[....] Starting OpenBSD Secure Shell server: sshd[ 18.210679] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.598575] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 19.901580] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 20.740232] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) [ 42.165470] random: sshd: uninitialized urandom read (32 bytes read, 122 bits of entropy available) [ 49.417702] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. executing program [ 71.673731] ------------[ cut here ]------------ [ 71.679768] WARNING: CPU: 1 PID: 3813 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x62a/0x15f0() [ 71.689321] Kernel panic - not syncing: panic_on_warn set ... [ 71.689321] [ 71.696654] CPU: 1 PID: 3813 Comm: syzkaller767862 Not tainted 4.4.115-g6b8924e #10 [ 71.704421] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.713747] 0000000000000000 b927c70682a05a8a ffff8800bafa7180 ffffffff81d03dad [ 71.721775] ffffffff83843a40 ffff8800bafa7258 ffffffff8389b140 0000000000000009 [ 71.729739] 0000000000000bfd ffff8800bafa7248 ffffffff8141acca 0000000041b58ab3 [ 71.737697] Call Trace: [ 71.740255] [] dump_stack+0xc1/0x124 [ 71.745596] [] panic+0x1aa/0x388 [ 71.750578] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 71.757478] [] ? pm_qos_get_value.part.4+0xb/0xb [ 71.763854] [] ? netlink_unicast+0x522/0x760 [ 71.769881] [] ? warn_slowpath_common+0x10a/0x140 [ 71.776338] [] warn_slowpath_common+0x125/0x140 [ 71.782622] [] ? __alloc_pages_nodemask+0x62a/0x15f0 [ 71.789342] [] warn_slowpath_null+0x29/0x30 [ 71.795277] [] __alloc_pages_nodemask+0x62a/0x15f0 [ 71.801821] [] ? memcpy+0x45/0x50 [ 71.806892] [] ? __alloc_pages_direct_compact+0x250/0x250 [ 71.814051] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 71.821030] [] ? hmac_setkey+0x51a/0x690 [ 71.826706] [] ? hmac_setkey+0x2f/0x690 [ 71.832298] [] ? xfrm_state_get_afinfo+0x1b/0x1d0 [ 71.838757] [] alloc_kmem_pages+0x12/0x20 [ 71.844523] [] kmalloc_order+0x1f/0x70 [ 71.850035] [] kmalloc_order_trace+0x1f/0x1a0 [ 71.856143] [] ? xfrm_get_mode.part.26+0x157/0x2a0 [ 71.862691] [] __kmalloc+0x1a6/0x320 [ 71.868023] [] xfrm_add_sa+0x19ea/0x2e40 [ 71.873700] [] ? xfrm_send_state_notify+0x17d0/0x17d0 [ 71.880506] [] ? nla_parse+0x213/0x260 [ 71.886008] [] ? xfrm_send_state_notify+0x17d0/0x17d0 [ 71.892812] [] xfrm_user_rcv_msg+0x41c/0x6b0 [ 71.898837] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 71.904863] [] ? ksize+0x92/0xf0 [ 71.910024] [] ? avc_has_perm_noaudit+0x460/0x460 [ 71.916482] [] netlink_rcv_skb+0x13e/0x370 [ 71.922330] [] ? xfrm_dump_sa_done+0xa0/0xa0 [ 71.928355] [] xfrm_netlink_rcv+0x6f/0x90 [ 71.934117] [] netlink_unicast+0x522/0x760 [ 71.939974] [] ? netlink_unicast+0x44f/0x760 [ 71.946007] [] ? netlink_attachskb+0x6c0/0x6c0 [ 71.952203] [] netlink_sendmsg+0x8e8/0xc50 [ 71.958053] [] ? netlink_unicast+0x760/0x760 [ 71.964079] [] ? selinux_socket_sendmsg+0x3f/0x50 [ 71.970538] [] ? security_socket_sendmsg+0x89/0xb0 [ 71.977085] [] ? netlink_unicast+0x760/0x760 [ 71.983108] [] sock_sendmsg+0xca/0x110 [ 71.988610] [] ___sys_sendmsg+0x6c1/0x7c0 [ 71.994381] [] ? copy_msghdr_from_user+0x550/0x550 [ 72.000933] [] ? quarantine_reduce+0x1b5/0x1d0 [ 72.007130] [] ? quarantine_reduce+0x92/0x1d0 [ 72.013242] [] ? check_preemption_disabled+0x3b/0x200 [ 72.020047] [] ? __lru_cache_add+0x164/0x240 [ 72.026073] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 72.033056] [] ? _raw_spin_unlock+0x2c/0x50 [ 72.038993] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 72.045973] [] ? __fget_light+0xa1/0x1e0 [ 72.051653] [] ? __fdget+0x18/0x20 [ 72.056810] [] __sys_sendmsg+0xd3/0x190 [ 72.062400] [] ? SyS_shutdown+0x1b0/0x1b0 [ 72.068164] [] ? __do_page_fault+0x290/0xa00 [ 72.074190] [] ? __do_page_fault+0x380/0xa00 [ 72.080216] [] ? move_addr_to_kernel+0x50/0x50 [ 72.086423] [] SyS_sendmsg+0x2d/0x50 [ 72.091759] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 72.098699] Dumping ftrace buffer: [ 72.102208] (ftrace buffer empty) [ 72.105886] Kernel Offset: disabled [ 72.109481] Rebooting in 86400 seconds..