[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.860005] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 21.341864] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 21.562720] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.506462] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) [ 36.524084] random: sshd: uninitialized urandom read (32 bytes read, 123 bits of entropy available) Warning: Permanently added '10.128.15.227' (ECDSA) to the list of known hosts. [ 41.909023] random: nonblocking pool is initialized executing program executing program [ 42.065317] kasan: CONFIG_KASAN_INLINE enabled [ 42.069771] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.082620] Dumping ftrace buffer: [ 42.086137] (ftrace buffer empty) [ 42.089828] Modules linked in: [ 42.093118] CPU: 1 PID: 3914 Comm: syzkaller597547 Not tainted 4.4.114-g4e74e98 #5 [ 42.100791] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.110202] task: ffff8801d95c9800 task.stack: ffff8800b1998000 [ 42.116227] RIP: 0010:[] [] udpv6_queue_rcv_skb+0x191/0x1510 [ 42.125338] RSP: 0018:ffff8800b199f5d8 EFLAGS: 00010206 [ 42.130768] RAX: dffffc0000000000 RBX: ffff8801cbfc8000 RCX: ffffffff83373348 [ 42.138007] RDX: 000000000000000c RSI: ffff8801cf3aab40 RDI: 0000000000000060 [ 42.145257] RBP: ffff8800b199f618 R08: 0000000000000001 R09: 0000000000000001 [ 42.152500] R10: 0000000000000000 R11: 1ffff10016333e8c R12: ffff8801cf3aab40 [ 42.159740] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801cf3aab98 [ 42.166979] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000008b45900 [ 42.175179] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 42.181028] CR2: 0000000020685ff0 CR3: 00000000b2eaa000 CR4: 0000000000160670 [ 42.188269] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.195510] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.202762] Stack: [ 42.204877] 00000001cbfc8088 ffff8801cbfc8000 ffff8801cbfc8088 dffffc0000000000 [ 42.212839] ffff8801cbfc8000 0000000000000000 ffffed00397f9086 ffff8801cf3aab40 [ 42.220809] ffff8800b199f688 ffffffff82df89e6 ffff8801cbfc8188 ffff8801cbfc8190 [ 42.228773] Call Trace: [ 42.231331] [] release_sock+0x176/0x510 [ 42.236923] [] udp_sendmsg+0x15c4/0x1c30 [ 42.242604] [] ? udp_push_pending_frames+0xe0/0xe0 [ 42.249150] [] ? udp_seq_next+0x80/0x80 [ 42.254753] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 42.261736] [] ? avc_has_perm+0x296/0x500 [ 42.267510] [] ? __lock_acquire+0xb5f/0x4b50 [ 42.273547] [] udpv6_sendmsg+0x1434/0x2500 [ 42.279399] [] ? avc_has_perm+0x296/0x500 [ 42.285166] [] ? udp6_lib_lookup+0x60/0x60 [ 42.291021] [] ? avc_has_perm_noaudit+0x460/0x460 [ 42.297483] [] ? sock_has_perm+0x1c2/0x3e0 [ 42.303337] [] ? sock_has_perm+0x292/0x3e0 [ 42.309192] [] ? sock_has_perm+0x9f/0x3e0 [ 42.314960] [] ? inet_sendmsg+0x201/0x4c0 [ 42.320727] [] inet_sendmsg+0x2bc/0x4c0 [ 42.326318] [] ? inet_sendmsg+0x73/0x4c0 [ 42.331996] [] ? inet_recvmsg+0x4c0/0x4c0 [ 42.337760] [] sock_sendmsg+0xca/0x110 [ 42.343267] [] SYSC_sendto+0x2c8/0x340 [ 42.348771] [] ? SYSC_connect+0x310/0x310 [ 42.354548] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 42.361530] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 42.368251] [] ? __fget_light+0xa1/0x1e0 [ 42.373930] [] ? __fdget+0x18/0x20 [ 42.379088] [] ? sockfd_lookup_light+0x118/0x160 [ 42.385467] [] ? sock_release+0x1e0/0x1e0 [ 42.391233] [] ? mntput+0x66/0x90 [ 42.396317] [] SyS_sendto+0x40/0x50 [ 42.401569] [] ? SyS_getpeername+0x30/0x30 [ 42.407421] [] do_fast_syscall_32+0x314/0x890 [ 42.413536] [] sysenter_flags_fixed+0xd/0x17 [ 42.419559] Code: 74 24 58 41 f6 c6 01 0f 85 b7 07 00 00 e8 28 da fe fd 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 7c 0b 00 00 41 f6 46 60 04 [ 42.446127] RIP [] udpv6_queue_rcv_skb+0x191/0x1510 [ 42.452890] RSP [ 42.456530] ---[ end trace 0288937e589e45b2 ]--- [ 42.461266] Kernel panic - not syncing: Fatal exception in interrupt [ 42.468104] Dumping ftrace buffer: [ 42.471613] (ftrace buffer empty) [ 42.475303] Kernel Offset: disabled [ 42.478906] Rebooting in 86400 seconds..