smpboot: CPU 1 is now offline
general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 PID: 5193 Comm: kworker/0:10 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events work_for_cpu_fn
RIP: 0010:xlog_cil_pcp_dead+0x2d/0x4c0 fs/xfs/xfs_log_cil.c:1806
Code: 41 56 41 55 41 54 53 48 83 ec 28 89 f5 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 fe 4e 65 fe 48 83 c3 10 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 a4 7b b6 fe 4c 8b 3b 49 8d 9f 58
RSP: 0018:ffffc90003b77a48 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88802fa48000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffe8ffffd4f73f R09: 1ffffd1ffffa9ee7
R10: dffffc0000000000 R11: fffff91ffffa9ee8 R12: dffffc0000000000
R13: ffffffff8cf962e0 R14: ffff888053c3a140 R15: ffff888053c3a000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8c95a56000 CR3: 000000002913a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 xfs_cpu_dead+0x94/0xe0 fs/xfs/xfs_super.c:2260
 cpuhp_invoke_callback+0x423/0x7e0 kernel/cpu.c:192
 __cpuhp_invoke_callback_range kernel/cpu.c:700 [inline]
 cpuhp_invoke_callback_range kernel/cpu.c:724 [inline]
 cpuhp_down_callbacks kernel/cpu.c:1157 [inline]
 _cpu_down+0x4af/0xc90 kernel/cpu.c:1218
 __cpu_down_maps_locked+0x45/0x80 kernel/cpu.c:1249
 work_for_cpu_fn+0x50/0x80 kernel/workqueue.c:5184
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:xlog_cil_pcp_dead+0x2d/0x4c0 fs/xfs/xfs_log_cil.c:1806
Code: 41 56 41 55 41 54 53 48 83 ec 28 89 f5 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 fe 4e 65 fe 48 83 c3 10 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 a4 7b b6 fe 4c 8b 3b 49 8d 9f 58
RSP: 0018:ffffc90003b77a48 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88802fa48000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffe8ffffd4f73f R09: 1ffffd1ffffa9ee7
R10: dffffc0000000000 R11: fffff91ffffa9ee8 R12: dffffc0000000000
R13: ffffffff8cf962e0 R14: ffff888053c3a140 R15: ffff888053c3a000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb202e2b368 CR3: 00000000239c4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	41 56                	push   %r14
   2:	41 55                	push   %r13
   4:	41 54                	push   %r12
   6:	53                   	push   %rbx
   7:	48 83 ec 28          	sub    $0x28,%rsp
   b:	89 f5                	mov    %esi,%ebp
   d:	48 89 fb             	mov    %rdi,%rbx
  10:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  17:	fc ff df
  1a:	e8 fe 4e 65 fe       	call   0xfe654f1d
  1f:	48 83 c3 10          	add    $0x10,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 a4 7b b6 fe       	call   0xfeb67bdd
  39:	4c 8b 3b             	mov    (%rbx),%r15
  3c:	49                   	rex.WB
  3d:	8d                   	.byte 0x8d
  3e:	9f                   	lahf
  3f:	58                   	pop    %rax