@@ -2540,7 +2542,8 @@ static int sctp_process_param(struct sct
 			break;
 do_addr_param:
 		af = sctp_get_af_specific(param_type2af(param.p->type));
-		af->from_addr_param(&addr, param.addr, htons(asoc->peer.port), 0);
+		if (!af->from_addr_param(&addr, param.addr, htons(asoc->peer.port), 0))
+			break;
 		scope = sctp_scope(peer_addr);
 		if (sctp_in_scope(net, &addr, scope))
 			if (!sctp_assoc_add_peer(asoc, &addr, gfp, SCTP_UNCONFIRMED))

@@ -2633,15 +2636,13 @@ do_addr_param:
 		addr_param = param.v + sizeof(sctp_addip_param_t);
 
 		af = sctp_get_af_specific(param_type2af(addr_param->p.type));
-		if (af == NULL)
+		if (!af)
 			break;
 
-		af->from_addr_param(&addr, addr_param,
-				    htons(asoc->peer.port), 0);
+		if (!af->from_addr_param(&addr, addr_param,
+					 htons(asoc->peer.port), 0))
+			break;
 
-		/* if the address is invalid, we can't process it.
-		 * XXX: see spec for what to do.
-		 */
 		if (!af->addr_valid(&addr, NULL, NULL))
 			break;
 

@@ -3053,7 +3054,8 @@ static __be16 sctp_process_asconf_param(
 	if (unlikely(!af))
 		return SCTP_ERROR_DNS_FAILED;
 
-	af->from_addr_param(&addr, addr_param, htons(asoc->peer.port), 0);
+	if (!af->from_addr_param(&addr, addr_param, htons(asoc->peer.port), 0))
+		return SCTP_ERROR_DNS_FAILED;
 
 	/* ADDIP 4.2.1  This parameter MUST NOT contain a broadcast
 	 * or multicast address.

@@ -3318,7 +3320,8 @@ static void sctp_asconf_param_success(st
 
 	/* We have checked the packet before, so we do not check again.	*/
 	af = sctp_get_af_specific(param_type2af(addr_param->p.type));
-	af->from_addr_param(&addr, addr_param, htons(bp->port), 0);
+	if (!af->from_addr_param(&addr, addr_param, htons(bp->port), 0))
+		return;
 
 	switch (asconf_param->param_hdr.type) {
 	case SCTP_PARAM_ADD_IP:

Hello!

Regressions detected.

While building mxs_defconfig for arm with GCC 8, 9, 10 and 11, the following error was encountered:

/builds/linux/arch/arm/mach-mxs/mach-mxs.c:285:26: warning: duplicate 'const' declaration specifier [-Wduplicate-decl-specifier]

    285 | static const struct gpio const tx28_gpios[] __initconst = {
        |                          ^~~~~
  /builds/linux/drivers/pwm/pwm-mxs.c: In function 'mxs_pwm_probe':
  /builds/linux/drivers/pwm/pwm-mxs.c:164:24: error: implicit declaration of function 'dev_err_probe'; did you mean 'device_reprobe'? [-Werror=implicit-function-declaration]
    164 |                 return dev_err_probe(&pdev->dev, ret, "failed to reset PWM\n");
        |                        ^~~~~~~~~~~~~
        |                        device_reprobe

cc1: some warnings being treated as errors
make[3]: *** [/builds/linux/scripts/Makefile.build:280: drivers/pwm/pwm-mxs.o] Error 1

This is also seen in other branches (from 4.4 to 5.4). To reproduce this build locally:

  tuxmake \
    --target-arch=arm \
    --kconfig=mxs_defconfig \
    --toolchain=gcc-11 \
    --runtime=podman \
    config default kernel xipkernel modules dtbs dtbs-legacy debugkernel headers

Greetings!

Daniel Díaz
[email protected]

All tests passing for Tegra ...

Test results for stable-v4.9:

    8 builds:	8 pass, 0 fail
    16 boots:	16 pass, 0 fail
    32 tests:	32 pass, 0 fail

Linux version: 4.9.284-rc1-g09643351c2e1
Boards tested: tegra124-jetson-tk1, tegra20-ventana,

                tegra210-p2371-2180, tegra30-cardhu-a04

Jon

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

thanks,
-- Shuah

On ARCH_BRCMSTB using 32-bit and 64-bit ARM kernels:

Florian