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: 138d, 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:
loop0: detected capacity change from 0 to 40427
F2FS-fs (loop0): Unrecognized mount option "age_extent_cache" or missing value
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4376 at kernel/locking/lockdep.c:6467 lockdep_unregister_key+0x4d7/0x520 kernel/locking/lockdep.c:6476
Modules linked in:
CPU: 0 PID: 4376 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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:ffffc900031bf9c0 EFLAGS: 00010002
RAX: 0000000000000000 RBX: ffff88807dabd7e0 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc900031bf940
RBP: ffffc900031bfa90 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000637f28 R12: 0000000000000206
R13: ffff88807dabc000 R14: 0000000000000000 R15: 1ffff92000637f3c
FS:  00005555588d0500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f521faef000 CR3: 000000007517d000 CR4: 00000000003506f0
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: 0033:0x7fbb50abdd8a
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:00007fffd13c1b68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fffd13c1bf0 RCX: 00007fbb50abdd8a
RDX: 0000200000000140 RSI: 0000200000000100 RDI: 00007fffd13c1bb0
RBP: 0000200000000140 R08: 00007fffd13c1bf0 R09: 000000000101880a
R10: 000000000101880a R11: 0000000000000246 R12: 0000200000000100
R13: 00007fffd13c1bb0 R14: 0000000000005505 R15: 0000200000000380
 </TASK>

Crashes (22466):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/11/05 11:57 linux-5.15.y 700e62ea909a 2ee8459f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/05 06:19 linux-5.15.y 700e62ea909a 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/05 05:55 linux-5.15.y 700e62ea909a 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 22:18 linux-5.15.y 700e62ea909a 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 22:11 linux-5.15.y 700e62ea909a 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 21:08 linux-5.15.y 700e62ea909a 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 20:46 linux-5.15.y 700e62ea909a 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 11:54 linux-5.15.y 700e62ea909a 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 11:35 linux-5.15.y 700e62ea909a 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 09:53 linux-5.15.y 700e62ea909a 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 09:29 linux-5.15.y 700e62ea909a 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 01:14 linux-5.15.y 700e62ea909a e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/04 01:08 linux-5.15.y 700e62ea909a e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 21:51 linux-5.15.y 700e62ea909a e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 21:30 linux-5.15.y 700e62ea909a e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 21:18 linux-5.15.y 700e62ea909a e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 19:41 linux-5.15.y 700e62ea909a e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 18:59 linux-5.15.y 700e62ea909a e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 18:50 linux-5.15.y 700e62ea909a e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 11:32 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 10:30 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 07:47 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 06:24 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 03:30 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 03:14 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 01:48 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/03 00:12 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 19:40 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 18:53 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 18:35 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 18:11 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 18:08 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 17:08 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 16:33 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 16:32 linux-5.15.y 700e62ea909a 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 10:00 linux-5.15.y 700e62ea909a 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 08:59 linux-5.15.y 700e62ea909a 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 07:28 linux-5.15.y 700e62ea909a 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 07:18 linux-5.15.y 700e62ea909a 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 04:51 linux-5.15.y 700e62ea909a 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/02 00:55 linux-5.15.y 700e62ea909a 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/01 23:58 linux-5.15.y 700e62ea909a 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in f2fs_fill_super
2026/11/01 23:48 linux-5.15.y 700e62ea909a 25a0ae84 .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.