[ 17.713607] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.811711] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.123494] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.858659] random: sshd: uninitialized urandom read (32 bytes read, 67 bits of entropy available) [ 22.043028] random: sshd: uninitialized urandom read (32 bytes read, 73 bits of entropy available) Warning: Permanently added '10.128.15.228' (ECDSA) to the list of known hosts. [ 27.457884] random: sshd: uninitialized urandom read (32 bytes read, 79 bits of entropy available) executing program executing program [ 27.560527] ------------[ cut here ]------------ [ 27.565319] WARNING: CPU: 1 PID: 3319 at net/xfrm/xfrm_user.c:2075 xfrm_add_pol_expire+0x5b3/0x6d0() [ 27.574601] Don't know what to do with soft policy expire [ 27.580900] Kernel panic - not syncing: panic_on_warn set ... [ 27.580900] [ 27.588254] CPU: 1 PID: 3319 Comm: syzkaller109521 Not tainted 4.4.111-g7902639 #25 [ 27.596017] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.605340] 0000000000000000 9dcae297e62f77fc ffff8800b4ec7420 ffffffff81d0509d [ 27.613328] ffffffff83842f60 ffff8800b4ec74f8 ffffffff83d0a280 0000000000000009 [ 27.621314] 000000000000081b ffff8800b4ec74e8 ffffffff81419a3a 0000000041b58ab3 [ 27.629287] Call Trace: [ 27.631847] [] dump_stack+0xc1/0x124 [ 27.637183] [] panic+0x1aa/0x388 [ 27.642170] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 27.649068] [] ? warn_slowpath_common+0x10a/0x140 [ 27.655537] [] warn_slowpath_common+0x125/0x140 [ 27.661831] [] ? xfrm_add_pol_expire+0x5b3/0x6d0 [ 27.668206] [] warn_slowpath_fmt+0xc1/0x110 [ 27.674146] [] ? warn_slowpath_common+0x140/0x140 [ 27.680607] [] ? trace_hardirqs_on+0xd/0x10 [ 27.686549] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 27.692838] [] ? xfrm_policy_byid+0x2a5/0x370 [ 27.698955] [] ? xfrm_add_pol_expire+0x59b/0x6d0 [ 27.705331] [] xfrm_add_pol_expire+0x5b3/0x6d0 [ 27.711533] [] ? xfrm_add_policy+0x680/0x680 [ 27.717564] [] ? nla_parse+0x213/0x260 [ 27.723069] [] ? xfrm_add_policy+0x680/0x680 [ 27.729097] [] xfrm_user_rcv_msg+0x41c/0x6b0 [ 27.735123] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 27.741149] [] ? __lock_acquire+0xb5f/0x4b50 [ 27.747188] [] ? avc_has_perm_noaudit+0x460/0x460 [ 27.753650] [] netlink_rcv_skb+0x13e/0x370 [ 27.759504] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 27.765539] [] xfrm_netlink_rcv+0x6f/0x90 [ 27.771311] [] netlink_unicast+0x522/0x760 [ 27.777166] [] ? netlink_unicast+0x44f/0x760 [ 27.783206] [] ? netlink_attachskb+0x6c0/0x6c0 [ 27.789410] [] netlink_sendmsg+0x8e8/0xc50 [ 27.795274] [] ? netlink_unicast+0x760/0x760 [ 27.801305] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 27.809682] [] ? security_socket_sendmsg+0x89/0xb0 [ 27.816671] [] ? netlink_unicast+0x760/0x760 [ 27.822711] [] sock_sendmsg+0xca/0x110 [ 27.828219] [] ___sys_sendmsg+0x6c1/0x7c0 [ 27.833990] [] ? copy_msghdr_from_user+0x550/0x550 [ 27.840539] [] ? __lock_is_held+0xa1/0xf0 [ 27.846306] [] ? check_preemption_disabled+0x3b/0x200 [ 27.853116] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 27.860100] [] ? _raw_spin_unlock+0x2c/0x50 [ 27.866043] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 27.873027] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 27.879748] [] ? __fget_light+0xa1/0x1e0 [ 27.885442] [] ? __fdget+0x18/0x20 [ 27.890620] [] __sys_sendmsg+0xd3/0x190 [ 27.896216] [] ? SyS_shutdown+0x1b0/0x1b0 [ 27.901988] [] ? memset+0x31/0x40 [ 27.907063] [] ? vmacache_update+0xfe/0x130 [ 27.913004] [] ? __do_page_fault+0x380/0xa00 [ 27.919033] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.925845] [] SyS_sendmsg+0x2d/0x50 [ 27.931180] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 27.938348] Dumping ftrace buffer: [ 27.941970] (ftrace buffer empty) [ 27.945659] Kernel Offset: disabled [ 27.950322] Rebooting in 86400 seconds..