[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.451153] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.561401] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 22.812566] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 24.193955] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. executing program [ 29.998310] kasan: CONFIG_KASAN_INLINE enabled [ 30.002730] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.015590] Dumping ftrace buffer: [ 30.019109] (ftrace buffer empty) [ 30.022791] Modules linked in: [ 30.026074] CPU: 0 PID: 3715 Comm: syz-executor519 Not tainted 4.4.141-g9664bde #75 [ 30.033846] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.043176] task: ffff8800b26a0000 task.stack: ffff8800b17c0000 [ 30.049208] RIP: 0010:[] [] udp_queue_rcv_skb+0x18f/0x1570 [ 30.058149] RSP: 0018:ffff8800b17c7930 EFLAGS: 00010206 [ 30.063568] RAX: dffffc0000000000 RBX: ffff8800b1710000 RCX: 1ffff1003b00254b [ 30.070812] RDX: 000000000000000c RSI: ffffffff832d3446 RDI: 0000000000000060 [ 30.078057] RBP: ffff8800b17c7970 R08: ffffffff853008f0 R09: 0000000000000001 [ 30.085312] R10: 0000000000000000 R11: ffff8800b26a0000 R12: ffff8801d8012a00 [ 30.092553] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801d8012a58 [ 30.099805] FS: 00000000016a1880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 30.108003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.113870] CR2: 00000000203c7ff4 CR3: 00000000b24e7000 CR4: 00000000001606f0 [ 30.121115] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.128358] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.135599] Stack: [ 30.137720] ffff8800b1710088 ffff880100000001 ffff8800b1710088 ffff8800b1710000 [ 30.145708] ffff8801d8012a00 dffffc0000000000 ffff8801d8012a58 0000000000000000 [ 30.153705] ffff8800b17c79e0 ffffffff82f2b7db ffff8800b1710430 ffff8800b1710188 [ 30.161695] Call Trace: [ 30.164282] [] release_sock+0x17b/0x500 [ 30.169880] [] udp_sendmsg+0x1152/0x1c70 [ 30.175564] [] ? udp_push_pending_frames+0xe0/0xe0 [ 30.182125] [] ? udp4_lib_lookup+0x60/0x60 [ 30.187983] [] ? debug_check_no_locks_freed+0x210/0x210 [ 30.194968] [] ? sock_has_perm+0x1c1/0x400 [ 30.200826] [] ? sock_has_perm+0x29f/0x400 [ 30.206683] [] ? sock_has_perm+0x9f/0x400 [ 30.212466] [] ? inet_sendmsg+0x143/0x4d0 [ 30.218249] [] inet_sendmsg+0x203/0x4d0 [ 30.223842] [] ? inet_sendmsg+0x73/0x4d0 [ 30.229527] [] ? inet_recvmsg+0x4c0/0x4c0 [ 30.235304] [] sock_sendmsg+0xcc/0x110 [ 30.240821] [] SYSC_sendto+0x21c/0x370 [ 30.246328] [] ? SYSC_connect+0x300/0x300 [ 30.252099] [] ? mntput_no_expire+0xca/0x680 [ 30.258141] [] ? sock_release+0x1c0/0x1c0 [ 30.263911] [] ? mntput_no_expire+0xf6/0x680 [ 30.269943] [] ? task_work_run+0x152/0x190 [ 30.275803] [] ? int_ret_from_sys_call+0x52/0xa3 [ 30.282181] [] SyS_sendto+0x40/0x50 [ 30.287429] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 30.293975] Code: 74 24 58 41 f6 c6 01 0f 85 a6 07 00 00 e8 da e0 07 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 25 0e 00 00 41 f6 46 60 04 [ 30.320828] RIP [] udp_queue_rcv_skb+0x18f/0x1570 [ 30.327425] RSP [ 30.331065] ---[ end trace c4cf539f60762d70 ]--- [ 30.335844] Kernel panic - not syncing: Fatal exception in interrupt [ 30.342809] Dumping ftrace buffer: [ 30.346323] (ftrace buffer empty) [ 30.350005] Kernel Offset: disabled [ 30.353604] Rebooting in 86400 seconds..