[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.416813] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. [ 21.108438] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 21.340079] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.310882] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) [ 22.470534] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) Warning: Permanently added '10.128.10.7' (ECDSA) to the list of known hosts. [ 27.843014] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available) 2018/03/13 13:28:47 parsed 1 programs 2018/03/13 13:28:47 executed programs: 0 [ 28.184578] IPVS: Creating netns size=2552 id=1 [ 29.260957] kasan: CONFIG_KASAN_INLINE enabled [ 29.265414] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 29.278242] Dumping ftrace buffer: [ 29.281753] (ftrace buffer empty) [ 29.285492] Modules linked in: [ 29.289509] CPU: 1 PID: 4050 Comm: syz-executor0 Not tainted 4.4.120-gd63fdf6 #29 [ 29.297099] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.306422] task: ffff8800ba7c0000 task.stack: ffff8800ba040000 [ 29.312447] RIP: 0010:[] [] udp_queue_rcv_skb+0x191/0x1560 [ 29.321370] RSP: 0018:ffff8800ba0478b0 EFLAGS: 00010206 [ 29.326787] RAX: dffffc0000000000 RBX: ffff8800b42e0000 RCX: ffffffff831aa228 [ 29.334044] RDX: 000000000000000c RSI: ffff8801ce3cf640 RDI: 0000000000000060 [ 29.341282] RBP: ffff8800ba0478f0 R08: 0000000000000001 R09: 0000000000000001 [ 29.348520] R10: 0000000000000000 R11: 1ffff10017408ee8 R12: ffff8801ce3cf640 [ 29.355771] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801ce3cf698 [ 29.363012] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000085bc900 [ 29.371209] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 29.377061] CR2: 000000002082dff0 CR3: 00000000afc56000 CR4: 0000000000160670 [ 29.384308] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.391545] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.398790] Stack: [ 29.400908] ffff8800b42e0088 ffff880000000001 ffff8800b42e0088 dffffc0000000000 [ 29.408867] ffff8800b42e0000 0000000000000000 ffffed001685c086 ffff8801ce3cf640 [ 29.416833] ffff8800ba047960 ffffffff82df8cb6 ffff8800b42e0188 ffff8800b42e0190 [ 29.424793] Call Trace: [ 29.427349] [] release_sock+0x176/0x510 [ 29.432949] [] udp_sendmsg+0x15c4/0x1c30 [ 29.438630] [] ? avc_has_perm_noaudit+0x460/0x460 [ 29.445093] [] ? udp_push_pending_frames+0xe0/0xe0 [ 29.451639] [] ? udp_seq_next+0x80/0x80 [ 29.457232] [] ? sock_has_perm+0x1c1/0x400 [ 29.463085] [] ? sock_has_perm+0x29f/0x400 [ 29.468987] [] ? sock_has_perm+0x9f/0x400 [ 29.474753] [] ? inet_sendmsg+0x201/0x4c0 [ 29.480518] [] inet_sendmsg+0x2bc/0x4c0 [ 29.486107] [] ? inet_sendmsg+0x73/0x4c0 [ 29.491790] [] ? inet_recvmsg+0x4c0/0x4c0 [ 29.497562] [] sock_sendmsg+0xca/0x110 [ 29.503065] [] SYSC_sendto+0x2c8/0x340 [ 29.508570] [] ? SYSC_connect+0x310/0x310 [ 29.514345] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 29.521329] [] ? _raw_spin_unlock+0x2c/0x50 [ 29.527271] [] ? compat_SyS_futex+0x1f9/0x2a0 [ 29.533385] [] ? compat_SyS_get_robust_list+0x300/0x300 [ 29.540371] [] SyS_sendto+0x40/0x50 [ 29.545616] [] ? SyS_getpeername+0x30/0x30 [ 29.551468] [] do_fast_syscall_32+0x321/0x8a0 [ 29.557584] [] sysenter_flags_fixed+0xd/0x17 [ 29.563607] Code: 74 24 58 41 f6 c6 01 0f 85 7f 07 00 00 e8 28 6b 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 [ 29.590149] RIP [] udp_queue_rcv_skb+0x191/0x1560 [ 29.596726] RSP [ 29.600363] ---[ end trace 2d6a1663a3a29cd9 ]--- [ 29.605098] Kernel panic - not syncing: Fatal exception in interrupt [ 29.612054] Dumping ftrace buffer: [ 29.615563] (ftrace buffer empty) [ 29.619242] Kernel Offset: disabled [ 29.622836] Rebooting in 86400 seconds..