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FAILED: patch "[PATCH] ext4: fix hole length calculation overflow in non-extent" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 02c7f7219ac0e2277b3379a3a0e9841ef464b6d4 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082129-kung-accuracy-abdf@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 02c7f7219ac0e2277b3379a3a0e9841ef464b6d4 Mon Sep 17 00:00:00 2001 From: Zhang Yi <yi.zhang(a)huawei.com> Date: Mon, 11 Aug 2025 14:45:32 +0800 Subject: [PATCH] ext4: fix hole length calculation overflow in non-extent inodes In a filesystem with a block size larger than 4KB, the hole length calculation for a non-extent inode in ext4_ind_map_blocks() can easily exceed INT_MAX. Then it could return a zero length hole and trigger the following waring and infinite in the iomap infrastructure. ------------[ cut here ]------------ WARNING: CPU: 3 PID: 434101 at fs/iomap/iter.c:34 iomap_iter_done+0x148/0x190 CPU: 3 UID: 0 PID: 434101 Comm: fsstress Not tainted 6.16.0-rc7+ #128 PREEMPT(voluntary) Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : iomap_iter_done+0x148/0x190 lr : iomap_iter+0x174/0x230 sp : ffff8000880af740 x29: ffff8000880af740 x28: ffff0000db8e6840 x27: 0000000000000000 x26: 0000000000000000 x25: ffff8000880af830 x24: 0000004000000000 x23: 0000000000000002 x22: 000001bfdbfa8000 x21: ffffa6a41c002e48 x20: 0000000000000001 x19: ffff8000880af808 x18: 0000000000000000 x17: 0000000000000000 x16: ffffa6a495ee6cd0 x15: 0000000000000000 x14: 00000000000003d4 x13: 00000000fa83b2da x12: 0000b236fc95f18c x11: ffffa6a4978b9c08 x10: 0000000000001da0 x9 : ffffa6a41c1a2a44 x8 : ffff8000880af5c8 x7 : 0000000001000000 x6 : 0000000000000000 x5 : 0000000000000004 x4 : 000001bfdbfa8000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000004004030000 x0 : 0000000000000000 Call trace: iomap_iter_done+0x148/0x190 (P) iomap_iter+0x174/0x230 iomap_fiemap+0x154/0x1d8 ext4_fiemap+0x110/0x140 [ext4] do_vfs_ioctl+0x4b8/0xbc0 __arm64_sys_ioctl+0x8c/0x120 invoke_syscall+0x6c/0x100 el0_svc_common.constprop.0+0x48/0xf0 do_el0_svc+0x24/0x38 el0_svc+0x38/0x120 el0t_64_sync_handler+0x10c/0x138 el0t_64_sync+0x198/0x1a0 ---[ end trace 0000000000000000 ]--- Cc: stable(a)kernel.org Fixes: facab4d9711e ("ext4: return hole from ext4_map_blocks()") Reported-by: Qu Wenruo <wqu(a)suse.com> Closes: https://lore.kernel.org/linux-ext4/9b650a52-9672-4604-a765-bb6be55d1e4a@gmx… Tested-by: Qu Wenruo <wqu(a)suse.com> Signed-off-by: Zhang Yi <yi.zhang(a)huawei.com> Link: https://patch.msgid.link/20250811064532.1788289-1-yi.zhang@huaweicloud.com Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index 7de327fa7b1c..d45124318200 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -539,7 +539,7 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, int indirect_blks; int blocks_to_boundary = 0; int depth; - int count = 0; + u64 count = 0; ext4_fsblk_t first_block = 0; trace_ext4_ind_map_blocks_enter(inode, map->m_lblk, map->m_len, flags); @@ -588,7 +588,7 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, count++; /* Fill in size of a hole we found */ map->m_pblk = 0; - map->m_len = min_t(unsigned int, map->m_len, count); + map->m_len = umin(map->m_len, count); goto cleanup; }

