audit: type=1804 audit(1594161628.234:1026): pid=21110 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="ToMToU" comm="syz-executor.3" name="/root/syzkaller-testdir887695913/syzkaller.kdexx0/350/bus" dev="sda1" ino=15990 res=1
==================================================================
BUG: KASAN: null-ptr-deref in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x37b/0x490 net/nfc/llcp_sock.c:532
Read of size 44 at addr           (null) by task syz-executor.5/21139

CPU: 1 PID: 21139 Comm: syz-executor.5 Not tainted 4.14.184-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+0x1b2/0x283 lib/dump_stack.c:58
 kasan_report_error mm/kasan/report.c:349 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0x127/0x2b9 mm/kasan/report.c:393
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:347 [inline]
 llcp_sock_getname+0x37b/0x490 net/nfc/llcp_sock.c:532
 SYSC_getsockname net/socket.c:1683 [inline]
 SyS_getsockname+0x100/0x1c0 net/socket.c:1668
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cba9
RSP: 002b:00007efcd0047c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000033
RAX: ffffffffffffffda RBX: 00000000004dddc0 RCX: 000000000045cba9
RDX: 0000000020000300 RSI: 0000000020000280 RDI: 0000000000000005
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000118 R14: 00000000004c3d29 R15: 00007efcd00486d4
==================================================================
audit: type=1804 audit(1594161628.274:1027): pid=21108 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir018985842/syzkaller.0HXhGW/262/bus" dev="sda1" ino=15993 res=1
audit: type=1804 audit(1594161628.274:1028): pid=21108 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="ToMToU" comm="syz-executor.0" name="/root/syzkaller-testdir018985842/syzkaller.0HXhGW/262/bus" dev="sda1" ino=15993 res=1