Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 0 UID: 0 PID: 6593 Comm: syz.1.365 Not tainted 6.11.0-rc3-next-20240813-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__lock_acquire+0x69/0x2040 kernel/locking/lockdep.c:5010
Code: b6 04 30 84 c0 0f 85 87 16 00 00 45 31 f6 83 3d 28 c5 a8 0e 00 0f 84 ac 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 c9 2c 8c 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc900159cf4f0 EFLAGS: 00010002
RAX: 0000000000000004 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2030fbe R12: ffff888021310000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000020
FS:  00007f79ab7c46c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3111fffc CR3: 000000006cb8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5762
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
 _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236
 send_sigurg+0x5a/0x3d0 fs/fcntl.c:945
 sk_send_sigurg+0x6e/0x2f0 net/core/sock.c:3432
 queue_oob+0x572/0x730 net/unix/af_unix.c:2240
 unix_stream_sendmsg+0xd24/0xf80 net/unix/af_unix.c:2358
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
 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: 0033:0x7f79aa9799f9
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:00007f79ab7c4038 EFLAGS: 00000246
 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f79aab15f80 RCX: 00007f79aa9799f9
RDX: 0000000000000001 RSI: 0000000020000700 RDI: 0000000000000004
RBP: 00007f79aa9e78ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f79aab15f80 R15: 00007ffe51654e88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x69/0x2040 kernel/locking/lockdep.c:5010
Code: b6 04 30 84 c0 0f 85 87 16 00 00 45 31 f6 83 3d 28 c5 a8 0e 00 0f 84 ac 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 c9 2c 8c 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc900159cf4f0 EFLAGS: 00010002
RAX: 0000000000000004 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2030fbe R12: ffff888021310000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000020
FS:  00007f79ab7c46c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3111fffc CR3: 000000006cb8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	b6 04                	mov    $0x4,%dh
   2:	30 84 c0 0f 85 87 16 	xor    %al,0x1687850f(%rax,%rax,8)
   9:	00 00                	add    %al,(%rax)
   b:	45 31 f6             	xor    %r14d,%r14d
   e:	83 3d 28 c5 a8 0e 00 	cmpl   $0x0,0xea8c528(%rip)        # 0xea8c53d
  15:	0f 84 ac 13 00 00    	je     0x13c7
  1b:	89 54 24 54          	mov    %edx,0x54(%rsp)
  1f:	89 5c 24 68          	mov    %ebx,0x68(%rsp)
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 30 00          	cmpb   $0x0,(%rax,%rsi,1) <-- trapping instruction
  2e:	74 12                	je     0x42
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 c9 2c 8c 00       	call   0x8c2d01
  38:	48                   	rex.W
  39:	be 00 00 00 00       	mov    $0x0,%esi
  3e:	00 fc                	add    %bh,%ah