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[PATCH OLK-6.6] um: ubd: Do not use drvdata in release
by Yuan Can 02 Jan '25

02 Jan '25

From: Tiwei Bie <tiwei.btw(a)antgroup.com> stable inclusion from stable-v6.6.64 commit 2d194d951895df214e066d08146e77cb6e02c1d4 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ CVE: CVE-2024-53184 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 5bee35e5389f450a7eea7318deb9073e9414d3b1 upstream. The drvdata is not available in release. Let's just use container_of() to get the ubd instance. Otherwise, removing a ubd device will result in a crash: RIP: 0033:blk_mq_free_tag_set+0x1f/0xba RSP: 00000000e2083bf0 EFLAGS: 00010246 RAX: 000000006021463a RBX: 0000000000000348 RCX: 0000000062604d00 RDX: 0000000004208060 RSI: 00000000605241a0 RDI: 0000000000000348 RBP: 00000000e2083c10 R08: 0000000062414010 R09: 00000000601603f7 R10: 000000000000133a R11: 000000006038c4bd R12: 0000000000000000 R13: 0000000060213a5c R14: 0000000062405d20 R15: 00000000604f7aa0 Kernel panic - not syncing: Segfault with no mm CPU: 0 PID: 17 Comm: kworker/0:1 Not tainted 6.8.0-rc3-00107-gba3f67c11638 #1 Workqueue: events mc_work_proc Stack: 00000000 604f7ef0 62c5d000 62405d20 e2083c30 6002c776 6002c755 600e47ff e2083c60 6025ffe3 04208060 603d36e0 Call Trace: [<6002c776>] ubd_device_release+0x21/0x55 [<6002c755>] ? ubd_device_release+0x0/0x55 [<600e47ff>] ? kfree+0x0/0x100 [<6025ffe3>] device_release+0x70/0xba [<60381d6a>] kobject_put+0xb5/0xe2 [<6026027b>] put_device+0x19/0x1c [<6026a036>] platform_device_put+0x26/0x29 [<6026ac5a>] platform_device_unregister+0x2c/0x2e [<6002c52e>] ubd_remove+0xb8/0xd6 [<6002bb74>] ? mconsole_reply+0x0/0x50 [<6002b926>] mconsole_remove+0x160/0x1cc [<6002bbbc>] ? mconsole_reply+0x48/0x50 [<6003379c>] ? um_set_signals+0x3b/0x43 [<60061c55>] ? update_min_vruntime+0x14/0x70 [<6006251f>] ? dequeue_task_fair+0x164/0x235 [<600620aa>] ? update_cfs_group+0x0/0x40 [<603a0e77>] ? __schedule+0x0/0x3ed [<60033761>] ? um_set_signals+0x0/0x43 [<6002af6a>] mc_work_proc+0x77/0x91 [<600520b4>] process_scheduled_works+0x1af/0x2c3 [<6004ede3>] ? assign_work+0x0/0x58 [<600527a1>] worker_thread+0x2f7/0x37a [<6004ee3b>] ? set_pf_worker+0x0/0x64 [<6005765d>] ? arch_local_irq_save+0x0/0x2d [<60058e07>] ? kthread_exit+0x0/0x3a [<600524aa>] ? worker_thread+0x0/0x37a [<60058f9f>] kthread+0x130/0x135 [<6002068e>] new_thread_handler+0x85/0xb6 Cc: stable(a)vger.kernel.org Signed-off-by: Tiwei Bie <tiwei.btw(a)antgroup.com> Acked-By: Anton Ivanov <anton.ivanov(a)cambridgegreys.com> Link: https://patch.msgid.link/20241104163203.435515-3-tiwei.btw@antgroup.com Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yuan Can <yuancan(a)huawei.com> --- arch/um/drivers/ubd_kern.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c index ef7b4b911a45..7ddda2c0ae43 100644 --- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -799,7 +799,7 @@ static int ubd_open_dev(struct ubd *ubd_dev) static void ubd_device_release(struct device *dev) { - struct ubd *ubd_dev = dev_get_drvdata(dev); + struct ubd *ubd_dev = container_of(dev, struct ubd, pdev.dev); blk_mq_free_tag_set(&ubd_dev->tag_set); *ubd_dev = ((struct ubd) DEFAULT_UBD); -- 2.22.0

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[PATCH openEuler-1.0-LTS] crypto: bcm - add error check in the ahash_hmac_init function
by Huang Xiaojia 02 Jan '25

