general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 PID: 22547 Comm: syz-executor.5 Not tainted 5.18.0-rc1-syzkaller-00016-g3e732ebf7316 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x6a/0x1f80 kernel/locking/lockdep.c:4899
Code: ff df 8a 04 10 84 c0 0f 85 60 16 00 00 83 3d 20 68 79 0c 00 0f 84 10 15 00 00 83 3d ff 99 17 0b 00 74 2c 4c 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ef e8 68 ca 6f 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90015a97908 EFLAGS: 00010006
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000018
RBP: ffff88802451ba00 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff1bc062e R11: 1ffffffff1bc062d R12: 0000000000000000
R13: 0000000000000018 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f08f63e9700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc164d691b8 CR3: 000000001b6a2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5641
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
 prepare_to_wait+0x3f/0x310 kernel/sched/wait.c:265
 nr_accept+0x53b/0x660 net/netrom/af_netrom.c:793
 do_accept+0x4d0/0x6d0 net/socket.c:1777
 __sys_accept4_file net/socket.c:1820 [inline]
 __sys_accept4+0x104/0x170 net/socket.c:1850
 __do_sys_accept4 net/socket.c:1862 [inline]
 __se_sys_accept4 net/socket.c:1859 [inline]
 __x64_sys_accept4+0x96/0xb0 net/socket.c:1859
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f08f5289049
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f08f63e9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000120
RAX: ffffffffffffffda RBX: 00007f08f539c1d0 RCX: 00007f08f5289049
RDX: 0000000020000240 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00007f08f52e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff25e3187f R14: 00007f08f63e9300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x6a/0x1f80 kernel/locking/lockdep.c:4899
Code: ff df 8a 04 10 84 c0 0f 85 60 16 00 00 83 3d 20 68 79 0c 00 0f 84 10 15 00 00 83 3d ff 99 17 0b 00 74 2c 4c 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ef e8 68 ca 6f 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90015a97908 EFLAGS: 00010006
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000018
RBP: ffff88802451ba00 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff1bc062e R11: 1ffffffff1bc062d R12: 0000000000000000
R13: 0000000000000018 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f08f63e9700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc164d691b8 CR3: 000000001b6a2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	df 8a 04 10 84 c0    	fisttps -0x3f7beffc(%rdx)
   6:	0f 85 60 16 00 00    	jne    0x166c
   c:	83 3d 20 68 79 0c 00 	cmpl   $0x0,0xc796820(%rip)        # 0xc796833
  13:	0f 84 10 15 00 00    	je     0x1529
  19:	83 3d ff 99 17 0b 00 	cmpl   $0x0,0xb1799ff(%rip)        # 0xb179a1f
  20:	74 2c                	je     0x4e
  22:	4c 89 e8             	mov    %r13,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1) <-- trapping instruction
  2d:	74 12                	je     0x41
  2f:	4c 89 ef             	mov    %r13,%rdi
  32:	e8 68 ca 6f 00       	callq  0x6fca9f
  37:	48                   	rex.W
  38:	ba 00 00 00 00       	mov    $0x0,%edx
  3d:	00 fc                	add    %bh,%ah