syzbot


WARNING: ODEBUG bug in hfsplus_fill_super

Status: upstream: reported on 2026/06/26 10:51
Reported-by: syzbot+06157b5f210cb8c73939@syzkaller.appspotmail.com
First crash: 22h54m, last: 22h54m
Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: ODEBUG bug in hfsplus_fill_super (2) hfs -1 1 1196d 1192d 0/29 auto-obsoleted due to no activity on 2023/06/17 03:45
upstream WARNING: ODEBUG bug in hfsplus_fill_super (3) hfs -1 C inconclusive error 25 344d 707d 0/29 auto-obsoleted due to no activity on 2025/10/26 04:30
upstream WARNING: ODEBUG bug in hfsplus_fill_super (4) hfs -1 1 164d 159d 0/29 auto-obsoleted due to no activity on 2026/03/15 00:52
upstream WARNING: ODEBUG bug in hfsplus_fill_super hfs -1 C 1 3010d 3009d 5/29 fixed on 2018/06/07 13:52
linux-6.1 WARNING: ODEBUG bug in hfsplus_fill_super -1 1 226d 226d 0/3 auto-obsoleted due to no activity on 2026/02/20 20:43

Sample crash report:
WARNING: CPU: 0 PID: 23120 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 23120 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 0 PID: 23120 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x39f/0x520 lib/debugobjects.c:1020
Modules linked in:
CPU: 0 PID: 23120 Comm: syz.3.4498 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
RIP: 0010:debug_check_no_obj_freed+0x39f/0x520 lib/debugobjects.c:1020
Code: 8b 4d 00 48 c7 c7 a0 85 1c 8b 48 c7 c6 00 82 1c 8b 48 c7 c2 20 87 1c 8b 8b 4c 24 1c 4d 89 f8 41 55 e8 e5 4a 20 fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 10 48 b9 00 00 00 00 00 fc ff df ff 05 1a a7 5a
RSP: 0018:ffffc9000cd47738 EFLAGS: 00010282
RAX: 41a8fa3ad69f2e00 RBX: ffffffff974cd148 RCX: 0000000000080000
RDX: ffffc90019829000 RSI: 0000000000032106 RDI: 0000000000032107
RBP: ffffffff8accade0 R08: ffffc9000cd47427 R09: 1ffff920019a8e84
R10: dffffc0000000000 R11: fffff520019a8e85 R12: 0000000000000001
R13: ffffffff82567af0 R14: ffff888043cb6000 R15: ffff888043cb6a38
FS:  00007fb3d59f06c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d04f456b8 CR3: 0000000060282000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 slab_free_hook mm/slub.c:1786 [inline]
 slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1f0 mm/slub.c:3843
 hfsplus_fill_super+0xf4d/0x1e20 fs/hfsplus/super.c:633
 mount_bdev+0x21c/0x2c0 fs/super.c:1643
 legacy_get_tree+0xea/0x180 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x280 fs/super.c:1764
 do_new_mount+0x24a/0xa40 fs/namespace.c:3386
 do_mount fs/namespace.c:3726 [inline]
 __do_sys_mount fs/namespace.c:3935 [inline]
 __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb3d4b9e0ca
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:00007fb3d59efe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb3d59efee0 RCX: 00007fb3d4b9e0ca
RDX: 0000200000000100 RSI: 0000200000002900 RDI: 00007fb3d59efea0
RBP: 0000200000000100 R08: 00007fb3d59efee0 R09: 0000000002000010
R10: 0000000002000010 R11: 0000000000000246 R12: 0000200000002900
R13: 00007fb3d59efea0 R14: 00000000000006e5 R15: 0000200000000c00
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/26 10:50 linux-6.6.y d1cfde2d5d15 7ff32d8b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING: ODEBUG bug in hfsplus_fill_super
* Struck through repros no longer work on HEAD.