general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 1 PID: 138 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: loop5 loop_workfn
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RSP: 0018:ffffc900001f0b70 EFLAGS: 00010002
RAX: 0000000000000038 RBX: ffff88802606aa40 RCX: ffff88801a753c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffff88802606aa47 R09: 1ffff11004c0d548
R10: dffffc0000000000 R11: ffffed1004c0d549 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff88802606aa40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002695f000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 queue_work_on+0x121/0x1e0 kernel/workqueue.c:1835
 queue_work include/linux/workqueue.h:562 [inline]
 iomap_dio_done fs/iomap/direct-io.c:222 [inline]
 iomap_dio_bio_end_io+0x462/0x630 fs/iomap/direct-io.c:235
 req_bio_endio block/blk-mq.c:786 [inline]
 blk_update_request+0x597/0xe40 block/blk-mq.c:931
 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1058
 blk_complete_reqs block/blk-mq.c:1138 [inline]
 blk_done_softirq+0x10b/0x160 block/blk-mq.c:1143
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:raise_softirq+0xfd/0x150 kernel/softirq.c:718
Code: 6a 3a 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 45 41 f7 c7 00 02 00 00 74 01 fb 48 c7 04 24 0e 36 e0 45 <4a> c7 04 33 00 00 00 00 66 42 c7 44 33 09 00 00 42 c6 44 33 0b 00
RSP: 0018:ffffc90002e07820 EFLAGS: 00000206
RAX: fa4b16117f97b200 RBX: 1ffff920005c0f04 RCX: fa4b16117f97b200
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: ffffffff8afc73a0
RBP: ffffc90002e078d0 R08: ffffffff90d96617 R09: 1ffffffff21b2cc2
R10: dffffc0000000000 R11: fffffbfff21b2cc3 R12: 0000000000000004
R13: 1ffff110042ba840 R14: dffffc0000000000 R15: 0000000000000a02
 blk_mq_raise_softirq block/blk-mq.c:1199 [inline]
 blk_mq_complete_request_remote+0x4e1/0x6c0 block/blk-mq.c:1223
 blk_mq_complete_request+0x19/0xa0 block/blk-mq.c:1239
 loop_handle_cmd drivers/block/loop.c:1950 [inline]
 loop_process_work+0x185b/0x1ed0 drivers/block/loop.c:1968
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RSP: 0018:ffffc900001f0b70 EFLAGS: 00010002
RAX: 0000000000000038 RBX: ffff88802606aa40 RCX: ffff88801a753c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffff88802606aa47 R09: 1ffff11004c0d548
R10: dffffc0000000000 R11: ffffed1004c0d549 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff88802606aa40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002695f000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	ee                   	out    %al,(%dx)
   1:	e8 ad 38 2f 00       	call   0x2f38b3
   6:	85 ed                	test   %ebp,%ebp
   8:	0f 85 db 0c 00 00    	jne    0xce9
   e:	e8 f0 34 2f 00       	call   0x2f3503
  13:	48 89 1c 24          	mov    %rbx,(%rsp)
  17:	49 8d af c0 01 00 00 	lea    0x1c0(%r15),%rbp
  1e:	48 89 e8             	mov    %rbp,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	48 89 44 24 48       	mov    %rax,0x48(%rsp)
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 05 0d 00 00    	jne    0xd3c
  37:	8b 5d 00             	mov    0x0(%rbp),%ebx
  3a:	89 de                	mov    %ebx,%esi
  3c:	81                   	.byte 0x81
  3d:	e6 00                	out    %al,$0x0
  3f:	80                   	.byte 0x80