02 Jan '25

From: Chen Ridong <chenridong(a)huawei.com> stable inclusion from stable-v4.19.325 commit 8f1a9a960b1107bd0e0ec3736055f5ed0e717edf category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEDPO CVE: CVE-2024-56681 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 19630cf57233e845b6ac57c9c969a4888925467b ] The ahash_init functions may return fails. The ahash_hmac_init should not return ok when ahash_init returns error. For an example, ahash_init will return -ENOMEM when allocation memory is error. Fixes: 9d12ba86f818 ("crypto: brcm - Add Broadcom SPU driver") Signed-off-by: Chen Ridong <chenridong(a)huawei.com> Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Huang Xiaojia <huangxiaojia2(a)huawei.com> --- drivers/crypto/bcm/cipher.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/bcm/cipher.c b/drivers/crypto/bcm/cipher.c index 49c0097fa474..4a2fc97a2d18 100644 --- a/drivers/crypto/bcm/cipher.c +++ b/drivers/crypto/bcm/cipher.c @@ -2514,6 +2514,7 @@ static int ahash_hmac_setkey(struct crypto_ahash *ahash, const u8 *key, static int ahash_hmac_init(struct ahash_request *req) { + int ret; struct iproc_reqctx_s *rctx = ahash_request_ctx(req); struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); struct iproc_ctx_s *ctx = crypto_ahash_ctx(tfm); @@ -2523,7 +2524,9 @@ static int ahash_hmac_init(struct ahash_request *req) flow_log("ahash_hmac_init()\n"); /* init the context as a hash */ - ahash_init(req); + ret = ahash_init(req); + if (ret) + return ret; if (!spu_no_incr_hash(ctx)) { /* SPU-M can do incr hashing but needs sw for outer HMAC */ -- 2.34.1

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[PATCH openEuler-22.03-LTS-SP1 0/2] CVE-2024-45009
by Wang Liang 02 Jan '25

02 Jan '25

Matthieu Baerts (NGI0) (2): mptcp: pm: only decrement add_addr_accepted for MPJ req mptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow net/mptcp/pm_netlink.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) -- 2.34.1

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[PATCH OLK-6.6] io_uring: check for overflows in io_pin_pages
by Long Li 02 Jan '25

02 Jan '25

From: Pavel Begunkov <asml.silence(a)gmail.com> mainline inclusion from mainline-v6.10-rc2 commit 0c0a4eae26ac78379d0c1db053de168a8febc6c9 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAFR CVE: CVE-2024-53187 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- WARNING: CPU: 0 PID: 5834 at io_uring/memmap.c:144 io_pin_pages+0x149/0x180 io_uring/memmap.c:144 CPU: 0 UID: 0 PID: 5834 Comm: syz-executor825 Not tainted 6.12.0-next-20241118-syzkaller #0 Call Trace: <TASK> __io_uaddr_map+0xfb/0x2d0 io_uring/memmap.c:183 io_rings_map io_uring/io_uring.c:2611 [inline] io_allocate_scq_urings+0x1c0/0x650 io_uring/io_uring.c:3470 io_uring_create+0x5b5/0xc00 io_uring/io_uring.c:3692 io_uring_setup io_uring/io_uring.c:3781 [inline] ... </TASK> io_pin_pages()'s uaddr parameter came directly from the user and can be garbage. Don't just add size to it as it can overflow. Cc: stable(a)vger.kernel.org Reported-by: syzbot+2159cbb522b02847c053(a)syzkaller.appspotmail.com Signed-off-by: Pavel Begunkov <asml.silence(a)gmail.com> Link: https://lore.kernel.org/r/1b7520ddb168e1d537d64be47414a0629d0d8f8f.17325810… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Conflicts: io_uring/rsrc.c io_uring/memmap.c [Conflicts due to io_pin_pages() move to io_uring/memmap.c in mainline] Signed-off-by: Long Li <leo.lilong(a)huawei.com> --- io_uring/rsrc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c index 0f9dcde72ebf..7ca3d2d2290e 100644 --- a/io_uring/rsrc.c +++ b/io_uring/rsrc.c @@ -879,7 +879,12 @@ struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages) struct page **pages = NULL; int pret, ret = -ENOMEM; - end = (ubuf + len + PAGE_SIZE - 1) >> PAGE_SHIFT; + if (check_add_overflow(ubuf, len, &end)) + return ERR_PTR(-EOVERFLOW); + if (check_add_overflow(end, PAGE_SIZE - 1, &end)) + return ERR_PTR(-EOVERFLOW); + + end = end >> PAGE_SHIFT; start = ubuf >> PAGE_SHIFT; nr_pages = end - start; -- 2.39.2

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[PATCH OLK-6.6] io_uring/tctx: work around xa_store() allocation error issue
by Long Li 02 Jan '25

