[ 16.169274] random: sshd: uninitialized urandom read (32 bytes read, 32 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: [ 21.887081] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.239673] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 23.125493] random: sshd: uninitialized urandom read (32 bytes read, 114 bits of entropy available) [ 23.307080] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) Warning: Permanently added '10.128.15.207' (ECDSA) to the list of known hosts. [ 28.675134] random: nonblocking pool is initialized executing program executing program [ 28.779101] ------------[ cut here ]------------ [ 28.783882] WARNING: CPU: 0 PID: 3310 at net/xfrm/xfrm_user.c:2075 xfrm_add_pol_expire+0x5b3/0x6d0() [ 28.793163] Don't know what to do with soft policy expire [ 28.798950] Kernel panic - not syncing: panic_on_warn set ... [ 28.798950] [ 28.806282] CPU: 0 PID: 3310 Comm: syzkaller792720 Not tainted 4.4.107-g610c835 #12 [ 28.814036] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.823353] 0000000000000000 d5b289bef6a2da75 ffff8801d0acf420 ffffffff81d0457d [ 28.831294] ffffffff838429a0 ffff8801d0acf4f8 ffffffff83d09540 0000000000000009 [ 28.839236] 000000000000081b ffff8801d0acf4e8 ffffffff8141774a 0000000041b58ab3 [ 28.847177] Call Trace: [ 28.849729] [] dump_stack+0xc1/0x124 [ 28.855057] [] panic+0x1aa/0x388 [ 28.860035] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 28.866926] [] ? warn_slowpath_common+0x10a/0x140 [ 28.873379] [] warn_slowpath_common+0x125/0x140 [ 28.879664] [] ? xfrm_add_pol_expire+0x5b3/0x6d0 [ 28.886032] [] warn_slowpath_fmt+0xc1/0x110 [ 28.891964] [] ? warn_slowpath_common+0x140/0x140 [ 28.898420] [] ? trace_hardirqs_on+0xd/0x10 [ 28.904709] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 28.910995] [] ? xfrm_policy_byid+0x2a5/0x370 [ 28.917102] [] ? xfrm_add_pol_expire+0x59b/0x6d0 [ 28.923469] [] xfrm_add_pol_expire+0x5b3/0x6d0 [ 28.929662] [] ? xfrm_add_policy+0x680/0x680 [ 28.935684] [] ? nla_parse+0x213/0x260 [ 28.941189] [] ? xfrm_add_policy+0x680/0x680 [ 28.947209] [] xfrm_user_rcv_msg+0x41c/0x6b0 [ 28.953229] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 28.959251] [] ? __lock_acquire+0xb5f/0x4b50 [ 28.965276] [] ? avc_has_perm_noaudit+0x460/0x460 [ 28.971730] [] netlink_rcv_skb+0x13e/0x370 [ 28.977582] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 28.983602] [] xfrm_netlink_rcv+0x6f/0x90 [ 28.989364] [] netlink_unicast+0x522/0x760 [ 28.995210] [] ? netlink_unicast+0x44f/0x760 [ 29.001231] [] ? netlink_attachskb+0x6c0/0x6c0 [ 29.007426] [] netlink_sendmsg+0x8e8/0xc50 [ 29.013274] [] ? netlink_unicast+0x760/0x760 [ 29.019297] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 29.025752] [] ? security_socket_sendmsg+0x89/0xb0 [ 29.032291] [] ? netlink_unicast+0x760/0x760 [ 29.038314] [] sock_sendmsg+0xca/0x110 [ 29.043812] [] ___sys_sendmsg+0x6c1/0x7c0 [ 29.049573] [] ? copy_msghdr_from_user+0x550/0x550 [ 29.056116] [] ? __lock_is_held+0xa1/0xf0 [ 29.061875] [] ? check_preemption_disabled+0x3b/0x200 [ 29.068677] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 29.075653] [] ? _raw_spin_unlock+0x2c/0x50 [ 29.081587] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 29.088566] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 29.095283] [] ? __fget_light+0xa1/0x1e0 [ 29.100955] [] ? __fdget+0x18/0x20 [ 29.106109] [] __sys_sendmsg+0xd3/0x190 [ 29.111697] [] ? SyS_shutdown+0x1b0/0x1b0 [ 29.117457] [] ? memset+0x31/0x40 [ 29.122531] [] ? vmacache_update+0xfe/0x130 [ 29.128466] [] ? __do_page_fault+0x380/0xa00 [ 29.134487] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 29.141290] [] SyS_sendmsg+0x2d/0x50 [ 29.146618] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 29.153698] Dumping ftrace buffer: [ 29.157247] (ftrace buffer empty) [ 29.160925] Kernel Offset: disabled [ 29.164530] Rebooting in 86400 seconds..