netlink: 164 bytes leftover after parsing attributes in process `syz.4.6356'.
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: 2482 Comm: syz.4.6356 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:_compound_head include/linux/page-flags.h:284 [inline]
RIP: 0010:io_check_coalesce_buffer+0x354/0xb60 io_uring/rsrc.c:746
Code: f7 e8 30 69 62 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 62 fd 48 8b 6d 00 48 89 ee 48
RSP: 0018:ffffc9000c99fa38 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 00000000000000a4 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88807afe0520
RBP: 0000000000000008 R08: ffffea0001190007 R09: 1ffffd4000232000
R10: dffffc0000000000 R11: fffff94000232001 R12: ffff88807afe0520
R13: 00000000000000a5 R14: 0000000000000000 R15: ffffea0001190000
FS:  00007f1a4e9f16c0(0000) GS:ffff8881257ba000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007f420000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 io_region_init_ptr+0xdb/0x350 io_uring/memmap.c:119
 io_create_region+0x3a4/0x480 io_uring/memmap.c:228
 io_allocate_scq_urings+0x2b0/0x870 io_uring/io_uring.c:3626
 io_uring_create+0x591/0xba0 io_uring/io_uring.c:3867
 io_uring_setup io_uring/io_uring.c:3963 [inline]
 __do_sys_io_uring_setup io_uring/io_uring.c:3997 [inline]
 __se_sys_io_uring_setup+0x264/0x270 io_uring/io_uring.c:3988
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1a4db8ebe9
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:00007f1a4e9f0fc8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 00007f1a4ddc5fa0 RCX: 00007f1a4db8ebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000005b14
RBP: 0000200000000040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000005b14 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:_compound_head include/linux/page-flags.h:284 [inline]
RIP: 0010:io_check_coalesce_buffer+0x354/0xb60 io_uring/rsrc.c:746
Code: f7 e8 30 69 62 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 62 fd 48 8b 6d 00 48 89 ee 48
RSP: 0018:ffffc9000c99fa38 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 00000000000000a4 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88807afe0520
RBP: 0000000000000008 R08: ffffea0001190007 R09: 1ffffd4000232000
R10: dffffc0000000000 R11: fffff94000232001 R12: ffff88807afe0520
R13: 00000000000000a5 R14: 0000000000000000 R15: ffffea0001190000
FS:  00007f1a4e9f16c0(0000) GS:ffff8881258ba000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34f22ff8 CR3: 000000007f420000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	f7 e8                	imul   %eax
   2:	30 69 62             	xor    %ch,0x62(%rcx)
   5:	fd                   	std
   6:	4c 89 74 24 28       	mov    %r14,0x28(%rsp)
   b:	48 8b 44 24 18       	mov    0x18(%rsp),%rax
  10:	4c 8b 74 d8 08       	mov    0x8(%rax,%rbx,8),%r14
  15:	49 8d 6e 08          	lea    0x8(%r14),%rbp
  19:	48 89 e8             	mov    %rbp,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 ef             	mov    %rbp,%rdi
  33:	e8 fe 68 62 fd       	call   0xfd626936
  38:	48 8b 6d 00          	mov    0x0(%rbp),%rbp
  3c:	48 89 ee             	mov    %rbp,%rsi
  3f:	48                   	rex.W