3 weeks, 1 day

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FAILED: patch "[PATCH] btrfs: subpage: keep TOWRITE tag until folio is cleaned" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x b1511360c8ac882b0c52caa263620538e8d73220 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082107-pellet-wildfire-8e45@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b1511360c8ac882b0c52caa263620538e8d73220 Mon Sep 17 00:00:00 2001 From: Naohiro Aota <naohiro.aota(a)wdc.com> Date: Thu, 31 Jul 2025 12:46:56 +0900 Subject: [PATCH] btrfs: subpage: keep TOWRITE tag until folio is cleaned btrfs_subpage_set_writeback() calls folio_start_writeback() the first time a folio is written back, and it also clears the PAGECACHE_TAG_TOWRITE tag even if there are still dirty blocks in the folio. This can break ordering guarantees, such as those required by btrfs_wait_ordered_extents(). That ordering breakage leads to a real failure. For example, running generic/464 on a zoned setup will hit the following ASSERT. This happens because the broken ordering fails to flush existing dirty pages before the file size is truncated. assertion failed: !list_empty(&ordered->list) :: 0, in fs/btrfs/zoned.c:1899 ------------[ cut here ]------------ kernel BUG at fs/btrfs/zoned.c:1899! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 2 UID: 0 PID: 1906169 Comm: kworker/u130:2 Kdump: loaded Not tainted 6.16.0-rc6-BTRFS-ZNS+ #554 PREEMPT(voluntary) Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.0 02/22/2021 Workqueue: btrfs-endio-write btrfs_work_helper [btrfs] RIP: 0010:btrfs_finish_ordered_zoned.cold+0x50/0x52 [btrfs] RSP: 0018:ffffc9002efdbd60 EFLAGS: 00010246 RAX: 000000000000004c RBX: ffff88811923c4e0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff827e38b1 RDI: 00000000ffffffff RBP: ffff88810005d000 R08: 00000000ffffdfff R09: ffffffff831051c8 R10: ffffffff83055220 R11: 0000000000000000 R12: ffff8881c2458c00 R13: ffff88811923c540 R14: ffff88811923c5e8 R15: ffff8881c1bd9680 FS: 0000000000000000(0000) GS:ffff88a04acd0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f907c7a918c CR3: 0000000004024000 CR4: 0000000000350ef0 Call Trace: <TASK> ? srso_return_thunk+0x5/0x5f btrfs_finish_ordered_io+0x4a/0x60 [btrfs] btrfs_work_helper+0xf9/0x490 [btrfs] process_one_work+0x204/0x590 ? srso_return_thunk+0x5/0x5f worker_thread+0x1d6/0x3d0 ? __pfx_worker_thread+0x10/0x10 kthread+0x118/0x230 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x205/0x260 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Consider process A calling writepages() with WB_SYNC_NONE. In zoned mode or for compressed writes, it locks several folios for delalloc and starts writing them out. Let's call the last locked folio folio X. Suppose the write range only partially covers folio X, leaving some pages dirty. Process A calls btrfs_subpage_set_writeback() when building a bio. This function call clears the TOWRITE tag of folio X, whose size = 8K and the block size = 4K. It is following state. 0 4K 8K |/////|/////| (flag: DIRTY, tag: DIRTY) <-----> Process A will write this range. Now suppose process B concurrently calls writepages() with WB_SYNC_ALL. It calls tag_pages_for_writeback() to tag dirty folios with PAGECACHE_TAG_TOWRITE. Since folio X is still dirty, it gets tagged. Then, B collects tagged folios using filemap_get_folios_tag() and must wait for folio X to be written before returning from writepages(). 0 4K 8K |/////|/////| (flag: DIRTY, tag: DIRTY|TOWRITE) However, between tagging and collecting, process A may call btrfs_subpage_set_writeback() and clear folio X's TOWRITE tag. 0 4K 8K | |/////| (flag: DIRTY|WRITEBACK, tag: DIRTY) As a result, process B won't see folio X in its batch, and returns without waiting for it. This breaks the WB_SYNC_ALL ordering requirement. Fix this by using btrfs_subpage_set_writeback_keepwrite(), which retains the TOWRITE tag. We now manually clear the tag only after the folio becomes clean, via the xas operation. Fixes: 3470da3b7d87 ("btrfs: subpage: introduce helpers for writeback status") CC: stable(a)vger.kernel.org # 6.12+ Reviewed-by: Qu Wenruo <wqu(a)suse.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn(a)wdc.com> Signed-off-by: Naohiro Aota <naohiro.aota(a)wdc.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c index c9b3821957f7..cb4f97833dc3 100644 --- a/fs/btrfs/subpage.c +++ b/fs/btrfs/subpage.c @@ -448,8 +448,25 @@ void btrfs_subpage_set_writeback(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&bfs->lock, flags); bitmap_set(bfs->bitmaps, start_bit, len >> fs_info->sectorsize_bits); + + /* + * Don't clear the TOWRITE tag when starting writeback on a still-dirty + * folio. Doing so can cause WB_SYNC_ALL writepages() to overlook it, + * assume writeback is complete, and exit too early — violating sync + * ordering guarantees. + */ if (!folio_test_writeback(folio)) - folio_start_writeback(folio); + __folio_start_writeback(folio, true); + if (!folio_test_dirty(folio)) { + struct address_space *mapping = folio_mapping(folio); + XA_STATE(xas, &mapping->i_pages, folio->index); + unsigned long flags; + + xas_lock_irqsave(&xas, flags); + xas_load(&xas); + xas_clear_mark(&xas, PAGECACHE_TAG_TOWRITE); + xas_unlock_irqrestore(&xas, flags); + } spin_unlock_irqrestore(&bfs->lock, flags); }

