Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 UID: 0 PID: 5951 Comm: syz.1.12 Not tainted 6.12.0-rc5-next-20241101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:headpage_already_acct io_uring/rsrc.c:584 [inline]
RIP: 0010:io_buffer_account_pin io_uring/rsrc.c:614 [inline]
RIP: 0010:io_sqe_buffer_register+0xaa8/0x2cf0 io_uring/rsrc.c:758
Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 d0 70 55 fd 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 aa 70 55 fd 48 8b 03 48 89 44 24 60
RSP: 0018:ffffc90004957640 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: dffffc0000000000
RDX: ffff88807cc4c128 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900049577f0 R08: ffffffff84aa9107 R09: 1ffffd40003ce000
R10: dffffc0000000000 R11: fffff940003ce001 R12: ffffea0001e70000
R13: 0000000000000006 R14: 1ffff11005f210d0 R15: ffff88802f908680
FS:  00007fa111f6b6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000011b48000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __io_sqe_buffers_update io_uring/rsrc.c:257 [inline]
 __io_register_rsrc_update+0x5c8/0x1320 io_uring/rsrc.c:295
 io_register_rsrc_update+0x1d1/0x230 io_uring/rsrc.c:326
 __do_sys_io_uring_register io_uring/register.c:938 [inline]
 __se_sys_io_uring_register+0x8ee/0x40d0 io_uring/register.c:915
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa11117e719
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:00007fa111f6b038 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007fa111336130 RCX: 00007fa11117e719
RDX: 0000000020000600 RSI: 0000000000000010 RDI: 000000000000000b
RBP: 00007fa1111f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa111336130 R15: 00007fff69856fe8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:headpage_already_acct io_uring/rsrc.c:584 [inline]
RIP: 0010:io_buffer_account_pin io_uring/rsrc.c:614 [inline]
RIP: 0010:io_sqe_buffer_register+0xaa8/0x2cf0 io_uring/rsrc.c:758
Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 d0 70 55 fd 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 aa 70 55 fd 48 8b 03 48 89 44 24 60
RSP: 0018:ffffc90004957640 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: dffffc0000000000
RDX: ffff88807cc4c128 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900049577f0 R08: ffffffff84aa9107 R09: 1ffffd40003ce000
R10: dffffc0000000000 R11: fffff940003ce001 R12: ffffea0001e70000
R13: 0000000000000006 R14: 1ffff11005f210d0 R15: ffff88802f908680
FS:  00007fa111f6b6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc753709178 CR3: 0000000011b48000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	df 80 3c 08 00 74    	filds  0x7400083c(%rax)
   6:	08 48 89             	or     %cl,-0x77(%rax)
   9:	df e8                	fucomip %st(0),%st
   b:	d0 70 55             	shlb   0x55(%rax)
   e:	fd                   	std
   f:	48 8b 1b             	mov    (%rbx),%rbx
  12:	48 83 c3 18          	add    $0x18,%rbx
  16:	48 89 d8             	mov    %rbx,%rax
  19:	48 c1 e8 03          	shr    $0x3,%rax
  1d:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  24:	fc ff df
* 27:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2b:	74 08                	je     0x35
  2d:	48 89 df             	mov    %rbx,%rdi
  30:	e8 aa 70 55 fd       	call   0xfd5570df
  35:	48 8b 03             	mov    (%rbx),%rax
  38:	48 89 44 24 60       	mov    %rax,0x60(%rsp)