================================================================== BUG: KASAN: null-ptr-deref in memcpy include/linux/string.h:373 [inline] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x540 net/nfc/llcp_sock.c:531 Read of size 43 at addr 0000000000000000 by task syz-executor.0/26331 CPU: 1 PID: 26331 Comm: syz-executor.0 Not tainted 4.19.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 kasan_report_error.cold+0x15b/0x1b9 mm/kasan/report.c:352 kasan_report+0x8f/0xa0 mm/kasan/report.c:412 memcpy+0x20/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:373 [inline] llcp_sock_getname+0x358/0x540 net/nfc/llcp_sock.c:531 __sys_getpeername+0x10b/0x250 net/socket.c:1735 __do_sys_getpeername net/socket.c:1748 [inline] __se_sys_getpeername net/socket.c:1745 [inline] __x64_sys_getpeername+0x6f/0xb0 net/socket.c:1745 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 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:00007f5172997188 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000020000080 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc91eb86ff R14: 00007f5172997300 R15: 0000000000022000 ==================================================================