general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 1107 Comm: syz-executor.5 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
RIP: 0010:do_raw_spin_lock+0x69/0x2b0 kernel/locking/spinlock_debug.c:112
Code: 5b 81 48 8d 14 03 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 48 89 fa 65 48 8b 0c 25 28 00 00 00 48 89 4c 24 60 31 c9 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 db
RSP: 0018:ffffc900021cfba0 EFLAGS: 00010047
RAX: dffffc0000000000 RBX: 1ffff92000439f75 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8d6aec17
R10: fffffbfff1ad5d82 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000000 R14: ffff88802d9cb880 R15: ffffc900021cfcf8
FS:  00007f77a9722700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000400308 CR3: 0000000010a1f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline]
 _raw_spin_lock_irqsave+0x41/0x50 kernel/locking/spinlock.c:159
 prepare_to_wait+0x43/0x370 kernel/sched/wait.c:259
 nr_accept+0x201/0x640 net/netrom/af_netrom.c:793
 __sys_accept4_file+0x3b2/0x5b0 net/socket.c:1778
 __sys_accept4+0xb0/0x100 net/socket.c:1829
 __do_sys_accept4 net/socket.c:1841 [inline]
 __se_sys_accept4 net/socket.c:1838 [inline]
 __x64_sys_accept4+0x93/0xf0 net/socket.c:1838
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f77a9722188 EFLAGS: 00000246 ORIG_RAX: 0000000000000120
RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665d9
RDX: 0000000020000340 RSI: 0000000020000300 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0
R13: 00007ffd1ade747f R14: 00007f77a9722300 R15: 0000000000022000
Modules linked in:
---[ end trace 25bc3f4d68ba8f33 ]---
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
RIP: 0010:do_raw_spin_lock+0x69/0x2b0 kernel/locking/spinlock_debug.c:112
Code: 5b 81 48 8d 14 03 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 48 89 fa 65 48 8b 0c 25 28 00 00 00 48 89 4c 24 60 31 c9 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 db
RSP: 0018:ffffc900021cfba0 EFLAGS: 00010047
RAX: dffffc0000000000 RBX: 1ffff92000439f75 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8d6aec17
R10: fffffbfff1ad5d82 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000000 R14: ffff88802d9cb880 R15: ffffc900021cfcf8
FS:  00007f77a9722700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000400308 CR3: 0000000010a1f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400