WARNING in f2fs_fill_super

Status: upstream: reported C repro on 2026/06/19 12:10
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+4ed06283532ebfd44de7@syzkaller.appspotmail.com
First crash: 143d, last: now
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/06/21 linux-5.15.y (ToT) eceeec79dbc6 C [report] WARNING in f2fs_fill_super
2026/06/21 upstream (ToT) 390d73adf896 C Didn't crash

Sample crash report:
F2FS-fs (loop0): Invalid SB checksum offset: 0
F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
F2FS-fs (loop0): Unrecognized mount option "" or missing value
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4395 at kernel/locking/lockdep.c:6467 lockdep_unregister_key+0x4d7/0x520 kernel/locking/lockdep.c:6476
Modules linked in:
CPU: 1 PID: 4395 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:lockdep_unregister_key+0x4d7/0x520 kernel/locking/lockdep.c:6467
Code: 80 00 00 00 75 39 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 59 ec 6b 08 41 f7 c4 00 02 00 00 74 90 fb 84 db 75 8f eb a0 <0f> 0b e9 44 ff ff ff 0f 0b e9 b0 fe ff ff 0f 0b e9 fd fe ff ff e8
RSP: 0018:ffffc9000324f9c0 EFLAGS: 00010002
RAX: 0000000000000000 RBX: ffff88807ac017e0 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000324f940
RBP: ffffc9000324fa90 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000649f28 R12: 0000000000000207
R13: ffff88807ac00000 R14: 0000000000000000 R15: 1ffff92000649f3c
FS:  000055558d9da500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83d4140c80 CR3: 000000005e6a1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_fill_super+0x3ce4/0x7050 fs/f2fs/super.c:4536
 mount_bdev+0x28a/0x3c0 fs/super.c:1411
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1541
 do_new_mount+0x247/0xa50 fs/namespace.c:3060
 do_mount fs/namespace.c:3431 [inline]
 __do_sys_mount fs/namespace.c:3639 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3616
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f83d4158d8a
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:00007ffc20ce5b98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc20ce5c20 RCX: 00007f83d4158d8a
RDX: 0000200000001140 RSI: 0000200000001180 RDI: 00007ffc20ce5be0
RBP: 0000200000001140 R08: 00007ffc20ce5c20 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000001180
R13: 00007ffc20ce5be0 R14: 0000000000005554 R15: 00002000000011c0
 </TASK>

Crashes (23175):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/11/08 19:57 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 00:35 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/06 15:05 linux-5.15.y 700e62ea909a 5cecaf1f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 23:15 linux-5.15.y 700e62ea909a 6969b601 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/30 06:31 linux-5.15.y 792fbe1537d8 b498adee .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1 (corrupt fs)] [mounted in repro #2 (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/28 09:57 linux-5.15.y 792fbe1537d8 96923c60 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/28 09:14 linux-5.15.y 792fbe1537d8 96923c60 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/25 23:31 linux-5.15.y 792fbe1537d8 1d9ca40b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1 (corrupt fs)] [mounted in repro #2 (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/25 07:58 linux-5.15.y 792fbe1537d8 1d9ca40b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/23 02:37 linux-5.15.y 792fbe1537d8 b55fad29 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/17 23:22 linux-5.15.y 792fbe1537d8 432c0077 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/13 03:37 linux-5.15.y a051a4bf909f 745a967f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/12 12:37 linux-5.15.y a051a4bf909f 4f92358f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/12 05:23 linux-5.15.y a051a4bf909f 4f92358f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/11 04:49 linux-5.15.y a051a4bf909f 4f92358f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/07 23:55 linux-5.15.y a051a4bf909f 6520ecdb .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/06 22:47 linux-5.15.y a051a4bf909f f7710056 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/06 22:05 linux-5.15.y a051a4bf909f f7710056 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/10/06 21:24 linux-5.15.y a051a4bf909f f7710056 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/09/22 00:10 linux-5.15.y 0248c33e835e 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/09/21 15:36 linux-5.15.y 0248c33e835e 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/09/21 10:25 linux-5.15.y 0248c33e835e 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/09/15 23:49 linux-5.15.y 0248c33e835e 2daa4bb5 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/08/21 17:30 linux-5.15.y 0eb903b5b519 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/08/05 18:23 linux-5.15.y 6e2fd6534337 52aa2820 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/07/29 13:50 linux-5.15.y 674f684f7c61 19622d9d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1 (clean fs)] [mounted in repro #2 (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/07/07 10:03 linux-5.15.y c86c4726e7f0 8e71ce95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/06/20 13:13 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/06/20 11:54 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 21:20 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 18:53 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 18:48 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 17:48 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 16:42 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 15:56 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 15:48 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 14:47 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 14:11 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 13:09 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 12:55 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 11:46 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 10:43 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 10:34 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 09:26 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 08:15 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 07:42 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 05:51 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 04:50 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 04:17 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 03:57 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 02:37 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 01:41 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 00:45 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/09 00:06 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 22:58 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 21:57 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 20:32 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 18:08 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 17:07 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 15:45 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 13:14 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 12:23 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 12:03 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 11:10 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 10:29 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 09:50 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 09:34 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 08:48 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 07:39 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 06:32 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 06:17 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/08 02:50 linux-5.15.y 29c6cdaac04a 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/06/19 12:10 linux-5.15.y eceeec79dbc6 570c59ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
* Struck through repros no longer work on HEAD.