BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD a86f8067 P4D a86f8067 PUD 966ec067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8840 Comm: syz-executor042 Not tainted 5.4.0-rc6-next-20191105 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:56
Code: 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 <f3> a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe
RSP: 0018:ffff8880978ffba0 EFLAGS: 00010246
RAX: ffff8880978ffd2a RBX: ffff8880978ffd18 RCX: 000000000000003f
RDX: 000000000000003f RSI: 0000000000000000 RDI: ffff8880978ffd2a
RBP: ffff8880978ffbc0 R08: 1ffff11012f1ffa5 R09: ffffed1012f1ffae
R10: ffffed1012f1ffad R11: ffff8880978ffd68 R12: 000000000000003f
R13: ffff8880978ffd2a R14: 0000000000000000 R15: ffff88809157aa00
FS:  0000000002582880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000094ded000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 memcpy include/linux/string.h:423 [inline]
 llcp_sock_getname+0x358/0x460 net/nfc/llcp_sock.c:519
 sock_getsockopt+0x14a7/0x205e net/core/sock.c:1392
 __sys_getsockopt+0x2c9/0x310 net/socket.c:2143
 __do_sys_getsockopt net/socket.c:2162 [inline]
 __se_sys_getsockopt net/socket.c:2159 [inline]
 __x64_sys_getsockopt+0xbe/0x150 net/socket.c:2159
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4412c9
Code: e8 ac e8 ff ff 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd2dc31a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9
RDX: 000000000000001c RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00000000006cb018 R08: 0000000020000140 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402040
R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: 0000000000000000
---[ end trace fc57b71123e45e6c ]---
RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:56
Code: 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 <f3> a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe
RSP: 0018:ffff8880978ffba0 EFLAGS: 00010246
RAX: ffff8880978ffd2a RBX: ffff8880978ffd18 RCX: 000000000000003f
RDX: 000000000000003f RSI: 0000000000000000 RDI: ffff8880978ffd2a
RBP: ffff8880978ffbc0 R08: 1ffff11012f1ffa5 R09: ffffed1012f1ffae
R10: ffffed1012f1ffad R11: ffff8880978ffd68 R12: 000000000000003f
R13: ffff8880978ffd2a R14: 0000000000000000 R15: ffff88809157aa00
FS:  0000000002582880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc0e0dc000 CR3: 0000000094ded000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400