random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) audit: type=1400 audit(1575836815.455:36): avc: denied { map } for pid=6895 comm="syz-executor973" path="/root/syz-executor973245589" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 ================================================================== BUG: KASAN: null-ptr-deref in memcpy include/linux/string.h:347 [inline] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x38f/0x4a0 net/nfc/llcp_sock.c:532 Read of size 43 at addr (null) by task syz-executor973/6895 CPU: 1 PID: 6895 Comm: syz-executor973 Not tainted 4.14.158-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+0x142/0x197 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+0x127/0x2af mm/kasan/report.c:393 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x123/0x190 mm/kasan/kasan.c:267 memcpy+0x24/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:347 [inline] llcp_sock_getname+0x38f/0x4a0 net/nfc/llcp_sock.c:532 SYSC_getpeername+0x120/0x270 net/socket.c:1715 SyS_getpeername+0x24/0x30 net/socket.c:1699 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x440349 RSP: 002b:00007ffdb6b13ad8 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 RAX: ffffffffffffffda RBX: fe7f62c7329d9aaa RCX: 0000000000440349 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 65e500001d7ef6cc R08: 00007ffdb6b13c48 R09: 00007ffdb6b13c48 R10: 00007ffdb6b13c48 R11: 0000000000000246 R12: 211e267fffffffff R13: ffff000000004d02 R14: aac8030fa4d62b9c R15: d303a55487e71188 ==================================================================