general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 0 PID: 4047 Comm: syz-executor875 Not tainted 5.17.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vfs_poll include/linux/poll.h:86 [inline]
RIP: 0010:io_poll_check_events+0x1d4/0x750 fs/io_uring.c:5945
Code: f0 48 c7 44 24 60 00 00 00 00 48 c1 e8 03 89 54 24 68 80 3c 18 00 0f 85 db 04 00 00 4d 8b 06 49 8d 78 28 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 a7 04 00 00 49 8b 40 28 48 8d 78 48 48 89 f9 48
RSP: 0018:ffffc900026cfca8 EFLAGS: 00010206
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: ffffffff81ca29d6
RDX: 0000000040002038 RSI: 0000000000000004 RDI: 0000000000000028
RBP: ffff88807e178944 R08: 0000000000000000 R09: ffff88807e178947
R10: ffffed100fc2f128 R11: 0000000000000001 R12: ffff88807e178914
R13: 0000000000000001 R14: ffff88807e1788c0 R15: ffff888072478000
FS:  0000555555b54300(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f324e872140 CR3: 000000006e5f6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 io_poll_task_func+0x3c/0x480 fs/io_uring.c:5980
 handle_tw_list fs/io_uring.c:2463 [inline]
 tctx_task_work+0x550/0xf50 fs/io_uring.c:2497
 task_work_run+0xc0/0x160 kernel/task_work.c:164
 tracehook_notify_signal include/linux/tracehook.h:213 [inline]
 handle_signal_work kernel/entry/common.c:146 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x256/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f324e800fe9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff7a11b9f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000200 RBX: 0000000000000000 RCX: 00007f324e800fe9
RDX: 0000000000000000 RSI: 000000000000146f RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f324e7c4870
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vfs_poll include/linux/poll.h:86 [inline]
RIP: 0010:io_poll_check_events+0x1d4/0x750 fs/io_uring.c:5945
Code: f0 48 c7 44 24 60 00 00 00 00 48 c1 e8 03 89 54 24 68 80 3c 18 00 0f 85 db 04 00 00 4d 8b 06 49 8d 78 28 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 a7 04 00 00 49 8b 40 28 48 8d 78 48 48 89 f9 48
RSP: 0018:ffffc900026cfca8 EFLAGS: 00010206
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: ffffffff81ca29d6
RDX: 0000000040002038 RSI: 0000000000000004 RDI: 0000000000000028
RBP: ffff88807e178944 R08: 0000000000000000 R09: ffff88807e178947
R10: ffffed100fc2f128 R11: 0000000000000001 R12: ffff88807e178914
R13: 0000000000000001 R14: ffff88807e1788c0 R15: ffff888072478000
FS:  0000555555b54300(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d5e232f008 CR3: 000000006e5f6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f0 48 c7 44 24 60 00 	lock movq $0x0,0x60(%rsp)
   7:	00 00 00
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	89 54 24 68          	mov    %edx,0x68(%rsp)
  12:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  16:	0f 85 db 04 00 00    	jne    0x4f7
  1c:	4d 8b 06             	mov    (%r14),%r8
  1f:	49 8d 78 28          	lea    0x28(%r8),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	0f 85 a7 04 00 00    	jne    0x4db
  34:	49 8b 40 28          	mov    0x28(%r8),%rax
  38:	48 8d 78 48          	lea    0x48(%rax),%rdi
  3c:	48 89 f9             	mov    %rdi,%rcx
  3f:	48                   	rex.W