syzbot
invalid opcode in hfs_write_inode
Status:
closed as dup on 2026/03/23 00:13
Subsystems:
hfs
[Documentation on labels]
Reported-by: syzbot+2d1037ba71f644cd9246@syzkaller.appspotmail.com
First crash: 141d, last: 15h19m
Sample crash report:
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 1119 Comm: kworker/u8:10 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: writeback wb_workfn (flush-7:2)
RIP: 0010:hfs_write_inode+0x95e/0x990 fs/hfs/inode.c:476
Code: 89 de 81 e6 00 00 00 40 31 ff e8 cd 82 19 ff 81 e3 00 00 00 40 75 15 e8 10 7e 19 ff 4c 89 f3 e9 b1 f7 ff ff e8 03 7e 19 ff 90 <0f> 0b e8 fb 7d 19 ff e8 e6 0a 86 fe eb e4 44 89 e1 80 e1 07 80 c1
RSP: 0018:ffffc90005c871a0 EFLAGS: 00010293
RAX: ffffffff82ac4b5d RBX: f8f8f8f8f8f8f8f8 RCX: ffff888024b11f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005c87328 R08: ffff888024b11f00 R09: 0000000000000003
R10: 0000000000000100 R11: 0000000000000004 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888062da55b8 R15: 1ffff92000b90e38
FS: 0000000000000000(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc131a95b8 CR3: 000000002bee2000 CR4: 00000000003526f0
Call Trace:
<TASK>
write_inode fs/fs-writeback.c:1607 [inline]
__writeback_single_inode+0x6af/0xf90 fs/fs-writeback.c:1850
writeback_sb_inodes+0x9db/0x1ab0 fs/fs-writeback.c:2079
wb_writeback+0x41c/0xad0 fs/fs-writeback.c:2264
wb_do_writeback fs/fs-writeback.c:2432 [inline]
wb_workfn+0x437/0x10f0 fs/fs-writeback.c:2477
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfs_write_inode+0x95e/0x990 fs/hfs/inode.c:476
Code: 89 de 81 e6 00 00 00 40 31 ff e8 cd 82 19 ff 81 e3 00 00 00 40 75 15 e8 10 7e 19 ff 4c 89 f3 e9 b1 f7 ff ff e8 03 7e 19 ff 90 <0f> 0b e8 fb 7d 19 ff e8 e6 0a 86 fe eb e4 44 89 e1 80 e1 07 80 c1
RSP: 0018:ffffc90005c871a0 EFLAGS: 00010293
RAX: ffffffff82ac4b5d RBX: f8f8f8f8f8f8f8f8 RCX: ffff888024b11f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005c87328 R08: ffff888024b11f00 R09: 0000000000000003
R10: 0000000000000100 R11: 0000000000000004 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888062da55b8 R15: 1ffff92000b90e38
FS: 0000000000000000(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc131a95b8 CR3: 000000002bee2000 CR4: 00000000003526f0
* Struck through repros no longer work on HEAD.