3 weeks, 1 day

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FAILED: patch "[PATCH] btrfs: subpage: keep TOWRITE tag until folio is cleaned" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x b1511360c8ac882b0c52caa263620538e8d73220 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082105-calibrate-trombone-430c@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b1511360c8ac882b0c52caa263620538e8d73220 Mon Sep 17 00:00:00 2001 From: Naohiro Aota <naohiro.aota(a)wdc.com> Date: Thu, 31 Jul 2025 12:46:56 +0900 Subject: [PATCH] btrfs: subpage: keep TOWRITE tag until folio is cleaned btrfs_subpage_set_writeback() calls folio_start_writeback() the first time a folio is written back, and it also clears the PAGECACHE_TAG_TOWRITE tag even if there are still dirty blocks in the folio. This can break ordering guarantees, such as those required by btrfs_wait_ordered_extents(). That ordering breakage leads to a real failure. For example, running generic/464 on a zoned setup will hit the following ASSERT. This happens because the broken ordering fails to flush existing dirty pages before the file size is truncated. assertion failed: !list_empty(&ordered->list) :: 0, in fs/btrfs/zoned.c:1899 ------------[ cut here ]------------ kernel BUG at fs/btrfs/zoned.c:1899! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 2 UID: 0 PID: 1906169 Comm: kworker/u130:2 Kdump: loaded Not tainted 6.16.0-rc6-BTRFS-ZNS+ #554 PREEMPT(voluntary) Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.0 02/22/2021 Workqueue: btrfs-endio-write btrfs_work_helper [btrfs] RIP: 0010:btrfs_finish_ordered_zoned.cold+0x50/0x52 [btrfs] RSP: 0018:ffffc9002efdbd60 EFLAGS: 00010246 RAX: 000000000000004c RBX: ffff88811923c4e0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff827e38b1 RDI: 00000000ffffffff RBP: ffff88810005d000 R08: 00000000ffffdfff R09: ffffffff831051c8 R10: ffffffff83055220 R11: 0000000000000000 R12: ffff8881c2458c00 R13: ffff88811923c540 R14: ffff88811923c5e8 R15: ffff8881c1bd9680 FS: 0000000000000000(0000) GS:ffff88a04acd0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f907c7a918c CR3: 0000000004024000 CR4: 0000000000350ef0 Call Trace: <TASK> ? srso_return_thunk+0x5/0x5f btrfs_finish_ordered_io+0x4a/0x60 [btrfs] btrfs_work_helper+0xf9/0x490 [btrfs] process_one_work+0x204/0x590 ? srso_return_thunk+0x5/0x5f worker_thread+0x1d6/0x3d0 ? __pfx_worker_thread+0x10/0x10 kthread+0x118/0x230 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x205/0x260 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Consider process A calling writepages() with WB_SYNC_NONE. In zoned mode or for compressed writes, it locks several folios for delalloc and starts writing them out. Let's call the last locked folio folio X. Suppose the write range only partially covers folio X, leaving some pages dirty. Process A calls btrfs_subpage_set_writeback() when building a bio. This function call clears the TOWRITE tag of folio X, whose size = 8K and the block size = 4K. It is following state. 0 4K 8K |/////|/////| (flag: DIRTY, tag: DIRTY) <-----> Process A will write this range. Now suppose process B concurrently calls writepages() with WB_SYNC_ALL. It calls tag_pages_for_writeback() to tag dirty folios with PAGECACHE_TAG_TOWRITE. Since folio X is still dirty, it gets tagged. Then, B collects tagged folios using filemap_get_folios_tag() and must wait for folio X to be written before returning from writepages(). 0 4K 8K |/////|/////| (flag: DIRTY, tag: DIRTY|TOWRITE) However, between tagging and collecting, process A may call btrfs_subpage_set_writeback() and clear folio X's TOWRITE tag. 0 4K 8K | |/////| (flag: DIRTY|WRITEBACK, tag: DIRTY) As a result, process B won't see folio X in its batch, and returns without waiting for it. This breaks the WB_SYNC_ALL ordering requirement. Fix this by using btrfs_subpage_set_writeback_keepwrite(), which retains the TOWRITE tag. We now manually clear the tag only after the folio becomes clean, via the xas operation. Fixes: 3470da3b7d87 ("btrfs: subpage: introduce helpers for writeback status") CC: stable(a)vger.kernel.org # 6.12+ Reviewed-by: Qu Wenruo <wqu(a)suse.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn(a)wdc.com> Signed-off-by: Naohiro Aota <naohiro.aota(a)wdc.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c index c9b3821957f7..cb4f97833dc3 100644 --- a/fs/btrfs/subpage.c +++ b/fs/btrfs/subpage.c @@ -448,8 +448,25 @@ void btrfs_subpage_set_writeback(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&bfs->lock, flags); bitmap_set(bfs->bitmaps, start_bit, len >> fs_info->sectorsize_bits); + + /* + * Don't clear the TOWRITE tag when starting writeback on a still-dirty + * folio. Doing so can cause WB_SYNC_ALL writepages() to overlook it, + * assume writeback is complete, and exit too early — violating sync + * ordering guarantees. + */ if (!folio_test_writeback(folio)) - folio_start_writeback(folio); + __folio_start_writeback(folio, true); + if (!folio_test_dirty(folio)) { + struct address_space *mapping = folio_mapping(folio); + XA_STATE(xas, &mapping->i_pages, folio->index); + unsigned long flags; + + xas_lock_irqsave(&xas, flags); + xas_load(&xas); + xas_clear_mark(&xas, PAGECACHE_TAG_TOWRITE); + xas_unlock_irqrestore(&xas, flags); + } spin_unlock_irqrestore(&bfs->lock, flags); }

3 weeks, 1 day

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FAILED: patch "[PATCH] btrfs: subpage: keep TOWRITE tag until folio is cleaned" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x b1511360c8ac882b0c52caa263620538e8d73220 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082104-dad-buzz-9d86@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b1511360c8ac882b0c52caa263620538e8d73220 Mon Sep 17 00:00:00 2001 From: Naohiro Aota <naohiro.aota(a)wdc.com> Date: Thu, 31 Jul 2025 12:46:56 +0900 Subject: [PATCH] btrfs: subpage: keep TOWRITE tag until folio is cleaned btrfs_subpage_set_writeback() calls folio_start_writeback() the first time a folio is written back, and it also clears the PAGECACHE_TAG_TOWRITE tag even if there are still dirty blocks in the folio. This can break ordering guarantees, such as those required by btrfs_wait_ordered_extents(). That ordering breakage leads to a real failure. For example, running generic/464 on a zoned setup will hit the following ASSERT. This happens because the broken ordering fails to flush existing dirty pages before the file size is truncated. assertion failed: !list_empty(&ordered->list) :: 0, in fs/btrfs/zoned.c:1899 ------------[ cut here ]------------ kernel BUG at fs/btrfs/zoned.c:1899! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 2 UID: 0 PID: 1906169 Comm: kworker/u130:2 Kdump: loaded Not tainted 6.16.0-rc6-BTRFS-ZNS+ #554 PREEMPT(voluntary) Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.0 02/22/2021 Workqueue: btrfs-endio-write btrfs_work_helper [btrfs] RIP: 0010:btrfs_finish_ordered_zoned.cold+0x50/0x52 [btrfs] RSP: 0018:ffffc9002efdbd60 EFLAGS: 00010246 RAX: 000000000000004c RBX: ffff88811923c4e0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff827e38b1 RDI: 00000000ffffffff RBP: ffff88810005d000 R08: 00000000ffffdfff R09: ffffffff831051c8 R10: ffffffff83055220 R11: 0000000000000000 R12: ffff8881c2458c00 R13: ffff88811923c540 R14: ffff88811923c5e8 R15: ffff8881c1bd9680 FS: 0000000000000000(0000) GS:ffff88a04acd0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f907c7a918c CR3: 0000000004024000 CR4: 0000000000350ef0 Call Trace: <TASK> ? srso_return_thunk+0x5/0x5f btrfs_finish_ordered_io+0x4a/0x60 [btrfs] btrfs_work_helper+0xf9/0x490 [btrfs] process_one_work+0x204/0x590 ? srso_return_thunk+0x5/0x5f worker_thread+0x1d6/0x3d0 ? __pfx_worker_thread+0x10/0x10 kthread+0x118/0x230 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x205/0x260 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Consider process A calling writepages() with WB_SYNC_NONE. In zoned mode or for compressed writes, it locks several folios for delalloc and starts writing them out. Let's call the last locked folio folio X. Suppose the write range only partially covers folio X, leaving some pages dirty. Process A calls btrfs_subpage_set_writeback() when building a bio. This function call clears the TOWRITE tag of folio X, whose size = 8K and the block size = 4K. It is following state. 0 4K 8K |/////|/////| (flag: DIRTY, tag: DIRTY) <-----> Process A will write this range. Now suppose process B concurrently calls writepages() with WB_SYNC_ALL. It calls tag_pages_for_writeback() to tag dirty folios with PAGECACHE_TAG_TOWRITE. Since folio X is still dirty, it gets tagged. Then, B collects tagged folios using filemap_get_folios_tag() and must wait for folio X to be written before returning from writepages(). 0 4K 8K |/////|/////| (flag: DIRTY, tag: DIRTY|TOWRITE) However, between tagging and collecting, process A may call btrfs_subpage_set_writeback() and clear folio X's TOWRITE tag. 0 4K 8K | |/////| (flag: DIRTY|WRITEBACK, tag: DIRTY) As a result, process B won't see folio X in its batch, and returns without waiting for it. This breaks the WB_SYNC_ALL ordering requirement. Fix this by using btrfs_subpage_set_writeback_keepwrite(), which retains the TOWRITE tag. We now manually clear the tag only after the folio becomes clean, via the xas operation. Fixes: 3470da3b7d87 ("btrfs: subpage: introduce helpers for writeback status") CC: stable(a)vger.kernel.org # 6.12+ Reviewed-by: Qu Wenruo <wqu(a)suse.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn(a)wdc.com> Signed-off-by: Naohiro Aota <naohiro.aota(a)wdc.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c index c9b3821957f7..cb4f97833dc3 100644 --- a/fs/btrfs/subpage.c +++ b/fs/btrfs/subpage.c @@ -448,8 +448,25 @@ void btrfs_subpage_set_writeback(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&bfs->lock, flags); bitmap_set(bfs->bitmaps, start_bit, len >> fs_info->sectorsize_bits); + + /* + * Don't clear the TOWRITE tag when starting writeback on a still-dirty + * folio. Doing so can cause WB_SYNC_ALL writepages() to overlook it, + * assume writeback is complete, and exit too early — violating sync + * ordering guarantees. + */ if (!folio_test_writeback(folio)) - folio_start_writeback(folio); + __folio_start_writeback(folio, true); + if (!folio_test_dirty(folio)) { + struct address_space *mapping = folio_mapping(folio); + XA_STATE(xas, &mapping->i_pages, folio->index); + unsigned long flags; + + xas_lock_irqsave(&xas, flags); + xas_load(&xas); + xas_clear_mark(&xas, PAGECACHE_TAG_TOWRITE); + xas_unlock_irqrestore(&xas, flags); + } spin_unlock_irqrestore(&bfs->lock, flags); }

