syzbot


kernel BUG in f2fs_evict_inode (2)

Status: upstream: reported on 2026/01/21 01:58
Reported-by: syzbot+ff87b7972b0c7f1afe81@syzkaller.appspotmail.com
First crash: 5d15h, last: 5d15h
Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in f2fs_evict_inode f2fs -1 C error 135 852d 1131d 23/29 fixed on 2023/10/12 12:47
upstream kernel BUG in f2fs_evict_inode (4) f2fs -1 C done 1595 now 436d 0/29 upstream: reported C repro on 2024/11/16 12:19
linux-4.19 kernel BUG at fs/f2fs/inode.c:LINE! f2fs tmpfs -1 C error 3 1129d 1931d 0/1 upstream: reported C repro on 2020/10/13 04:23
linux-6.1 kernel BUG in f2fs_evict_inode origin:upstream -1 C error 96 5d03h 1021d 0/3 upstream: reported C repro on 2023/04/11 09:45
upstream kernel BUG in f2fs_evict_inode (2) f2fs -1 C error 575 530d 810d 27/29 fixed on 2024/08/14 03:44
linux-5.15 kernel BUG in f2fs_evict_inode (2) missing-backport origin:upstream -1 C done 271 4d02h 811d 0/3 upstream: reported C repro on 2023/11/06 18:33
linux-4.14 kernel BUG in f2fs_evict_inode f2fs tmpfs -1 C 1 1059d 1127d 0/1 upstream: reported C repro on 2022/12/26 05:49
upstream kernel BUG in f2fs_evict_inode (3) f2fs -1 C error 33 478d 526d 28/29 fixed on 2024/10/22 11:57
linux-6.6 kernel BUG in f2fs_evict_inode -1 8 138d 158d 0/2 auto-obsoleted due to no activity on 2025/12/19 03:18
linux-5.15 kernel BUG in f2fs_evict_inode -1 3 1018d 1038d 0/3 auto-obsoleted due to no activity on 2023/08/12 09:15

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/f2fs/inode.c:948!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 13209 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:f2fs_evict_inode+0x1871/0x1890 fs/f2fs/inode.c:948
Code: c6 bf 02 00 00 00 e8 2e de d1 fd 40 84 ed 75 28 e8 94 db d1 fd 4c 8b 2c 24 e9 6a e9 ff ff e8 86 db d1 fd 0f 0b e8 7f db d1 fd <0f> 0b e8 78 db d1 fd 0f 0b e9 0e ff ff ff e8 6c db d1 fd e8 c7 85
RSP: 0018:ffffc9000cbaf940 EFLAGS: 00010293
RAX: ffffffff83b517a1 RBX: ffff888076b92d00 RCX: ffff888022530000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff888076b92d50 R08: ffff888076b931af R09: 1ffff1100ed72635
R10: dffffc0000000000 R11: ffffed100ed72636 R12: dffffc0000000000
R13: ffff88806367c000 R14: 0000000000000002 R15: ffff888076b931a8
FS:  0000555577e73500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe84748b05a CR3: 0000000041d3b000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 evict+0x4ca/0x8d0 fs/inode.c:705
 dispose_list fs/inode.c:738 [inline]
 evict_inodes+0x606/0x6a0 fs/inode.c:792
 generic_shutdown_super+0x97/0x2b0 fs/super.c:672
 kill_block_super+0x44/0x90 fs/super.c:1660
 kill_f2fs_super+0x326/0x3d0 fs/f2fs/super.c:4856
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb6e679bf17
Code: a2 c7 05 7c 96 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff13a78b18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fb6e680471f RCX: 00007fb6e679bf17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff13a78bd0
RBP: 00007fff13a78bd0 R08: 00007fff13a79bd0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff13a79c60
R13: 00007fb6e680471f R14: 00000000000c8f83 R15: 00007fff13a79ca0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_evict_inode+0x1871/0x1890 fs/f2fs/inode.c:948
Code: c6 bf 02 00 00 00 e8 2e de d1 fd 40 84 ed 75 28 e8 94 db d1 fd 4c 8b 2c 24 e9 6a e9 ff ff e8 86 db d1 fd 0f 0b e8 7f db d1 fd <0f> 0b e8 78 db d1 fd 0f 0b e9 0e ff ff ff e8 6c db d1 fd e8 c7 85
RSP: 0018:ffffc9000cbaf940 EFLAGS: 00010293
RAX: ffffffff83b517a1 RBX: ffff888076b92d00 RCX: ffff888022530000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff888076b92d50 R08: ffff888076b931af R09: 1ffff1100ed72635
R10: dffffc0000000000 R11: ffffed100ed72636 R12: dffffc0000000000
R13: ffff88806367c000 R14: 0000000000000002 R15: ffff888076b931a8
FS:  0000555577e73500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6237ca000 CR3: 0000000041d3b000 CR4: 00000000003506f0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/21 01:57 linux-6.6.y cbb31f77b879 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel BUG in f2fs_evict_inode
* Struck through repros no longer work on HEAD.