general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 1 PID: 187040 Comm: syz-executor.1 Not tainted 5.17.0-next-20220401 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:io_poll_check_events+0x1e3/0x7a0
Code: 68 48 89 d8 48 c7 44 24 60 00 00 00 00 48 c1 e8 03 42 80 3c 28 00 0f 85 55 05 00 00 48 8b 2b 48 8d 7d 28 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 32 05 00 00 48 8b 45 28 48 8d 78 48 48 89 fa
RSP: 0018:ffff888015d77a10 EFLAGS: 00010216
RAX: 0000000000000005 RBX: ffff88806960f500 RCX: ffffc9000c400000
RDX: 0000000000040000 RSI: ffffffff8191f1ea RDI: 0000000000000028
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88806960f587
R10: ffffffff8191f3b6 R11: 0000000000000001 R12: 0000000000000002
R13: dffffc0000000000 R14: ffff88806960f554 R15: ffff88806960f584
FS:  00007fa020f65700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e522000 CR3: 000000003da6c000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 io_apoll_task_func+0x40/0x230
 tctx_task_work+0x1a3/0x1430
 task_work_run+0xe2/0x1a0
 get_signal+0x1cd/0x2350
 arch_do_signal_or_restart+0x88/0x1a40
 exit_to_user_mode_prepare+0x131/0x1a0
 syscall_exit_to_user_mode+0x19/0x50
 do_syscall_64+0x48/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa0239efb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa020f65188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000003 RBX: 00007fa023b02f60 RCX: 00007fa0239efb19
RDX: 0000000000000000 RSI: 0000000000100001 RDI: 0000000000000006
RBP: 00007fa023a49f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeb94a1cff R14: 00007fa020f65300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:io_poll_check_events+0x1e3/0x7a0
Code: 68 48 89 d8 48 c7 44 24 60 00 00 00 00 48 c1 e8 03 42 80 3c 28 00 0f 85 55 05 00 00 48 8b 2b 48 8d 7d 28 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 32 05 00 00 48 8b 45 28 48 8d 78 48 48 89 fa
RSP: 0018:ffff888015d77a10 EFLAGS: 00010216
RAX: 0000000000000005 RBX: ffff88806960f500 RCX: ffffc9000c400000
RDX: 0000000000040000 RSI: ffffffff8191f1ea RDI: 0000000000000028
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88806960f587
R10: ffffffff8191f3b6 R11: 0000000000000001 R12: 0000000000000002
R13: dffffc0000000000 R14: ffff88806960f554 R15: ffff88806960f584
FS:  00007fa020f65700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e522000 CR3: 000000003da6c000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess):
   0:	68 48 89 d8 48       	pushq  $0x48d88948
   5:	c7 44 24 60 00 00 00 	movl   $0x0,0x60(%rsp)
   c:	00
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  16:	0f 85 55 05 00 00    	jne    0x571
  1c:	48 8b 2b             	mov    (%rbx),%rbp
  1f:	48 8d 7d 28          	lea    0x28(%rbp),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	0f 85 32 05 00 00    	jne    0x567
  35:	48 8b 45 28          	mov    0x28(%rbp),%rax
  39:	48 8d 78 48          	lea    0x48(%rax),%rdi
  3d:	48 89 fa             	mov    %rdi,%rdx