02 Jan '25

From: Jens Axboe <axboe(a)kernel.dk> mainline inclusion from mainline-v6.10-rc2 commit 7eb75ce7527129d7f1fee6951566af409a37a1c4 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAP3 CVE: CVE-2024-56584 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found. Reported-by: syzbot+cc36d44ec9f368e443d3(a)syzkaller.appspotmail.com Link: https://lore.kernel.org/io-uring/673c1643.050a0220.87769.0066.GAE@google.co… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Signed-off-by: Long Li <leo.lilong(a)huawei.com> --- io_uring/tctx.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/io_uring/tctx.c b/io_uring/tctx.c index c043fe93a3f2..84f6a8385720 100644 --- a/io_uring/tctx.c +++ b/io_uring/tctx.c @@ -47,8 +47,19 @@ static struct io_wq *io_init_wq_offload(struct io_ring_ctx *ctx, void __io_uring_free(struct task_struct *tsk) { struct io_uring_task *tctx = tsk->io_uring; + struct io_tctx_node *node; + unsigned long index; - WARN_ON_ONCE(!xa_empty(&tctx->xa)); + /* + * Fault injection forcing allocation errors in the xa_store() path + * can lead to xa_empty() returning false, even though no actual + * node is stored in the xarray. Until that gets sorted out, attempt + * an iteration here and warn if any entries are found. + */ + xa_for_each(&tctx->xa, index, node) { + WARN_ON_ONCE(1); + break; + } WARN_ON_ONCE(tctx->io_wq); WARN_ON_ONCE(tctx->cached_refs); -- 2.39.2

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[PATCH OLK-5.10] io_uring/tctx: work around xa_store() allocation error issue
by Long Li 02 Jan '25

02 Jan '25

From: Jens Axboe <axboe(a)kernel.dk> mainline inclusion from mainline-v6.10-rc2 commit 7eb75ce7527129d7f1fee6951566af409a37a1c4 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAP3 CVE: CVE-2024-56584 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found. Reported-by: syzbot+cc36d44ec9f368e443d3(a)syzkaller.appspotmail.com Link: https://lore.kernel.org/io-uring/673c1643.050a0220.87769.0066.GAE@google.co… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Conflicts: io_uring/io_uring.c io_uring/tctx.c [Conflicts due to __io_uring_free() move to io_uring/tctx.c in mainline] Signed-off-by: Long Li <leo.lilong(a)huawei.com> --- io_uring/io_uring.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 6e5e00a7692c..170b3dbf0750 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -8537,8 +8537,19 @@ static int io_uring_alloc_task_context(struct task_struct *task, void __io_uring_free(struct task_struct *tsk) { struct io_uring_task *tctx = tsk->io_uring; + struct io_tctx_node *node; + unsigned long index; - WARN_ON_ONCE(!xa_empty(&tctx->xa)); + /* + * Fault injection forcing allocation errors in the xa_store() path + * can lead to xa_empty() returning false, even though no actual + * node is stored in the xarray. Until that gets sorted out, attempt + * an iteration here and warn if any entries are found. + */ + xa_for_each(&tctx->xa, index, node) { + WARN_ON_ONCE(1); + break; + } WARN_ON_ONCE(tctx->io_wq); WARN_ON_ONCE(tctx->cached_refs); -- 2.39.2

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[PATCH openEuler-22.03-LTS-SP1] io_uring/tctx: work around xa_store() allocation error issue
by Long Li 02 Jan '25

02 Jan '25

From: Jens Axboe <axboe(a)kernel.dk> mainline inclusion from mainline-v6.10-rc2 commit 7eb75ce7527129d7f1fee6951566af409a37a1c4 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAP3 CVE: CVE-2024-56584 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found. Reported-by: syzbot+cc36d44ec9f368e443d3(a)syzkaller.appspotmail.com Link: https://lore.kernel.org/io-uring/673c1643.050a0220.87769.0066.GAE@google.co… Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Conflicts: io_uring/io_uring.c io_uring/tctx.c [Conflicts due to __io_uring_free() move to io_uring/tctx.c in mainline] Signed-off-by: Long Li <leo.lilong(a)huawei.com> --- io_uring/io_uring.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 4d69fb4cf803..e058ce8bb8e2 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -8341,8 +8341,19 @@ static int io_uring_alloc_task_context(struct task_struct *task, void __io_uring_free(struct task_struct *tsk) { struct io_uring_task *tctx = tsk->io_uring; + struct io_tctx_node *node; + unsigned long index; - WARN_ON_ONCE(!xa_empty(&tctx->xa)); + /* + * Fault injection forcing allocation errors in the xa_store() path + * can lead to xa_empty() returning false, even though no actual + * node is stored in the xarray. Until that gets sorted out, attempt + * an iteration here and warn if any entries are found. + */ + xa_for_each(&tctx->xa, index, node) { + WARN_ON_ONCE(1); + break; + } WARN_ON_ONCE(tctx->io_wq); WARN_ON_ONCE(tctx->cached_refs); -- 2.39.2

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[PATCH openEuler-22.03-LTS-SP1] sh: intc: Fix use-after-free bug in register_intc_controller()
by Zhang Kunbo 02 Jan '25