3 weeks, 1 day

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FAILED: patch "[PATCH] crypto: octeontx2 - Fix address alignment on CN10K A0/A1 and" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 2e13163b43e6bb861182ea999a80dd1d893c0cbf # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082142-trend-rind-de4e@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 2e13163b43e6bb861182ea999a80dd1d893c0cbf Mon Sep 17 00:00:00 2001 From: Bharat Bhushan <bbhushan2(a)marvell.com> Date: Thu, 22 May 2025 15:36:26 +0530 Subject: [PATCH] crypto: octeontx2 - Fix address alignment on CN10K A0/A1 and OcteonTX2 octeontx2 crypto driver allocates memory using kmalloc/kzalloc, and uses this memory for dma (does dma_map_single()). It assumes that kmalloc/kzalloc will return 128-byte aligned address. But kmalloc/kzalloc returns 8-byte aligned address after below changes: "9382bc44b5f5 arm64: allow kmalloc() caches aligned to the smaller cache_line_size() Memory allocated are used for following purpose: - Input data or scatter list address - 8-Byte alignment - Output data or gather list address - 8-Byte alignment - Completion address - 32-Byte alignment. This patch ensures all addresses are aligned as mentioned above. Signed-off-by: Bharat Bhushan <bbhushan2(a)marvell.com> Cc: <stable(a)vger.kernel.org> # v6.5+ Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au> diff --git a/drivers/crypto/marvell/octeontx2/otx2_cpt_reqmgr.h b/drivers/crypto/marvell/octeontx2/otx2_cpt_reqmgr.h index e27e849b01df..98de93851ba1 100644 --- a/drivers/crypto/marvell/octeontx2/otx2_cpt_reqmgr.h +++ b/drivers/crypto/marvell/octeontx2/otx2_cpt_reqmgr.h @@ -34,6 +34,9 @@ #define SG_COMP_2 2 #define SG_COMP_1 1 +#define OTX2_CPT_DPTR_RPTR_ALIGN 8 +#define OTX2_CPT_RES_ADDR_ALIGN 32 + union otx2_cpt_opcode { u16 flags; struct { @@ -417,10 +420,9 @@ static inline struct otx2_cpt_inst_info * otx2_sg_info_create(struct pci_dev *pdev, struct otx2_cpt_req_info *req, gfp_t gfp) { - int align = OTX2_CPT_DMA_MINALIGN; struct otx2_cpt_inst_info *info; - u32 dlen, align_dlen, info_len; - u16 g_sz_bytes, s_sz_bytes; + u32 dlen, info_len; + u16 g_len, s_len; u32 total_mem_len; if (unlikely(req->in_cnt > OTX2_CPT_MAX_SG_IN_CNT || @@ -429,22 +431,54 @@ otx2_sg_info_create(struct pci_dev *pdev, struct otx2_cpt_req_info *req, return NULL; } - g_sz_bytes = ((req->in_cnt + 3) / 4) * - sizeof(struct otx2_cpt_sglist_component); - s_sz_bytes = ((req->out_cnt + 3) / 4) * - sizeof(struct otx2_cpt_sglist_component); + /* Allocate memory to meet below alignment requirement: + * ------------------------------------ + * | struct otx2_cpt_inst_info | + * | (No alignment required) | + * | --------------------------------| + * | | padding for ARCH_DMA_MINALIGN | + * | | alignment | + * |------------------------------------| + * | SG List Header of 8 Byte | + * |------------------------------------| + * | SG List Gather/Input memory | + * | Length = multiple of 32Bytes | + * | Alignment = 8Byte | + * |---------------------------------- | + * | SG List Scatter/Output memory | + * | Length = multiple of 32Bytes | + * | Alignment = 8Byte | + * | -------------------------------| + * | | padding for 32B alignment | + * |------------------------------------| + * | Result response memory | + * | Alignment = 32Byte | + * ------------------------------------ + */ - dlen = g_sz_bytes + s_sz_bytes + SG_LIST_HDR_SIZE; - align_dlen = ALIGN(dlen, align); - info_len = ALIGN(sizeof(*info), align); - total_mem_len = align_dlen + info_len + sizeof(union otx2_cpt_res_s); + info_len = sizeof(*info); + + g_len = ((req->in_cnt + 3) / 4) * + sizeof(struct otx2_cpt_sglist_component); + s_len = ((req->out_cnt + 3) / 4) * + sizeof(struct otx2_cpt_sglist_component); + + dlen = g_len + s_len + SG_LIST_HDR_SIZE; + + /* Allocate extra memory for SG and response address alignment */ + total_mem_len = ALIGN(info_len, OTX2_CPT_DPTR_RPTR_ALIGN); + total_mem_len += (ARCH_DMA_MINALIGN - 1) & + ~(OTX2_CPT_DPTR_RPTR_ALIGN - 1); + total_mem_len += ALIGN(dlen, OTX2_CPT_RES_ADDR_ALIGN); + total_mem_len += sizeof(union otx2_cpt_res_s); info = kzalloc(total_mem_len, gfp); if (unlikely(!info)) return NULL; info->dlen = dlen; - info->in_buffer = (u8 *)info + info_len; + info->in_buffer = PTR_ALIGN((u8 *)info + info_len, ARCH_DMA_MINALIGN); + info->out_buffer = info->in_buffer + SG_LIST_HDR_SIZE + g_len; ((u16 *)info->in_buffer)[0] = req->out_cnt; ((u16 *)info->in_buffer)[1] = req->in_cnt; @@ -460,7 +494,7 @@ otx2_sg_info_create(struct pci_dev *pdev, struct otx2_cpt_req_info *req, } if (setup_sgio_components(pdev, req->out, req->out_cnt, - &info->in_buffer[8 + g_sz_bytes])) { + info->out_buffer)) { dev_err(&pdev->dev, "Failed to setup scatter list\n"); goto destroy_info; } @@ -476,8 +510,10 @@ otx2_sg_info_create(struct pci_dev *pdev, struct otx2_cpt_req_info *req, * Get buffer for union otx2_cpt_res_s response * structure and its physical address */ - info->completion_addr = info->in_buffer + align_dlen; - info->comp_baddr = info->dptr_baddr + align_dlen; + info->completion_addr = PTR_ALIGN((info->in_buffer + dlen), + OTX2_CPT_RES_ADDR_ALIGN); + info->comp_baddr = ALIGN((info->dptr_baddr + dlen), + OTX2_CPT_RES_ADDR_ALIGN); return info;

