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: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 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:ffffc900001e6b70 EFLAGS: 00010002
RAX: 0000000000000004 RBX: 0000000000000002 RCX: 0000000000000002
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2030fbe R12: ffff888017ec8000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000020
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe946bf89c8 CR3: 000000001f5ce000 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
 tcp_check_urg+0x207/0x740 net/ipv4/tcp_input.c:5835
 tcp_urg+0x15c/0x450 net/ipv4/tcp_input.c:5876
 tcp_rcv_established+0xfaf/0x2020 net/ipv4/tcp_input.c:6231
 tcp_v4_do_rcv+0x96d/0xc70 net/ipv4/tcp_ipv4.c:1909
 tcp_v4_rcv+0x2dc0/0x37f0 net/ipv4/tcp_ipv4.c:2344
 ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5661 [inline]
 __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775
 process_backlog+0x662/0x15b0 net/core/dev.c:6108
 __napi_poll+0xcb/0x490 net/core/dev.c:6772
 napi_poll net/core/dev.c:6841 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:6963
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 run_ksoftirqd+0xca/0x130 kernel/softirq.c:928
 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </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:ffffc900001e6b70 EFLAGS: 00010002
RAX: 0000000000000004 RBX: 0000000000000002 RCX: 0000000000000002
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2030fbe R12: ffff888017ec8000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000020
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe946bf89c8 CR3: 000000001f5ce000 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