==================================================================
llcp: llcp_sock_recvmsg: Recv datagram failed state 5 -512 0
BUG: KASAN: null-ptr-deref in memcpy include/linux/string.h:372 [inline]
BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x38c/0x580 net/nfc/llcp_sock.c:532
Read of size 63 at addr           (null) by task syz-executor.3/26124

CPU: 1 PID: 26124 Comm: syz-executor.3 Not tainted 4.14.217-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 kasan_report_error.cold+0x144/0x191 mm/kasan/report.c:349
 kasan_report+0x6f/0x80 mm/kasan/report.c:409
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:372 [inline]
 llcp_sock_getname+0x38c/0x580 net/nfc/llcp_sock.c:532
 SYSC_getsockname net/socket.c:1683 [inline]
 SyS_getsockname+0xff/0x1c0 net/socket.c:1668
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45e219
RSP: 002b:00007f0cdf266c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000033
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219
RDX: 0000000020000080 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000119c110 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc
R13: 00007ffdc8decbaf R14: 00007f0cdf2679c0 R15: 000000000119c0dc
==================================================================
audit: type=1326 audit(1611767178.480:92): auid=0 uid=0 gid=0 ses=4 pid=26135 comm="syz-executor.0" exe="/root/syz-executor.0" sig=9 arch=c000003e syscall=228 compat=0 ip=0x46107a code=0x0