3 weeks, 1 day

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FAILED: patch "[PATCH] crypto: x86/aegis - Add missing error checks" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 3d9eb180fbe8828cce43bce4c370124685b205c3 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082116-patriot-perfume-1c71@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3d9eb180fbe8828cce43bce4c370124685b205c3 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)kernel.org> Date: Tue, 8 Jul 2025 12:38:29 -0700 Subject: [PATCH] crypto: x86/aegis - Add missing error checks The skcipher_walk functions can allocate memory and can fail, so checking for errors is necessary. Fixes: 1d373d4e8e15 ("crypto: x86 - Add optimized AEGIS implementations") Cc: stable(a)vger.kernel.org Signed-off-by: Eric Biggers <ebiggers(a)kernel.org> Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au> diff --git a/arch/x86/crypto/aegis128-aesni-glue.c b/arch/x86/crypto/aegis128-aesni-glue.c index 3cb5c193038b..f1adfba1a76e 100644 --- a/arch/x86/crypto/aegis128-aesni-glue.c +++ b/arch/x86/crypto/aegis128-aesni-glue.c @@ -104,10 +104,12 @@ static void crypto_aegis128_aesni_process_ad( } } -static __always_inline void +static __always_inline int crypto_aegis128_aesni_process_crypt(struct aegis_state *state, struct skcipher_walk *walk, bool enc) { + int err = 0; + while (walk->nbytes >= AEGIS128_BLOCK_SIZE) { if (enc) aegis128_aesni_enc(state, walk->src.virt.addr, @@ -120,7 +122,8 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, round_down(walk->nbytes, AEGIS128_BLOCK_SIZE)); kernel_fpu_end(); - skcipher_walk_done(walk, walk->nbytes % AEGIS128_BLOCK_SIZE); + err = skcipher_walk_done(walk, + walk->nbytes % AEGIS128_BLOCK_SIZE); kernel_fpu_begin(); } @@ -134,9 +137,10 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, walk->dst.virt.addr, walk->nbytes); kernel_fpu_end(); - skcipher_walk_done(walk, 0); + err = skcipher_walk_done(walk, 0); kernel_fpu_begin(); } + return err; } static struct aegis_ctx *crypto_aegis128_aesni_ctx(struct crypto_aead *aead) @@ -169,7 +173,7 @@ static int crypto_aegis128_aesni_setauthsize(struct crypto_aead *tfm, return 0; } -static __always_inline void +static __always_inline int crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_block *tag_xor, unsigned int cryptlen, bool enc) @@ -178,20 +182,24 @@ crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_ctx *ctx = crypto_aegis128_aesni_ctx(tfm); struct skcipher_walk walk; struct aegis_state state; + int err; if (enc) - skcipher_walk_aead_encrypt(&walk, req, false); + err = skcipher_walk_aead_encrypt(&walk, req, false); else - skcipher_walk_aead_decrypt(&walk, req, false); + err = skcipher_walk_aead_decrypt(&walk, req, false); + if (err) + return err; kernel_fpu_begin(); aegis128_aesni_init(&state, &ctx->key, req->iv); crypto_aegis128_aesni_process_ad(&state, req->src, req->assoclen); - crypto_aegis128_aesni_process_crypt(&state, &walk, enc); - aegis128_aesni_final(&state, tag_xor, req->assoclen, cryptlen); - + err = crypto_aegis128_aesni_process_crypt(&state, &walk, enc); + if (err == 0) + aegis128_aesni_final(&state, tag_xor, req->assoclen, cryptlen); kernel_fpu_end(); + return err; } static int crypto_aegis128_aesni_encrypt(struct aead_request *req) @@ -200,8 +208,11 @@ static int crypto_aegis128_aesni_encrypt(struct aead_request *req) struct aegis_block tag = {}; unsigned int authsize = crypto_aead_authsize(tfm); unsigned int cryptlen = req->cryptlen; + int err; - crypto_aegis128_aesni_crypt(req, &tag, cryptlen, true); + err = crypto_aegis128_aesni_crypt(req, &tag, cryptlen, true); + if (err) + return err; scatterwalk_map_and_copy(tag.bytes, req->dst, req->assoclen + cryptlen, authsize, 1); @@ -216,11 +227,14 @@ static int crypto_aegis128_aesni_decrypt(struct aead_request *req) struct aegis_block tag; unsigned int authsize = crypto_aead_authsize(tfm); unsigned int cryptlen = req->cryptlen - authsize; + int err; scatterwalk_map_and_copy(tag.bytes, req->src, req->assoclen + cryptlen, authsize, 0); - crypto_aegis128_aesni_crypt(req, &tag, cryptlen, false); + err = crypto_aegis128_aesni_crypt(req, &tag, cryptlen, false); + if (err) + return err; return crypto_memneq(tag.bytes, zeros.bytes, authsize) ? -EBADMSG : 0; }

