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WARNING in jbd2_journal_commit_transaction

Status: upstream: reported C repro on 2026/01/06 19:32
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+01fb42c5bf1035f98ec3@syzkaller.appspotmail.com
First crash: 10d, last: 9d18h
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/01/07 linux-6.1.y (ToT) 50cbba13faa2 C [report] WARNING in jbd2_journal_commit_transaction
2026/01/07 upstream (ToT) f0b9d8eb98df C Didn't crash
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in jbd2_journal_commit_transaction -1 1 5d17h 5d17h 0/3 upstream: reported on 2026/01/11 12:39

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_journal_commit_transaction+0x4340/0x55d8 fs/jbd2/commit.c:413
Modules linked in:
CPU: 1 PID: 4506 Comm: jbd2/loop0-80 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
pc : jbd2_journal_commit_transaction+0x4340/0x55d8 fs/jbd2/commit.c:413
lr : jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
lr : jbd2_journal_commit_transaction+0x4340/0x55d8 fs/jbd2/commit.c:413
sp : ffff800021417880
x29: ffff800021417c60 x28: dfff800000000000 x27: 1fffe0001ab874f7
x26: ffff0000d5c3a0b8 x25: ffff0000d5c3a7bc x24: ffff800021417ba0
x23: ffff800021417bc0 x22: ffff0000d5c3a000 x21: ffff800021417a90
x20: ffff0000d5c3a980 x19: dfff800000000000 x18: ffff800011a5bd40
x17: ffff800018184000 x16: ffff8000082d3a08 x15: ffff800017c65000
x14: 0000000000000000 x13: 1ffff00002a0a0b1 x12: 0000000000ff0100
x11: ff00800008e9ecb8 x10: 0000000000000000 x9 : ffff800008e9ecb8
x8 : ffff0000d39c3780 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 0000000008000000 x0 : 0000000000000000
Call trace:
 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
 jbd2_journal_commit_transaction+0x4340/0x55d8 fs/jbd2/commit.c:413
 kjournald2+0x36c/0x694 fs/jbd2/journal.c:210
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 34
hardirqs last  enabled at (33): [<ffff8000119e52f4>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (33): [<ffff8000119e52f4>] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
hardirqs last disabled at (34): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (0): [<ffff8000081887d4>] copy_process+0x1244/0x3670 kernel/fork.c:2296
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_block_tag_csum_set fs/jbd2/commit.c:361 [inline]
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_journal_commit_transaction+0x1e18/0x55d8 fs/jbd2/commit.c:718
Modules linked in:
CPU: 1 PID: 4506 Comm: jbd2/loop0-80 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
pc : jbd2_block_tag_csum_set fs/jbd2/commit.c:361 [inline]
pc : jbd2_journal_commit_transaction+0x1e18/0x55d8 fs/jbd2/commit.c:718
lr : jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
lr : jbd2_block_tag_csum_set fs/jbd2/commit.c:361 [inline]
lr : jbd2_journal_commit_transaction+0x1e18/0x55d8 fs/jbd2/commit.c:718
sp : ffff800021417880
x29: ffff800021417c60 x28: ffff0000cf630300 x27: ffff0000d5c3a0b0
x26: ffff0000d5c3a0b8 x25: 000000000000001a x24: fffffc0003cf6ac0
x23: ffff0000c0636488 x22: ffff0000c96a3028 x21: ffff0000d5c3a980
x20: 0000000000000002 x19: dfff800000000000 x18: ffff800011a5bd40
x17: ffff800018184000 x16: ffff8000082e9244 x15: 0000000000000000
x14: 0000000000000004 x13: 0000000000ff0100 x12: 0000000000ff0100
x11: ff00800008e9c790 x10: 0000000000000000 x9 : ffff800008e9c790
x8 : ffff0000d39c3780 x7 : ffff800008eb6de0 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082e9358
x2 : ffff800021417ba0 x1 : 0000000008000000 x0 : 0000000000000000
Call trace:
 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
 jbd2_block_tag_csum_set fs/jbd2/commit.c:361 [inline]
 jbd2_journal_commit_transaction+0x1e18/0x55d8 fs/jbd2/commit.c:718
 kjournald2+0x36c/0x694 fs/jbd2/journal.c:210
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 88
hardirqs last  enabled at (87): [<ffff800008a7e100>] bh_lru_install fs/buffer.c:1258 [inline]
hardirqs last  enabled at (87): [<ffff800008a7e100>] __find_get_block+0xbe0/0xdfc fs/buffer.c:1309
hardirqs last disabled at (88): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (68): [<ffff8000081aa3e0>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (68): [<ffff8000081aa3e0>] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624
softirqs last disabled at (37): [<ffff800008020164>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_descriptor_block_csum_set+0x278/0x370 fs/jbd2/journal.c:1044
Modules linked in:
CPU: 1 PID: 4506 Comm: jbd2/loop0-80 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
pc : jbd2_descriptor_block_csum_set+0x278/0x370 fs/jbd2/journal.c:1044