02 Jan '25

From: Dan Carpenter <dan.carpenter(a)linaro.org> stable inclusion from stable-v5.10.231 commit 971b4893457788e0e123ea552f0bb126a5300e61 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAEH CVE: CVE-2024-53165 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 63e72e551942642c48456a4134975136cdcb9b3c ] In the error handling for this function, d is freed without ever removing it from intc_list which would lead to a use after free. To fix this, let's only add it to the list after everything has succeeded. Fixes: 2dcec7a988a1 ("sh: intc: set_irq_wake() support") Signed-off-by: Dan Carpenter <dan.carpenter(a)linaro.org> Reviewed-by: John Paul Adrian Glaubitz <glaubitz(a)physik.fu-berlin.de> Signed-off-by: John Paul Adrian Glaubitz <glaubitz(a)physik.fu-berlin.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhang Kunbo <zhangkunbo(a)huawei.com> --- drivers/sh/intc/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c index f8e070d67fa3..51586c5e993b 100644 --- a/drivers/sh/intc/core.c +++ b/drivers/sh/intc/core.c @@ -194,7 +194,6 @@ int __init register_intc_controller(struct intc_desc *desc) goto err0; INIT_LIST_HEAD(&d->list); - list_add_tail(&d->list, &intc_list); raw_spin_lock_init(&d->lock); INIT_RADIX_TREE(&d->tree, GFP_ATOMIC); @@ -380,6 +379,7 @@ int __init register_intc_controller(struct intc_desc *desc) d->skip_suspend = desc->skip_syscore_suspend; + list_add_tail(&d->list, &intc_list); nr_intc_controllers++; return 0; -- 2.34.1

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[PATCH openEuler-22.03-LTS-SP1] ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read
by Long Li 02 Jan '25

02 Jan '25

From: Jordy Zomer <jordyzomer(a)google.com> mainline inclusion from mainline-v6.10-rc2 commit fc342cf86e2dc4d2edb0fc2ff5e28b6c7845adb9 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAPD CVE: CVE-2024-56627 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- An offset from client could be a negative value, It could lead to an out-of-bounds read from the stream_buf. Note that this issue is coming when setting 'vfs objects = streams_xattr parameter' in ksmbd.conf. Cc: stable(a)vger.kernel.org # v5.15+ Reported-by: Jordy Zomer <jordyzomer(a)google.com> Signed-off-by: Jordy Zomer <jordyzomer(a)google.com> Signed-off-by: Namjae Jeon <linkinjeon(a)kernel.org> Signed-off-by: Steve French <stfrench(a)microsoft.com> Conflicts: fs/ksmbd/smb2pdu.c fs/smb/server/smb2pdu.c [Conflicts due to ksmbd rename to smb/server] Signed-off-by: Long Li <leo.lilong(a)huawei.com> --- fs/ksmbd/smb2pdu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index f104de64493b..b6194837028a 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -6319,6 +6319,10 @@ int smb2_read(struct ksmbd_work *work) } offset = le64_to_cpu(req->Offset); + if (offset < 0) { + err = -EINVAL; + goto out; + } length = le32_to_cpu(req->Length); mincount = le32_to_cpu(req->MinimumCount); -- 2.39.2

2 7

[PATCH OLK-5.10] ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read
by Long Li 02 Jan '25

02 Jan '25

From: Jordy Zomer <jordyzomer(a)google.com> mainline inclusion from mainline-v6.10-rc2 commit fc342cf86e2dc4d2edb0fc2ff5e28b6c7845adb9 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAPD CVE: CVE-2024-56627 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- An offset from client could be a negative value, It could lead to an out-of-bounds read from the stream_buf. Note that this issue is coming when setting 'vfs objects = streams_xattr parameter' in ksmbd.conf. Cc: stable(a)vger.kernel.org # v5.15+ Reported-by: Jordy Zomer <jordyzomer(a)google.com> Signed-off-by: Jordy Zomer <jordyzomer(a)google.com> Signed-off-by: Namjae Jeon <linkinjeon(a)kernel.org> Signed-off-by: Steve French <stfrench(a)microsoft.com> Conflicts: fs/ksmbd/smb2pdu.c fs/smb/server/smb2pdu.c [Conflicts due to ksmbd rename to smb/server] Signed-off-by: Long Li <leo.lilong(a)huawei.com> --- fs/ksmbd/smb2pdu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index f104de64493b..b6194837028a 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -6319,6 +6319,10 @@ int smb2_read(struct ksmbd_work *work) } offset = le64_to_cpu(req->Offset); + if (offset < 0) { + err = -EINVAL; + goto out; + } length = le32_to_cpu(req->Length); mincount = le32_to_cpu(req->MinimumCount); -- 2.39.2

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