3 weeks, 1 day

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FAILED: patch "[PATCH] crypto: x86/aegis - Add missing error checks" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 3d9eb180fbe8828cce43bce4c370124685b205c3 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082116-muck-spongy-09b0@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3d9eb180fbe8828cce43bce4c370124685b205c3 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)kernel.org> Date: Tue, 8 Jul 2025 12:38:29 -0700 Subject: [PATCH] crypto: x86/aegis - Add missing error checks The skcipher_walk functions can allocate memory and can fail, so checking for errors is necessary. Fixes: 1d373d4e8e15 ("crypto: x86 - Add optimized AEGIS implementations") Cc: stable(a)vger.kernel.org Signed-off-by: Eric Biggers <ebiggers(a)kernel.org> Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au> diff --git a/arch/x86/crypto/aegis128-aesni-glue.c b/arch/x86/crypto/aegis128-aesni-glue.c index 3cb5c193038b..f1adfba1a76e 100644 --- a/arch/x86/crypto/aegis128-aesni-glue.c +++ b/arch/x86/crypto/aegis128-aesni-glue.c @@ -104,10 +104,12 @@ static void crypto_aegis128_aesni_process_ad( } } -static __always_inline void +static __always_inline int crypto_aegis128_aesni_process_crypt(struct aegis_state *state, struct skcipher_walk *walk, bool enc) { + int err = 0; + while (walk->nbytes >= AEGIS128_BLOCK_SIZE) { if (enc) aegis128_aesni_enc(state, walk->src.virt.addr, @@ -120,7 +122,8 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, round_down(walk->nbytes, AEGIS128_BLOCK_SIZE)); kernel_fpu_end(); - skcipher_walk_done(walk, walk->nbytes % AEGIS128_BLOCK_SIZE); + err = skcipher_walk_done(walk, + walk->nbytes % AEGIS128_BLOCK_SIZE); kernel_fpu_begin(); } @@ -134,9 +137,10 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, walk->dst.virt.addr, walk->nbytes); kernel_fpu_end(); - skcipher_walk_done(walk, 0); + err = skcipher_walk_done(walk, 0); kernel_fpu_begin(); } + return err; } static struct aegis_ctx *crypto_aegis128_aesni_ctx(struct crypto_aead *aead) @@ -169,7 +173,7 @@ static int crypto_aegis128_aesni_setauthsize(struct crypto_aead *tfm, return 0; } -static __always_inline void +static __always_inline int crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_block *tag_xor, unsigned int cryptlen, bool enc) @@ -178,20 +182,24 @@ crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_ctx *ctx = crypto_aegis128_aesni_ctx(tfm); struct skcipher_walk walk; struct aegis_state state; + int err; if (enc) - skcipher_walk_aead_encrypt(&walk, req, false); + err = skcipher_walk_aead_encrypt(&walk, req, false); else - skcipher_walk_aead_decrypt(&walk, req, false); + err = skcipher_walk_aead_decrypt(&walk, req, false); + if (err) + return err; kernel_fpu_begin(); aegis128_aesni_init(&state, &ctx->key, req->iv); crypto_aegis128_aesni_process_ad(&state, req->src, req->assoclen); - crypto_aegis128_aesni_process_crypt(&state, &walk, enc); - aegis128_aesni_final(&state, tag_xor, req->assoclen, cryptlen); - + err = crypto_aegis128_aesni_process_crypt(&state, &walk, enc); + if (err == 0) + aegis128_aesni_final(&state, tag_xor, req->assoclen, cryptlen); kernel_fpu_end(); + return err; } static int crypto_aegis128_aesni_encrypt(struct aead_request *req) @@ -200,8 +208,11 @@ static int crypto_aegis128_aesni_encrypt(struct aead_request *req) struct aegis_block tag = {}; unsigned int authsize = crypto_aead_authsize(tfm); unsigned int cryptlen = req->cryptlen; + int err; - crypto_aegis128_aesni_crypt(req, &tag, cryptlen, true); + err = crypto_aegis128_aesni_crypt(req, &tag, cryptlen, true); + if (err) + return err; scatterwalk_map_and_copy(tag.bytes, req->dst, req->assoclen + cryptlen, authsize, 1); @@ -216,11 +227,14 @@ static int crypto_aegis128_aesni_decrypt(struct aead_request *req) struct aegis_block tag; unsigned int authsize = crypto_aead_authsize(tfm); unsigned int cryptlen = req->cryptlen - authsize; + int err; scatterwalk_map_and_copy(tag.bytes, req->src, req->assoclen + cryptlen, authsize, 0); - crypto_aegis128_aesni_crypt(req, &tag, cryptlen, false); + err = crypto_aegis128_aesni_crypt(req, &tag, cryptlen, false); + if (err) + return err; return crypto_memneq(tag.bytes, zeros.bytes, authsize) ? -EBADMSG : 0; }

