================================================================== BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x254/0x480 net/nfc/llcp_sock.c:523 Read of size 34 at addr 0000000000000000 by task syz-executor.4/19263 CPU: 0 PID: 19263 Comm: syz-executor.4 Not tainted 5.13.0-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+0x202/0x31e lib/dump_stack.c:120 __kasan_report mm/kasan/report.c:423 [inline] kasan_report+0x152/0x200 mm/kasan/report.c:436 check_region_inline mm/kasan/generic.c:135 [inline] kasan_check_range+0x2b5/0x2f0 mm/kasan/generic.c:186 memcpy+0x25/0x60 mm/kasan/shadow.c:65 llcp_sock_getname+0x254/0x480 net/nfc/llcp_sock.c:523 __sys_getpeername+0x1c7/0x2c0 net/socket.c:1925 __do_sys_getpeername net/socket.c:1938 [inline] __se_sys_getpeername net/socket.c:1935 [inline] __x64_sys_getpeername+0x77/0x90 net/socket.c:1935 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 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:00007f04e428a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000020000080 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffea546516f R14: 00007f04e428a300 R15: 0000000000022000 ==================================================================