[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.675303] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.346508] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 20.698564] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 21.660599] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. executing program [ 36.948547] kasan: CONFIG_KASAN_INLINE enabled [ 36.952992] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.965800] Dumping ftrace buffer: [ 36.969304] (ftrace buffer empty) [ 36.972981] Modules linked in: [ 36.976255] CPU: 0 PID: 3761 Comm: syzkaller323756 Not tainted 4.4.125-g38f41ec #63 [ 36.984014] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.993339] task: ffff8801c8c74800 task.stack: ffff8800ac488000 [ 36.999362] RIP: 0010:[] [] udp_queue_rcv_skb+0x191/0x1560 [ 37.008285] RSP: 0018:ffff8800ac48f928 EFLAGS: 00010206 [ 37.013698] RAX: dffffc0000000000 RBX: ffff8801d7170000 RCX: ffffffff831b0248 [ 37.020936] RDX: 000000000000000c RSI: ffff8801cc626000 RDI: 0000000000000060 [ 37.028172] RBP: ffff8800ac48f968 R08: 0000000000000001 R09: 0000000000000001 [ 37.035411] R10: 0000000000000000 R11: 1ffff10015891ef6 R12: ffff8801cc626000 [ 37.042646] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801cc626058 [ 37.049886] FS: 0000000001f77880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 37.058077] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.063925] CR2: 0000000020b9aff0 CR3: 00000000b215c000 CR4: 0000000000160670 [ 37.071161] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.078396] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.085634] Stack: [ 37.087751] ffff8801d7170088 ffff880100000001 ffff8801d7170088 dffffc0000000000 [ 37.095714] ffff8801d7170000 0000000000000000 ffffed003ae2e086 ffff8801cc626000 [ 37.103668] ffff8800ac48f9d8 ffffffff82dfe8d6 ffff8801d7170188 ffff8801d7170190 [ 37.111626] Call Trace: [ 37.114183] [] release_sock+0x176/0x510 [ 37.119781] [] udp_sendmsg+0x15c4/0x1c30 [ 37.125460] [] ? udp_push_pending_frames+0xe0/0xe0 [ 37.132004] [] ? udp_seq_next+0x80/0x80 [ 37.137593] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 37.144571] [] ? sock_has_perm+0x1c1/0x400 [ 37.150425] [] ? sock_has_perm+0x29f/0x400 [ 37.156276] [] ? sock_has_perm+0x9f/0x400 [ 37.162040] [] ? inet_sendmsg+0x201/0x4c0 [ 37.167806] [] inet_sendmsg+0x2bc/0x4c0 [ 37.173398] [] ? inet_sendmsg+0x73/0x4c0 [ 37.179074] [] ? inet_recvmsg+0x4c0/0x4c0 [ 37.184839] [] sock_sendmsg+0xca/0x110 [ 37.190339] [] SYSC_sendto+0x2c8/0x340 [ 37.195844] [] ? SYSC_connect+0x310/0x310 [ 37.201606] [] ? udp_v4_get_port+0x139/0x180 [ 37.207639] [] ? inet_bind+0xb0/0x880 [ 37.213057] [] ? SYSC_bind+0x1ad/0x280 [ 37.218572] [] ? __do_page_fault+0x380/0xa00 [ 37.224598] [] ? retint_user+0x18/0x3c [ 37.230101] [] SyS_sendto+0x40/0x50 [ 37.235344] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 37.241886] Code: 74 24 58 41 f6 c6 01 0f 85 7f 07 00 00 e8 38 14 1b fe 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e 9f 0b 00 00 41 f6 46 60 04 [ 37.268333] RIP [] udp_queue_rcv_skb+0x191/0x1560 [ 37.274910] RSP [ 37.278550] ---[ end trace e20f96a80a58a3c8 ]--- [ 37.283286] Kernel panic - not syncing: Fatal exception in interrupt [ 37.290118] Dumping ftrace buffer: [ 37.293628] (ftrace buffer empty) [ 37.297306] Kernel Offset: disabled [ 37.300900] Rebooting in 86400 seconds..