netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'.
block nbd0: NBD_DISCONNECT
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2183 Comm: systemd-udevd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
RIP: 0010:trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline]
RIP: 0010:perf_trace_lock_acquire+0x9d/0x530 include/trace/events/lock.h:13
Code: 04 f1 f1 04 f2 c7 40 08 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8d 46 18 48 89 85 40 ff ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 4f 03 00 00 49 8b 7d 18 48 c7 c0 80 14 6a 88 48
RSP: 0018:ffff8882214479f8 EFLAGS: 00010002
RAX: 0000000000000025 RBX: ffff888093f773a8 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000110 RDI: ffffffff89f6d420
RBP: ffff888221447ae0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff89f6d420
R13: 0000000000000110 R14: 0000000000000000 R15: ffff888221447ab8
FS:  00007fed1d6c78c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffffaa97d9c CR3: 0000000050c6f000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x298/0x3c0 kernel/locking/lockdep.c:3907
 flush_workqueue+0x117/0x13e0 kernel/workqueue.c:2661
 nbd_disconnect_and_put+0x100/0x190 drivers/block/nbd.c:1928
 nbd_release+0x144/0x170 drivers/block/nbd.c:1458
 __blkdev_put+0x636/0x870 fs/block_dev.c:1819
 blkdev_close+0x86/0xb0 fs/block_dev.c:1888
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fed1c80d270
Code: 73 01 c3 48 8b 0d 38 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 59 c1 20 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ee fb ff ff 48 89 04 24
RSP: 002b:00007ffffaa98d08 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fed1c80d270
RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007fed1d6c7710 R08: 0000560f4e34fdb0 R09: 0000000000000018
R10: 0000560f4e34b758 R11: 0000000000000246 R12: 0000000000000000
R13: 0000560f4e34e880 R14: 0000000000000003 R15: 000000000000000e
Modules linked in:
---[ end trace f1a5704688e1175a ]---
RIP: 0010:trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline]
RIP: 0010:perf_trace_lock_acquire+0x9d/0x530 include/trace/events/lock.h:13
Code: 04 f1 f1 04 f2 c7 40 08 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8d 46 18 48 89 85 40 ff ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 4f 03 00 00 49 8b 7d 18 48 c7 c0 80 14 6a 88 48
RSP: 0018:ffff8882214479f8 EFLAGS: 00010002
RAX: 0000000000000025 RBX: ffff888093f773a8 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000110 RDI: ffffffff89f6d420
RBP: ffff888221447ae0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff89f6d420
R13: 0000000000000110 R14: 0000000000000000 R15: ffff888221447ab8
FS:  00007fed1d6c78c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffffaa97d9c CR3: 0000000050c6f000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	04 f1                	add    $0xf1,%al
   2:	f1                   	icebp
   3:	04 f2                	add    $0xf2,%al
   5:	c7 40 08 00 f3 f3 f3 	movl   $0xf3f3f300,0x8(%rax)
   c:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  13:	00 00
  15:	48 89 45 d0          	mov    %rax,-0x30(%rbp)
  19:	31 c0                	xor    %eax,%eax
  1b:	48 8d 46 18          	lea    0x18(%rsi),%rax
  1f:	48 89 85 40 ff ff ff 	mov    %rax,-0xc0(%rbp)
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1) <-- trapping instruction
  2e:	0f 85 4f 03 00 00    	jne    0x383
  34:	49 8b 7d 18          	mov    0x18(%r13),%rdi
  38:	48 c7 c0 80 14 6a 88 	mov    $0xffffffff886a1480,%rax
  3f:	48                   	rex.W