3 weeks, 1 day

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FAILED: patch "[PATCH] crypto: x86/aegis - Add missing error checks" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 3d9eb180fbe8828cce43bce4c370124685b205c3 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082115-demystify-woozy-fa5f@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3d9eb180fbe8828cce43bce4c370124685b205c3 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)kernel.org> Date: Tue, 8 Jul 2025 12:38:29 -0700 Subject: [PATCH] crypto: x86/aegis - Add missing error checks The skcipher_walk functions can allocate memory and can fail, so checking for errors is necessary. Fixes: 1d373d4e8e15 ("crypto: x86 - Add optimized AEGIS implementations") Cc: stable(a)vger.kernel.org Signed-off-by: Eric Biggers <ebiggers(a)kernel.org> Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au> diff --git a/arch/x86/crypto/aegis128-aesni-glue.c b/arch/x86/crypto/aegis128-aesni-glue.c index 3cb5c193038b..f1adfba1a76e 100644 --- a/arch/x86/crypto/aegis128-aesni-glue.c +++ b/arch/x86/crypto/aegis128-aesni-glue.c @@ -104,10 +104,12 @@ static void crypto_aegis128_aesni_process_ad( } } -static __always_inline void +static __always_inline int crypto_aegis128_aesni_process_crypt(struct aegis_state *state, struct skcipher_walk *walk, bool enc) { + int err = 0; + while (walk->nbytes >= AEGIS128_BLOCK_SIZE) { if (enc) aegis128_aesni_enc(state, walk->src.virt.addr, @@ -120,7 +122,8 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, round_down(walk->nbytes, AEGIS128_BLOCK_SIZE)); kernel_fpu_end(); - skcipher_walk_done(walk, walk->nbytes % AEGIS128_BLOCK_SIZE); + err = skcipher_walk_done(walk, + walk->nbytes % AEGIS128_BLOCK_SIZE); kernel_fpu_begin(); } @@ -134,9 +137,10 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, walk->dst.virt.addr, walk->nbytes); kernel_fpu_end(); - skcipher_walk_done(walk, 0); + err = skcipher_walk_done(walk, 0); kernel_fpu_begin(); } + return err; } static struct aegis_ctx *crypto_aegis128_aesni_ctx(struct crypto_aead *aead) @@ -169,7 +173,7 @@ static int crypto_aegis128_aesni_setauthsize(struct crypto_aead *tfm, return 0; } -static __always_inline void +static __always_inline int crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_block *tag_xor, unsigned int cryptlen, bool enc) @@ -178,20 +182,24 @@ crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_ctx *ctx = crypto_aegis128_aesni_ctx(tfm); struct skcipher_walk walk; struct aegis_state state; + int err; if (enc) - skcipher_walk_aead_encrypt(&walk, req, false); + err = skcipher_walk_aead_encrypt(&walk, req, false); else - skcipher_walk_aead_decrypt(&walk, req, false); + err = skcipher_walk_aead_decrypt(&walk, req, false); + if (err) + return err; kernel_fpu_begin(); aegis128_aesni_init(&state, &ctx->key, req->iv); crypto_aegis128_aesni_process_ad(&state, req->src, req->assoclen); - crypto_aegis128_aesni_process_crypt(&state, &walk, enc); - aegis128_aesni_final(&state, tag_xor, req->assoclen, cryptlen); - + err = crypto_aegis128_aesni_process_crypt(&state, &walk, enc); + if (err == 0) + aegis128_aesni_final(&state, tag_xor, req->assoclen, cryptlen); kernel_fpu_end(); + return err; } static int crypto_aegis128_aesni_encrypt(struct aead_request *req) @@ -200,8 +208,11 @@ static int crypto_aegis128_aesni_encrypt(struct aead_request *req) struct aegis_block tag = {}; unsigned int authsize = crypto_aead_authsize(tfm); unsigned int cryptlen = req->cryptlen; + int err; - crypto_aegis128_aesni_crypt(req, &tag, cryptlen, true); + err = crypto_aegis128_aesni_crypt(req, &tag, cryptlen, true); + if (err) + return err; scatterwalk_map_and_copy(tag.bytes, req->dst, req->assoclen + cryptlen, authsize, 1); @@ -216,11 +227,14 @@ static int crypto_aegis128_aesni_decrypt(struct aead_request *req) struct aegis_block tag; unsigned int authsize = crypto_aead_authsize(tfm); unsigned int cryptlen = req->cryptlen - authsize; + int err; scatterwalk_map_and_copy(tag.bytes, req->src, req->assoclen + cryptlen, authsize, 0); - crypto_aegis128_aesni_crypt(req, &tag, cryptlen, false); + err = crypto_aegis128_aesni_crypt(req, &tag, cryptlen, false); + if (err) + return err; return crypto_memneq(tag.bytes, zeros.bytes, authsize) ? -EBADMSG : 0; }

