WARNING in f2fs_rename2 (2)

Status: fixed on 2026/01/07 12:29
Subsystems: f2fs
[Documentation on labels]
Reported-by: syzbot+632cf32276a9a564188d@syzkaller.appspotmail.com
Fix commit: d33f89b34aa3 f2fs: invalidate dentry cache on failed whiteout creation
First crash: 287d, last: 272d
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH v2] f2fs: invalidate dentry cache on failed whiteout creation 3 (3) 2025/11/11 22:50
[PATCH] f2fs: invalidate dentry cache on failed whiteout creation 3 (3) 2025/10/27 12:17
[syzbot] [f2fs?] WARNING in f2fs_rename2 (2) 0 (3) 2025/10/22 16:30
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in f2fs_rename2 origin:lts-only -1 C error 15 7h23m 215d 0/3 upstream: reported C repro on 2025/12/22 13:22
upstream WARNING in f2fs_rename2 f2fs -1 C done 66 489d 607d 0/29 closed as dup on 2025/02/11 07:37
linux-5.15 WARNING in f2fs_rename2 missing-backport origin:upstream -1 C error 3 9d02h 561d 0/3 upstream: reported C repro on 2025/01/10 15:28
linux-6.6 WARNING in f2fs_rename2 origin:lts-only -1 C error 4 120d 149d 0/2 upstream: reported C repro on 2026/02/27 08:52
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2025/10/26 11:34 21m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/10/26 11:34 21m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/10/26 11:34 21m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/10/26 11:34 19m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/10/22 16:30 25m kartikey406@gmail.com patch upstream OK log
2025/10/22 09:09 56m kartikey406@gmail.com patch upstream OK log

Sample crash report:
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4
F2FS-fs (loop0): Corrupted max_depth of 3: 16842753
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6707 at fs/inode.c:417 drop_nlink+0xe4/0x138 fs/inode.c:417
Modules linked in:
CPU: 0 UID: 0 PID: 6707 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : drop_nlink+0xe4/0x138 fs/inode.c:417
lr : drop_nlink+0xe4/0x138 fs/inode.c:417
sp : ffff80009e187740
x29: ffff80009e187740 x28: 0000000000000000 x27: ffff0000d416503f
x26: ffff0000f68508f8 x25: ffff0000f69f08f8 x24: 0000000000000000
x23: 1fffe0001ed0a247 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000f6851238 x19: ffff0000f68511f0 x18: 00000000ffffffff
x17: ffff800093605000 x16: ffff800080528494 x15: 0000000000000001
x14: 1fffe0001ed0a2d5 x13: 0000000000000000 x12: 0000000000000000
x11: ffff60001ed0a2d6 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000c7453d00 x7 : ffff80008269f9fc x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008052866c
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 drop_nlink+0xe4/0x138 fs/inode.c:417 (P)
 f2fs_i_links_write fs/f2fs/f2fs.h:3233 [inline]
 f2fs_rename fs/f2fs/namei.c:1017 [inline]
 f2fs_rename2+0x1288/0x1fb4 fs/f2fs/namei.c:1290
 vfs_rename+0x934/0xce0 fs/namei.c:5129
 do_renameat2+0x614/0x8c8 fs/namei.c:5278
 __do_sys_renameat2 fs/namei.c:5312 [inline]
 __se_sys_renameat2 fs/namei.c:5309 [inline]
 __arm64_sys_renameat2+0xd8/0xf4 fs/namei.c:5309
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 170020
hardirqs last  enabled at (170019): [<ffff800080630af8>] seqcount_lockdep_reader_access+0x7c/0xf8 include/linux/seqlock.h:74
hardirqs last disabled at (170020): [<ffff80008b05ee64>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434
softirqs last  enabled at (169238): [<ffff800080202608>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (169236): [<ffff8000802025d4>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/12 10:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc ff1712fe .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 WARNING in f2fs_rename2
2025/10/12 09:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc ff1712fe .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 WARNING in f2fs_rename2
2025/10/12 09:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc ff1712fe .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 WARNING in f2fs_rename2
2025/10/12 08:14 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc ff1712fe .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 WARNING in f2fs_rename2
2025/10/12 07:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in f2fs_rename2
* Struck through repros no longer work on HEAD.