general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087]
CPU: 1 PID: 7562 Comm: syz-executor.4 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_accept fs/io_uring.c:5041 [inline]
RIP: 0010:io_issue_sqe+0x2522/0x6ba0 fs/io_uring.c:6596
Code: 48 c1 ea 03 80 3c 02 00 0f 85 66 42 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 27 49 8d bc 24 80 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 47 42 00 00 45 8b ac 24 80 00
RSP: 0018:ffffc9000a39fb28 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90012426000
RDX: 0000000000000010 RSI: ffffffff81e341dd RDI: 0000000000000080
RBP: ffff888079ab029c R08: 0000000000000000 R09: ffffffff81e31f08
R10: ffffffff81e341cf R11: 000000000000000d R12: 0000000000000000
R13: 1ffff1100f356059 R14: 0000000000000003 R15: ffff888079ab0280
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0063) knlGS:00000000f551db40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000080bb190 CR3: 00000000219dc000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __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_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f23549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f551d5fc EFLAGS: 00000296 ORIG_RAX: 00000000000001aa
RAX: 0000000000000002 RBX: 0000000000000003 RCX: 0000000000002a6e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000c000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace e9faa8160a0b2a1d ]---
RIP: 0010:io_accept fs/io_uring.c:5041 [inline]
RIP: 0010:io_issue_sqe+0x2522/0x6ba0 fs/io_uring.c:6596
Code: 48 c1 ea 03 80 3c 02 00 0f 85 66 42 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 27 49 8d bc 24 80 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 47 42 00 00 45 8b ac 24 80 00
RSP: 0018:ffffc9000a39fb28 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90012426000
RDX: 0000000000000010 RSI: ffffffff81e341dd RDI: 0000000000000080
RBP: ffff888079ab029c R08: 0000000000000000 R09: ffffffff81e31f08
R10: ffffffff81e341cf R11: 000000000000000d R12: 0000000000000000
R13: 1ffff1100f356059 R14: 0000000000000003 R15: ffff888079ab0280
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0063) knlGS:00000000f551db40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000000050 CR3: 00000000219dc000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 66 42 00 00    	jne    0x4274
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	4d 8b 27             	mov    (%r15),%r12
  1b:	49 8d bc 24 80 00 00 	lea    0x80(%r12),%rdi
  22:	00
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	74 08                	je     0x3a
  32:	3c 03                	cmp    $0x3,%al
  34:	0f 8e 47 42 00 00    	jle    0x4281
  3a:	45                   	rex.RB
  3b:	8b                   	.byte 0x8b
  3c:	ac                   	lods   %ds:(%rsi),%al
  3d:	24 80                	and    $0x80,%al