syzbot


kernel BUG in clear_inode (5)

Status: upstream: reported C repro on 2026/02/04 00:52
Subsystems: f2fs
[Documentation on labels]
Reported-by: syzbot+fc026e87558558f75c00@syzkaller.appspotmail.com
First crash: 6d01h, last: 5d17h
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [f2fs?] kernel BUG in clear_inode (5) 0 (2) 2026/02/05 11:55
Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in clear_inode (2) jfs -1 C inconclusive 986 243d 468d 28/29 fixed on 2025/06/10 16:19
linux-6.1 kernel BUG in clear_inode origin:upstream missing-backport -1 C inconclusive 30 47d 989d 0/3 upstream: reported C repro on 2023/05/25 23:24
linux-6.6 kernel BUG in clear_inode origin:upstream missing-backport -1 C inconclusive 6 176d 235d 0/2 upstream: reported C repro on 2025/06/18 00:00
upstream kernel BUG in clear_inode (4) f2fs -1 C done 6 120d 151d 29/29 fixed on 2025/10/29 21:02
linux-5.15 kernel BUG in clear_inode (3) missing-backport origin:lts-only -1 C done 25 12d 443d 0/3 upstream: reported C repro on 2024/11/22 00:29
linux-5.15 kernel BUG in clear_inode -1 1 1014d 1014d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:07
upstream kernel BUG in clear_inode (3) jfs -1 C error 637 160d 241d 29/29 fixed on 2025/09/04 16:57
linux-5.15 kernel BUG in clear_inode (2) -1 2 569d 648d 0/3 auto-obsoleted due to no activity on 2024/10/27 05:50
upstream kernel BUG in clear_inode btrfs -1 C 12 476d 618d 28/29 fixed on 2024/10/22 11:57
upstream kernel BUG at fs/inode.c:LINE! (2) fs -1 C done unreliable 322 642d 1990d 25/29 fixed on 2024/05/21 07:00
Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/02/05 11:55 22m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f14faaf3a1fb3b9e4cf2e56269711fb85fba9458 OK log

Sample crash report:
F2FS-fs (loop0): Wrong SSA boundary, start(3584) end(4096) blocks(3072)
F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop0): Image doesn't support compression
F2FS-fs (loop0): invalid crc value
------------[ cut here ]------------
kernel BUG at fs/inode.c:782!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6061 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:clear_inode+0x19a/0x1c0 fs/inode.c:782
Code: 4c 89 f7 e8 08 2f eb ff e9 5a ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 7c a2 4c 89 f7 e8 de 2f eb ff eb 98 e8 47 c7 86 ff 90 <0f> 0b e8 3f c7 86 ff 90 0f 0b e8 37 c7 86 ff 90 0f 0b e8 2f c7 86
RSP: 0018:ffffc90003e17850 EFLAGS: 00010293
RAX: ffffffff823c6d29 RBX: ffff888057a99310 RCX: ffff88802b1edac0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003e179c0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1e8fbef R12: dffffc0000000000
R13: 1ffff920007c2f1c R14: ffff888057a99568 R15: 0000000000000001
FS:  000055557a53e500(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff6ffc5bbc CR3: 0000000034a72000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 evict+0x61e/0xb10 fs/inode.c:837
 f2fs_fill_super+0x54e4/0x6e30 fs/f2fs/super.c:5147
 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1691
 vfs_get_tree+0x92/0x2a0 fs/super.c:1751
 fc_mount fs/namespace.c:1199 [inline]
 do_new_mount_fc fs/namespace.c:3636 [inline]
 do_new_mount+0x329/0xa50 fs/namespace.c:3712
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4201
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff95c0cc14a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd4f028d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd4f028e10 RCX: 00007ff95c0cc14a
RDX: 0000200000000140 RSI: 00002000000001c0 RDI: 00007ffd4f028dd0
RBP: 0000200000000140 R08: 00007ffd4f028e10 R09: 0000000000000008
R10: 0000000000000008 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007ffd4f028dd0 R14: 0000000000005548 R15: 0000200000000200
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:clear_inode+0x19a/0x1c0 fs/inode.c:782
Code: 4c 89 f7 e8 08 2f eb ff e9 5a ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 7c a2 4c 89 f7 e8 de 2f eb ff eb 98 e8 47 c7 86 ff 90 <0f> 0b e8 3f c7 86 ff 90 0f 0b e8 37 c7 86 ff 90 0f 0b e8 2f c7 86
RSP: 0018:ffffc90003e17850 EFLAGS: 00010293
RAX: ffffffff823c6d29 RBX: ffff888057a99310 RCX: ffff88802b1edac0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003e179c0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1e8fbef R12: dffffc0000000000
R13: 1ffff920007c2f1c R14: ffff888057a99568 R15: 0000000000000001
FS:  000055557a53e500(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff6ffc5bbc CR3: 0000000034a72000 CR4: 00000000003526f0

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/03 01:55 upstream dee65f79364c d78927dd .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs kernel BUG in clear_inode
2026/02/03 03:07 upstream dee65f79364c d78927dd .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-snapshot-upstream-root kernel BUG in clear_inode
2026/02/03 02:10 upstream dee65f79364c d78927dd .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-snapshot-upstream-root kernel BUG in clear_inode
2026/02/03 01:11 upstream dee65f79364c d78927dd .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-snapshot-upstream-root kernel BUG in clear_inode
2026/02/02 19:06 upstream 18f7fcd5e69a 018ebef2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in clear_inode
* Struck through repros no longer work on HEAD.