kernel BUG in ocfs2_populate_inode

Status: upstream: reported C repro on 2026/05/13 08:33
Reported-by: syzbot+9461958fcca348fee7bc@syzkaller.appspotmail.com
First crash: 91d, last: 29d
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2026/07/20 upstream (ToT) 1590cf032971 C Failed due to an error; will retry later
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in ocfs2_populate_inode prio:normal ocfs2 -1 syz, C inconclusive inconclusive 69 3d12h 687d 0/29 upstream: reported C repro on 2024/09/24 05:20
linux-5.15 kernel BUG in ocfs2_populate_inode origin:upstream -1 syz, C error 5 7d13h 525d 0/3 upstream: reported C repro on 2025/03/04 21:06
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2026/07/13 16:28 2h57m bisect fix linux-6.1.y OK (0) job log log
2026/06/12 13:56 2h00m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
loop0: detected capacity change from 0 to 32768
------------[ cut here ]------------
kernel BUG at fs/ocfs2/inode.c:336!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4521 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : ocfs2_populate_inode+0x14ec/0x1570 fs/ocfs2/inode.c:336
lr : ocfs2_populate_inode+0x14ec/0x1570 fs/ocfs2/inode.c:336
sp : ffff8000213f6b60
x29: ffff8000213f6c60 x28: ffff0000f2396e2c x27: 1fffe0001e472dc5
x26: ffff0000f2396e50 x25: 1fffe0001e472dca x24: ffff70000427ed80
x23: ffff80001521d160 x22: ffff0000f2396e00 x21: dfff800000000000
x20: 0000000000000031 x19: ffff0000e55ecfb8 x18: ffff800011b9bf60
x17: 1fffe00033ea637e x16: ffff8000082d92bc x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe0001cabda36 x12: 0000000000ff0100
x11: ff00800009d71350 x10: 0000000000000000 x9 : ffff800009d71350
x8 : ffff0000c60b0000 x7 : ffff800008257984 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800009d700e0
x2 : 0000000000000001 x1 : 0000000000000020 x0 : 0000000000000000
Call trace:
 ocfs2_populate_inode+0x14ec/0x1570 fs/ocfs2/inode.c:336
 ocfs2_read_locked_inode fs/ocfs2/inode.c:542 [inline]
 ocfs2_iget+0xb84/0x1a20 fs/ocfs2/inode.c:159
 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:142 [inline]
 ocfs2_get_system_file_inode+0x2e8/0x690 fs/ocfs2/sysfile.c:112
 ocfs2_init_global_system_inodes+0x2a0/0x5c8 fs/ocfs2/super.c:457
 ocfs2_initialize_super fs/ocfs2/super.c:2253 [inline]
 ocfs2_fill_super+0x2408/0x436c fs/ocfs2/super.c:994
 mount_bdev+0x264/0x358 fs/super.c:1443
 ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1186
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x228/0x810 fs/namespace.c:3078
 path_mount+0x5bc/0xe80 fs/namespace.c:3408
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: f9403bfc f9404bfb 17fffcda 979ce8b3 (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/13 08:32 linux-6.1.y ad16b162f21d a0949470 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in ocfs2_populate_inode
* Struck through repros no longer work on HEAD.