3 weeks, 1 day

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FAILED: patch "[PATCH] crypto: x86/aegis - Add missing error checks" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 3d9eb180fbe8828cce43bce4c370124685b205c3 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082115-defensive-plasma-31fd@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3d9eb180fbe8828cce43bce4c370124685b205c3 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)kernel.org> Date: Tue, 8 Jul 2025 12:38:29 -0700 Subject: [PATCH] crypto: x86/aegis - Add missing error checks The skcipher_walk functions can allocate memory and can fail, so checking for errors is necessary. Fixes: 1d373d4e8e15 ("crypto: x86 - Add optimized AEGIS implementations") Cc: stable(a)vger.kernel.org Signed-off-by: Eric Biggers <ebiggers(a)kernel.org> Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au> diff --git a/arch/x86/crypto/aegis128-aesni-glue.c b/arch/x86/crypto/aegis128-aesni-glue.c index 3cb5c193038b..f1adfba1a76e 100644 --- a/arch/x86/crypto/aegis128-aesni-glue.c +++ b/arch/x86/crypto/aegis128-aesni-glue.c @@ -104,10 +104,12 @@ static void crypto_aegis128_aesni_process_ad( } } -static __always_inline void +static __always_inline int crypto_aegis128_aesni_process_crypt(struct aegis_state *state, struct skcipher_walk *walk, bool enc) { + int err = 0; + while (walk->nbytes >= AEGIS128_BLOCK_SIZE) { if (enc) aegis128_aesni_enc(state, walk->src.virt.addr, @@ -120,7 +122,8 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, round_down(walk->nbytes, AEGIS128_BLOCK_SIZE)); kernel_fpu_end(); - skcipher_walk_done(walk, walk->nbytes % AEGIS128_BLOCK_SIZE); + err = skcipher_walk_done(walk, + walk->nbytes % AEGIS128_BLOCK_SIZE); kernel_fpu_begin(); } @@ -134,9 +137,10 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, walk->dst.virt.addr, walk->nbytes); kernel_fpu_end(); - skcipher_walk_done(walk, 0); + err = skcipher_walk_done(walk, 0); kernel_fpu_begin(); } + return err; } static struct aegis_ctx *crypto_aegis128_aesni_ctx(struct crypto_aead *aead) @@ -169,7 +173,7 @@ static int crypto_aegis128_aesni_setauthsize(struct crypto_aead *tfm, return 0; } -static __always_inline void +static __always_inline int crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_block *tag_xor, unsigned int cryptlen, bool enc) @@ -178,20 +182,24 @@ crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_ctx *ctx = crypto_aegis128_aesni_ctx(tfm); struct skcipher_walk walk; struct aegis_state state; + int err; if (enc) - skcipher_walk_aead_encrypt(&walk, req, false); + err = skcipher_walk_aead_encrypt(&walk, req, false); else - skcipher_walk_aead_decrypt(&walk, req, false); + err = skcipher_walk_aead_decrypt(&walk, req, false); + if (err) + return err; kernel_fpu_begin(); aegis128_aesni_init(&state, &ctx->key, req->iv); crypto_aegis128_aesni_process_ad(&state, req->src, req->assoclen); - crypto_aegis128_aesni_process_crypt(&state, &walk, enc); - aegis128_aesni_final(&state, tag_xor, req->assoclen, cryptlen); - + err = crypto_aegis128_aesni_process_crypt(&state, &walk, enc); + if (err == 0) + aegis128_aesni_final(&state, tag_xor, req->assoclen, cryptlen); kernel_fpu_end(); + return err; } static int crypto_aegis128_aesni_encrypt(struct aead_request *req) @@ -200,8 +208,11 @@ static int crypto_aegis128_aesni_encrypt(struct aead_request *req) struct aegis_block tag = {}; unsigned int authsize = crypto_aead_authsize(tfm); unsigned int cryptlen = req->cryptlen; + int err; - crypto_aegis128_aesni_crypt(req, &tag, cryptlen, true); + err = crypto_aegis128_aesni_crypt(req, &tag, cryptlen, true); + if (err) + return err; scatterwalk_map_and_copy(tag.bytes, req->dst, req->assoclen + cryptlen, authsize, 1); @@ -216,11 +227,14 @@ static int crypto_aegis128_aesni_decrypt(struct aead_request *req) struct aegis_block tag; unsigned int authsize = crypto_aead_authsize(tfm); unsigned int cryptlen = req->cryptlen - authsize; + int err; scatterwalk_map_and_copy(tag.bytes, req->src, req->assoclen + cryptlen, authsize, 0); - crypto_aegis128_aesni_crypt(req, &tag, cryptlen, false); + err = crypto_aegis128_aesni_crypt(req, &tag, cryptlen, false); + if (err) + return err; return crypto_memneq(tag.bytes, zeros.bytes, authsize) ? -EBADMSG : 0; }

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FAILED: patch "[PATCH] crypto: x86/aegis - Fix sleeping when disallowed on" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x c7f49dadfcdf27e1f747442e874e9baa52ab7674 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025082105-partridge-unboxed-5a0e@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c7f49dadfcdf27e1f747442e874e9baa52ab7674 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)kernel.org> Date: Tue, 8 Jul 2025 12:38:28 -0700 Subject: [PATCH] crypto: x86/aegis - Fix sleeping when disallowed on PREEMPT_RT skcipher_walk_done() can call kfree(), which takes a spinlock, which makes it incorrect to call while preemption is disabled on PREEMPT_RT. Therefore, end the kernel-mode FPU section before calling skcipher_walk_done(), and restart it afterwards. Moreover, pass atomic=false to skcipher_walk_aead_encrypt() instead of atomic=true. The point of atomic=true was to make skcipher_walk_done() safe to call while in a kernel-mode FPU section, but that does not actually work. So just use the usual atomic=false. Fixes: 1d373d4e8e15 ("crypto: x86 - Add optimized AEGIS implementations") Cc: stable(a)vger.kernel.org Signed-off-by: Eric Biggers <ebiggers(a)kernel.org> Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au> diff --git a/arch/x86/crypto/aegis128-aesni-glue.c b/arch/x86/crypto/aegis128-aesni-glue.c index f1b6d40154e3..3cb5c193038b 100644 --- a/arch/x86/crypto/aegis128-aesni-glue.c +++ b/arch/x86/crypto/aegis128-aesni-glue.c @@ -119,7 +119,9 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, walk->dst.virt.addr, round_down(walk->nbytes, AEGIS128_BLOCK_SIZE)); + kernel_fpu_end(); skcipher_walk_done(walk, walk->nbytes % AEGIS128_BLOCK_SIZE); + kernel_fpu_begin(); } if (walk->nbytes) { @@ -131,7 +133,9 @@ crypto_aegis128_aesni_process_crypt(struct aegis_state *state, aegis128_aesni_dec_tail(state, walk->src.virt.addr, walk->dst.virt.addr, walk->nbytes); + kernel_fpu_end(); skcipher_walk_done(walk, 0); + kernel_fpu_begin(); } } @@ -176,9 +180,9 @@ crypto_aegis128_aesni_crypt(struct aead_request *req, struct aegis_state state; if (enc) - skcipher_walk_aead_encrypt(&walk, req, true); + skcipher_walk_aead_encrypt(&walk, req, false); else - skcipher_walk_aead_decrypt(&walk, req, true); + skcipher_walk_aead_decrypt(&walk, req, false); kernel_fpu_begin();

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