================================================================== BUG: KASAN: null-ptr-deref in memcpy include/linux/string.h:380 [inline] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 net/nfc/llcp_sock.c:519 Read of size 43 at addr 0000000000000000 by task syz-executor006/9407 CPU: 1 PID: 9407 Comm: syz-executor006 Not tainted 5.4.0-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+0x197/0x210 lib/dump_stack.c:118 __kasan_report.cold+0x5/0x41 mm/kasan/report.c:510 kasan_report+0x12/0x20 mm/kasan/common.c:638 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192 memcpy+0x24/0x50 mm/kasan/common.c:124 memcpy include/linux/string.h:380 [inline] llcp_sock_getname+0x358/0x460 net/nfc/llcp_sock.c:519 __sys_getpeername+0x12b/0x290 net/socket.c:1933 __do_sys_getpeername net/socket.c:1946 [inline] __se_sys_getpeername net/socket.c:1943 [inline] __x64_sys_getpeername+0x73/0xb0 net/socket.c:1943 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440349 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffc8833e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 RAX: ffffffffffffffda RBX: fe7f62c7329d9aaa RCX: 0000000000440349 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 65e500001d7ef6cc R08: 00007ffc8833e198 R09: 00007ffc8833e198 R10: 00007ffc8833e198 R11: 0000000000000246 R12: 211e267fffffffff R13: ffff000000004d02 R14: aac8030fa4d62b9c R15: d303a55487e71188 ==================================================================