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: 10160 Comm: syz-executor066 Not tainted 5.6.0-rc1-next-20200214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x1656/0x6320 kernel/locking/lockdep.c:4063
Code: 00 0f 85 11 30 00 00 48 81 c4 08 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 cc 32 00 00 49 81 3e 60 97 e0 8a 0f 84 5d ea ff
RSP: 0018:ffffc9000648fa00 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc9000648fb30 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff154bf68 R11: ffff888097838040 R12: 0000000000000018
R13: 0000000000000000 R14: 0000000000000018 R15: 0000000000000001
FS:  00007fd0983a2700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ae680 CR3: 0000000094342000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4720
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:159
 prepare_to_wait+0x7c/0x300 kernel/sched/wait.c:244
 nr_accept+0x245/0x770 net/netrom/af_netrom.c:771
 __sys_accept4_file+0x3be/0x5e0 net/socket.c:1758
 __sys_accept4+0x5a/0xa0 net/socket.c:1809
 __do_sys_accept net/socket.c:1827 [inline]
 __se_sys_accept net/socket.c:1824 [inline]
 __x64_sys_accept+0x75/0xb0 net/socket.c:1824
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x448eb9
Code: e8 ec 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 8b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd0983a1db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002b
RAX: ffffffffffffffda RBX: 00000000006dec58 RCX: 0000000000448eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006dec50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec5c
R13: 00007ffdf4bede8f R14: 00007fd0983a29c0 R15: 000000000000002d
Modules linked in:
---[ end trace 8fb9009f8615876c ]---
RIP: 0010:__lock_acquire+0x1656/0x6320 kernel/locking/lockdep.c:4063
Code: 00 0f 85 11 30 00 00 48 81 c4 08 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 cc 32 00 00 49 81 3e 60 97 e0 8a 0f 84 5d ea ff
RSP: 0018:ffffc9000648fa00 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc9000648fb30 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff154bf68 R11: ffff888097838040 R12: 0000000000000018
R13: 0000000000000000 R14: 0000000000000018 R15: 0000000000000001
FS:  00007fd0983a2700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ae680 CR3: 0000000094342000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400