Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 7862 Comm: syz.1.769 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:io_check_coalesce_buffer+0x354/0xb60
Code: f7 e8 30 69 63 fd 4c 89 74 24 28 48 8b 44 24 18 4c 8b 74 d8 08 49 8d 6e 08 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 fe 68 63 fd 48 8b 6d 00 48 89 ee 48
RSP: 0018:ffffc900068af8d8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 00000000000001ff RCX: dffffc0000000000
RDX: ffffc90021469000 RSI: 000000000002b17f RDI: 000000000002b180
RBP: 0000000000000008 R08: ffffea0004400007 R09: 1ffffd4000880000
R10: dffffc0000000000 R11: fffff94000880001 R12: ffff888038c60ff8
R13: 0000000000000200 R14: 0000000000000000 R15: ffffea0004400000
FS:  00007f9f3c1256c0(0000) GS:ffff8880b83fa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c37dfff CR3: 000000010fde6000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 io_sqe_buffer_register+0x1ef/0x20a0
 __io_register_rsrc_update+0x55e/0x11b0
 io_register_rsrc_update+0x196/0x1a0
 __se_sys_io_uring_register+0x795/0x11b0
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9f3b38ebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9f3c125038 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007f9f3b5c5fa0 RCX: 00007f9f3b38ebe9
RDX: 0000200000000600 RSI: 0000000000000010 RDI: 0000000000000003
RBP: 00007f9f3b411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9f3b5c6038 R14: 00007f9f3b5c5fa0 R15: 00007ffe1278f588
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:io_check_coalesce_buffer+0x354/0xb60
Code: f7 e8 30 69 63 fd 4c 89 74 24 28 48 8b 44 24 18 4c 8b 74 d8 08 49 8d 6e 08 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 fe 68 63 fd 48 8b 6d 00 48 89 ee 48
RSP: 0018:ffffc900068af8d8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 00000000000001ff RCX: dffffc0000000000
RDX: ffffc90021469000 RSI: 000000000002b17f RDI: 000000000002b180
RBP: 0000000000000008 R08: ffffea0004400007 R09: 1ffffd4000880000
R10: dffffc0000000000 R11: fffff94000880001 R12: ffff888038c60ff8
R13: 0000000000000200 R14: 0000000000000000 R15: ffffea0004400000
FS:  00007f9f3c1256c0(0000) GS:ffff8880b83fa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb1b6f7d60 CR3: 000000010fde6000 CR4: 00000000000006f0
