[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.559677] 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: [ 19.361126] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 19.779331] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 20.593876] random: sshd: uninitialized urandom read (32 bytes read, 92 bits of entropy available) [ 20.776766] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) Warning: Permanently added '10.128.15.239' (ECDSA) to the list of known hosts. [ 26.169119] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) executing program [ 26.271385] kasan: CONFIG_KASAN_INLINE enabled [ 26.275806] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.288582] Dumping ftrace buffer: [ 26.292098] (ftrace buffer empty) [ 26.295775] Modules linked in: [ 26.299056] CPU: 1 PID: 3318 Comm: syzkaller322911 Not tainted 4.4.110-gdac1439 #20 [ 26.306810] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.316130] task: ffff8800b57297c0 task.stack: ffff8800b4f10000 [ 26.322149] RIP: 0010:[] [] __xfrm_policy_unlink+0x1a9/0x370 [ 26.331241] RSP: 0018:ffff8800b4f177f0 EFLAGS: 00010246 [ 26.336657] RAX: 0000000000000000 RBX: ffff8800b47bc400 RCX: 0000000000000000 [ 26.343892] RDX: dffffc0000000000 RSI: 1ffff1003b1ec138 RDI: ffff8800b47bc420 [ 26.351130] RBP: ffff8800b4f17828 R08: 0000000000000001 R09: ffffffff850cee60 [ 26.358367] R10: 0000000000000001 R11: 1ffff100169e2ece R12: ffff8800b47bc590 [ 26.366129] R13: ffff8801d8f609c0 R14: ffffffff846ee980 R15: 0000000000000000 [ 26.373365] FS: 00007f44f0cf7700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 26.381555] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.387402] CR2: 0000000020d9efdf CR3: 000000000420c000 CR4: 0000000000160670 [ 26.394643] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.401877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.409110] Stack: [ 26.411223] 0000000000000000 0000000300000003 ffffffff846f0378 ffff8800b47bc400 [ 26.419180] 0000000000000003 ffffffff8336dab0 ffffffff82de99a0 ffff8800b4f17850 [ 26.427135] ffffffff8329f9a9 ffff8800b6428000 ffff8800b64281c0 ffff8800b47bc400 [ 26.435084] Call Trace: [ 26.437639] [] ? udp_v6_flush_pending_frames+0xe0/0xe0 [ 26.444537] [] ? sock_release+0x1e0/0x1e0 [ 26.450299] [] xfrm_policy_delete+0x49/0x90 [ 26.456236] [] sk_common_release+0x218/0x300 [ 26.462260] [] udp_lib_close+0x15/0x20 [ 26.467761] [] inet_release+0xfa/0x1d0 [ 26.473259] [] inet6_release+0x50/0x70 [ 26.478762] [] sock_release+0x8d/0x1e0 [ 26.484263] [] sock_close+0x16/0x20 [ 26.489505] [] __fput+0x233/0x6d0 [ 26.494577] [] ____fput+0x15/0x20 [ 26.499648] [] task_work_run+0x104/0x180 [ 26.505322] [] do_exit+0x871/0x2a20 [ 26.510566] [] ? get_futex_key_refs.isra.9+0xa0/0xa0 [ 26.517283] [] ? release_task+0x1240/0x1240 [ 26.523219] [] ? recalc_sigpending+0x76/0xa0 [ 26.529241] [] do_group_exit+0x108/0x320 [ 26.534914] [] get_signal+0x565/0x1660 [ 26.540503] [] do_signal+0x8b/0x1d40 [ 26.545836] [] ? __fd_install+0x25f/0x5f0 [ 26.551601] [] ? setup_sigcontext+0x780/0x780 [ 26.557712] [] ? get_unused_fd_flags+0xd0/0xd0 [ 26.563912] [] ? sock_splice_read+0xf0/0xf0 [ 26.569853] [] ? _raw_spin_unlock+0x2c/0x50 [ 26.575791] [] ? __alloc_fd+0x1e3/0x500 [ 26.581380] [] ? SyS_futex+0x210/0x2c0 [ 26.586896] [] ? fd_install+0x4d/0x60 [ 26.592314] [] ? exit_to_usermode_loop+0xec/0x170 [ 26.598770] [] exit_to_usermode_loop+0x122/0x170 [ 26.605141] [] syscall_return_slowpath+0x1b5/0x1f0 [ 26.611683] [] int_ret_from_sys_call+0x25/0xa3 [ 26.617874] Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bd 01 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 43 20 48 89 c1 48 c1 e9 03 <80> 3c 11 00 0f 85 5d 01 00 00 4d 85 ff 4c 89 38 48 89 45 c8 74 [ 26.644210] RIP [] __xfrm_policy_unlink+0x1a9/0x370 [ 26.650957] RSP [ 26.654580] ---[ end trace 0902b6599510aef2 ]--- [ 26.659312] Kernel panic - not syncing: Fatal exception in interrupt [ 26.666204] Dumping ftrace buffer: [ 26.669716] (ftrace buffer empty) [ 26.673390] Kernel Offset: disabled [ 26.676982] Rebooting in 86400 seconds..