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: 10206 Comm: syz-executor.2 Not tainted 5.14.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_accept fs/io_uring.c:4846 [inline]
RIP: 0010:io_issue_sqe+0x24d6/0x5cc0 fs/io_uring.c:6329
Code: 48 c1 e9 03 80 3c 01 00 0f 85 46 28 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 0c 24 49 8d b9 80 00 00 00 48 89 f9 48 c1 e9 03 <0f> b6 04 01 84 c0 74 08 3c 03 0f 8e 2f 28 00 00 41 f6 81 81 00 00
RSP: 0018:ffffc9000a6bfb70 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 1ffff920014d7f82 RCX: 0000000000000010
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000080
RBP: ffff888034e1c7d8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888034e1c780
R13: ffff888034e1c7c8 R14: ffff888034e1c79c R15: 0000000000000800
FS:  00007f85cd6b9700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000522230 CR3: 00000000458eb000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __io_queue_sqe+0x85/0x960 fs/io_uring.c:6586
 tctx_task_work+0x171/0x4b0 fs/io_uring.c:2090
 task_work_run+0xc0/0x160 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:00007f85cd6b9188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000304 RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000304 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff28aa8d5f R14: 00007f85cd6b9300 R15: 0000000000022000
Modules linked in:
---[ end trace 8fd38d0c2989449c ]---
RIP: 0010:io_accept fs/io_uring.c:4846 [inline]
RIP: 0010:io_issue_sqe+0x24d6/0x5cc0 fs/io_uring.c:6329
Code: 48 c1 e9 03 80 3c 01 00 0f 85 46 28 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 0c 24 49 8d b9 80 00 00 00 48 89 f9 48 c1 e9 03 <0f> b6 04 01 84 c0 74 08 3c 03 0f 8e 2f 28 00 00 41 f6 81 81 00 00
RSP: 0018:ffffc9000a6bfb70 EFLAGS: 00010202

RAX: dffffc0000000000 RBX: 1ffff920014d7f82 RCX: 0000000000000010
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000080
RBP: ffff888034e1c7d8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888034e1c780
R13: ffff888034e1c7c8 R14: ffff888034e1c79c R15: 0000000000000800
FS:  00007f85cd6b9700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1c55d3000 CR3: 00000000458eb000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 c1 e9 03          	shr    $0x3,%rcx
   4:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
   8:	0f 85 46 28 00 00    	jne    0x2854
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	4d 8b 0c 24          	mov    (%r12),%r9
  1c:	49 8d b9 80 00 00 00 	lea    0x80(%r9),%rdi
  23:	48 89 f9             	mov    %rdi,%rcx
  26:	48 c1 e9 03          	shr    $0x3,%rcx
* 2a:	0f b6 04 01          	movzbl (%rcx,%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 2f 28 00 00    	jle    0x2869
  3a:	41                   	rex.B
  3b:	f6                   	.byte 0xf6
  3c:	81                   	.byte 0x81
  3d:	81                   	.byte 0x81