================================================================== BUG: KASAN: null-ptr-deref in memcpy include/linux/string.h:447 [inline] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x540 net/nfc/llcp_sock.c:519 Read of size 43 at addr 0000000000000000 by task syz-executor.2/22056 CPU: 1 PID: 22056 Comm: syz-executor.2 Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 __kasan_report mm/kasan/report.c:400 [inline] kasan_report.cold+0x5f/0xd5 mm/kasan/report.c:413 check_memory_region_inline mm/kasan/generic.c:179 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:185 memcpy+0x20/0x60 mm/kasan/shadow.c:64 memcpy include/linux/string.h:447 [inline] llcp_sock_getname+0x358/0x540 net/nfc/llcp_sock.c:519 __sys_getpeername+0x10b/0x250 net/socket.c:1923 __do_sys_getpeername net/socket.c:1936 [inline] __se_sys_getpeername net/socket.c:1933 [inline] __x64_sys_getpeername+0x6f/0xb0 net/socket.c:1933 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa5e34adc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 00000000200000c0 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 000000000119c110 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007fff3821281f R14: 00007fa5e34ae9c0 R15: 000000000119c0dc ==================================================================