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: 17814 Comm: syz-executor.1 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vfs_poll include/linux/poll.h:88 [inline]
RIP: 0010:__io_arm_poll_handler+0x34b/0xcf0 fs/io_uring.c:5476
Code: 3c 03 0f 8e f7 06 00 00 41 c7 44 24 18 00 00 00 00 4c 8b 6d 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 07 00 00 48 ba 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffffc9000259fa00 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffff888084f9eb40 RCX: 0000000000000004
RDX: 0000000000000005 RSI: 0000000000000005 RDI: 0000000000000028
RBP: ffff888084f9eb40 R08: ffffc9000259fac8 R09: ffffffff81e357a8
R10: 0000000000000027 R11: 0000000000000006 R12: ffffc9000259fab0
R13: 0000000000000000 R14: ffff888084f9eb70 R15: ffffc9000259facc
FS:  00007f0daa2cd700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056111c429588 CR3: 000000008774f000 CR4: 0000000000350ef0
Call Trace:
 io_poll_add.constprop.0+0xcb/0x380 fs/io_uring.c:5751
 io_issue_sqe+0xe20/0x6ba0 fs/io_uring.c:6569
 __io_queue_sqe+0x90/0xb50 fs/io_uring.c:6864
 io_req_task_submit+0xbf/0x1b0 fs/io_uring.c:2218
 tctx_task_work+0x166/0x610 fs/io_uring.c:2143
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_signal include/linux/tracehook.h:212 [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:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
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:00007f0daa2cd218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 000000000056bf88 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 00007ffc464691bf R14: 00007f0daa2cd300 R15: 0000000000022000
Modules linked in:
---[ end trace 0f8829f1e0cd6661 ]---
RIP: 0010:vfs_poll include/linux/poll.h:88 [inline]
RIP: 0010:__io_arm_poll_handler+0x34b/0xcf0 fs/io_uring.c:5476
Code: 3c 03 0f 8e f7 06 00 00 41 c7 44 24 18 00 00 00 00 4c 8b 6d 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 dc 07 00 00 48 ba 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffffc9000259fa00 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffff888084f9eb40 RCX: 0000000000000004
RDX: 0000000000000005 RSI: 0000000000000005 RDI: 0000000000000028
RBP: ffff888084f9eb40 R08: ffffc9000259fac8 R09: ffffffff81e357a8
R10: 0000000000000027 R11: 0000000000000006 R12: ffffc9000259fab0
R13: 0000000000000000 R14: ffff888084f9eb70 R15: ffffc9000259facc
FS:  00007f0daa2cd700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efe375d1718 CR3: 000000008774f000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess):
   0:	3c 03                	cmp    $0x3,%al
   2:	0f 8e f7 06 00 00    	jle    0x6ff
   8:	41 c7 44 24 18 00 00 	movl   $0x0,0x18(%r12)
   f:	00 00
  11:	4c 8b 6d 00          	mov    0x0(%rbp),%r13
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df
  1f:	49 8d 7d 28          	lea    0x28(%r13),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 dc 07 00 00    	jne    0x810
  34:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  3b:	fc ff df
  3e:	49                   	rex.WB
  3f:	8b                   	.byte 0x8b