lr : jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
lr : jbd2_descriptor_block_csum_set+0x278/0x370 fs/jbd2/journal.c:1044
sp : ffff8000214177c0
x29: ffff800021417820 x28: ffff0000cf630300 x27: ffff0000d5c3a0b0
x26: ffff8000214177c0 x25: 1ffff00004282ef8 x24: dfff800000000000
x23: ffff0000d5c3a000 x22: 0000000000000000 x21: ffff0000d5c3a980
x20: ffff0000e21081d0 x19: ffff0000d5c3a000 x18: ffff800011a5bd40
x17: ffff800018184000 x16: ffff8000082e9244 x15: 0000000000000000
x14: 0000000000000004 x13: 0000000000ff0100 x12: 0000000000ff0100
x11: ff00800008eb92f8 x10: 0000000000000000 x9 : ffff800008eb92f8
x8 : ffff0000d39c3780 x7 : ffff800008eb6de0 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082e9358
x2 : ffff800021417ba0 x1 : 0000000008000000 x0 : 0000000000000000
Call trace:
 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
 jbd2_descriptor_block_csum_set+0x278/0x370 fs/jbd2/journal.c:1044
 jbd2_journal_commit_transaction+0x19b0/0x55d8 fs/jbd2/commit.c:747
 kjournald2+0x36c/0x694 fs/jbd2/journal.c:210
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 310
hardirqs last  enabled at (309): [<ffff8000118fa268>] el1_dbg+0x6c/0x80 arch/arm64/kernel/entry-common.c:408
hardirqs last disabled at (310): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (302): [<ffff8000081aa3e0>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (302): [<ffff8000081aa3e0>] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624
softirqs last disabled at (91): [<ffff800008020164>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 jbd2_commit_block_csum_set fs/jbd2/commit.c:99 [inline]
WARNING: CPU: 1 PID: 4506 at include/linux/jbd2.h:1731 journal_submit_commit_record+0x65c/0x8d8 fs/jbd2/commit.c:148
Modules linked in:
CPU: 1 PID: 4506 Comm: jbd2/loop0-80 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
pc : jbd2_commit_block_csum_set fs/jbd2/commit.c:99 [inline]
pc : journal_submit_commit_record+0x65c/0x8d8 fs/jbd2/commit.c:148
lr : jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
lr : jbd2_commit_block_csum_set fs/jbd2/commit.c:99 [inline]
lr : journal_submit_commit_record+0x65c/0x8d8 fs/jbd2/commit.c:148
sp : ffff800021417760
x29: ffff800021417820 x28: ffff700004282ef4 x27: ffff0000c96a3a00
x26: ffff0000c96a3a10 x25: ffff0000d5c3a0b0 x24: ffff0000d5c3a980
x23: ffff0000e210fea8 x22: ffff0000d5c3a0b8 x21: ffff0000d5c3a000
x20: ffff0000e210fe80 x19: dfff800000000000 x18: ffff800011a5bd40
x17: ffff800018184000 x16: ffff8000082d3a08 x15: 0000000000000000
x14: 0000000000000406 x13: 1ffff00002a0a0b1 x12: 0000000000ff0100
x11: ff00800008ea072c x10: 0000000000000000 x9 : ffff800008ea072c
x8 : ffff0000d39c3780 x7 : ffff800008ea01f8 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff800021417640 x1 : 0000000008000000 x0 : 0000000000000000
Call trace:
 jbd2_journal_has_csum_v2or3 include/linux/jbd2.h:1730 [inline]
 jbd2_commit_block_csum_set fs/jbd2/commit.c:99 [inline]
 journal_submit_commit_record+0x65c/0x8d8 fs/jbd2/commit.c:148
 jbd2_journal_commit_transaction+0x41a0/0x55d8 fs/jbd2/commit.c:823
 kjournald2+0x36c/0x694 fs/jbd2/journal.c:210
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 468
hardirqs last  enabled at (467): [<ffff8000083c0b24>] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
hardirqs last  enabled at (467): [<ffff8000083c0b24>] ktime_get_coarse_real_ts64+0x114/0x244 kernel/time/timekeeping.c:2261
hardirqs last disabled at (468): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (434): [<ffff8000081aa3e0>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (434): [<ffff8000081aa3e0>] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624
softirqs last disabled at (313): [<ffff800008020164>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/07 03:40 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 WARNING in jbd2_journal_commit_transaction
2026/01/07 02:35 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 WARNING in jbd2_journal_commit_transaction
2026/01/07 00:45 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 WARNING in jbd2_journal_commit_transaction
2026/01/06 23:40 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 WARNING in jbd2_journal_commit_transaction
2026/01/06 22:30 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 WARNING in jbd2_journal_commit_transaction
2026/01/06 21:19 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 WARNING in jbd2_journal_commit_transaction
2026/01/06 19:31 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in jbd2_journal_commit_transaction
* Struck through repros no longer work on HEAD.