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kernel BUG in f2fs_sync_node_pages

Status: fixed on 2025/09/25 12:43
Subsystems: f2fs
[Documentation on labels]
Reported-by: syzbot+bcdfadd9bda9988fa52a@syzkaller.appspotmail.com
Fix commit: 6dea74e454c2 f2fs: Fix __write_node_folio() conversion
First crash: 119d, last: 34d
Cause bisection: introduced by (bisect log) :
commit 80f31d2a7e5f4efa7150c951268236c670bcb068
Author: Christoph Hellwig <hch@lst.de>
Date: Thu May 8 05:14:32 2025 +0000

  f2fs: return bool from __write_node_folio

Crash: kernel BUG in f2fs_sync_node_pages (log)
Repro: C syz .config
  
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[syzbot] [f2fs?] kernel BUG in f2fs_sync_node_pages 1 (2) 2025/09/24 02:34
[syzbot] Monthly f2fs report (Aug 2025) 0 (1) 2025/08/01 13:49
[syzbot] Monthly f2fs report (Jul 2025) 0 (1) 2025/07/01 09:24
▶ ▼ Last patch testing requests (7)
Created Duration User Patch Repo Result
2025/09/22 19:41 44m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2025/07/15 09:24 21m retest repro upstream OK log
2025/07/15 09:24 22m retest repro upstream OK log
2025/07/15 09:24 21m retest repro upstream OK log
2025/07/15 09:24 1h22m retest repro upstream OK log
2025/07/15 09:24 47m retest repro upstream OK log
2025/07/14 18:01 16m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci error
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2025/09/05 04:26 2h02m bisect fix upstream OK (0) job log log
2025/07/30 20:20 2h05m bisect fix upstream OK (0) job log log

Sample crash report:
 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
------------[ cut here ]------------
kernel BUG at mm/filemap.c:1498!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.16.0-rc3-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:folio_unlock+0x13d/0x160 mm/filemap.c:1498
Code: d9 c8 ff 48 89 df 48 c7 c6 60 37 94 8b e8 ab 73 0e 00 90 0f 0b e8 e3 d9 c8 ff 48 89 df 48 c7 c6 80 2d 94 8b e8 94 73 0e 00 90 <0f> 0b e8 cc d9 c8 ff 48 89 df 48 c7 c6 60 37 94 8b e8 7d 73 0e 00
RSP: 0018:ffffc90000126e28 EFLAGS: 00010246
RAX: f58d06f6546c6800 RBX: ffffea0000e967c0 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8d96eaae RDI: 00000000ffffffff
RBP: ffffc90000127110 R08: ffffffff8f9fe0f7 R09: 1ffffffff1f3fc1e
R10: dffffc0000000000 R11: fffffbfff1f3fc1f R12: 1ffffd40001d2cf9
R13: 00fff00000004138 R14: ffffea0000e967c8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125d85000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d087ce8660 CR3: 00000000b2b26000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_sync_node_pages+0x180a/0x1a10 fs/f2fs/node.c:2081
 f2fs_write_node_pages+0x303/0x6e0 fs/f2fs/node.c:2183
 do_writepages+0x32e/0x550 mm/page-writeback.c:2636
 __writeback_single_inode+0x145/0xff0 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x6b5/0x1000 fs/fs-writeback.c:1976
 wb_writeback+0x43b/0xaf0 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x409/0xef0 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_unlock+0x13d/0x160 mm/filemap.c:1498
Code: d9 c8 ff 48 89 df 48 c7 c6 60 37 94 8b e8 ab 73 0e 00 90 0f 0b e8 e3 d9 c8 ff 48 89 df 48 c7 c6 80 2d 94 8b e8 94 73 0e 00 90 <0f> 0b e8 cc d9 c8 ff 48 89 df 48 c7 c6 60 37 94 8b e8 7d 73 0e 00
RSP: 0018:ffffc90000126e28 EFLAGS: 00010246
RAX: f58d06f6546c6800 RBX: ffffea0000e967c0 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8d96eaae RDI: 00000000ffffffff
RBP: ffffc90000127110 R08: ffffffff8f9fe0f7 R09: 1ffffffff1f3fc1e
R10: dffffc0000000000 R11: fffffbfff1f3fc1f R12: 1ffffd40001d2cf9
R13: 00fff00000004138 R14: ffffea0000e967c8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125c85000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a81bc0000 CR3: 00000000335d8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4275):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/23 23:16 upstream 86731a2a651e e2f27c35 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in f2fs_sync_node_pages
2025/06/23 11:36 upstream 86731a2a651e d6cdfb8a .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in f2fs_sync_node_pages
2025/06/22 21:47 upstream b67ec639010f d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root kernel BUG in f2fs_sync_node_pages
2025/06/21 19:18 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in f2fs_sync_node_pages
2025/06/12 01:37 upstream 488ef3560196 98683f8f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in f2fs_sync_node_pages
2025/06/12 00:35 upstream 488ef3560196 98683f8f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in f2fs_sync_node_pages
2025/06/11 23:31 upstream 488ef3560196 98683f8f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in f2fs_sync_node_pages
2025/06/11 22:35 upstream 488ef3560196 98683f8f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in f2fs_sync_node_pages
2025/06/16 06:04 upstream 08215f5486ec 5f4b362d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in f2fs_sync_node_pages
2025/06/19 11:11 linux-next 6e5ab6fee68d ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in f2fs_sync_node_pages
2025/06/30 17:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 16:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 14:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 13:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 12:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 10:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 08:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 07:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 04:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 03:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 02:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/30 01:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 23:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 22:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 20:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 20:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 18:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 17:19 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 16:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 15:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 13:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 12:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 11:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 10:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 09:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 07:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 06:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 05:19 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 03:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 02:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 01:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/29 00:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 23:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 21:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 20:38 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 19:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 18:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 17:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 15:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 15:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 14:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 13:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 12:02 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 10:02 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/28 06:40 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
2025/06/23 07:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 kernel BUG in f2fs_sync_node_pages
* Struck through repros no longer work on HEAD.