[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.621760] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.312772] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.628157] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 23.596349] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) [ 23.756159] random: sshd: uninitialized urandom read (32 bytes read, 120 bits of entropy available) Warning: Permanently added '10.128.0.59' (ECDSA) to the list of known hosts. [ 29.132387] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) executing program [ 29.227329] ------------[ cut here ]------------ [ 29.232295] WARNING: CPU: 0 PID: 3774 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x62a/0x15f0() [ 29.241594] Kernel panic - not syncing: panic_on_warn set ... [ 29.241594] [ 29.248944] CPU: 0 PID: 3774 Comm: syzkaller351535 Not tainted 4.4.118-g239a415 #26 [ 29.256712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.266038] 0000000000000000 0f6d5b61141639fd ffff8800ad75f6d0 ffffffff81d0402d [ 29.274004] ffffffff83843b40 ffff8800ad75f7a8 ffffffff8389b340 0000000000000009 [ 29.281972] 0000000000000bfd ffff8800ad75f798 ffffffff8141aaea 0000000041b58ab3 [ 29.289943] Call Trace: [ 29.292504] [] dump_stack+0xc1/0x124 [ 29.297836] [] panic+0x1aa/0x388 [ 29.302819] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 29.309717] [] ? pm_qos_get_value.part.4+0xb/0xb [ 29.316095] [] ? warn_slowpath_common+0x10a/0x140 [ 29.322554] [] warn_slowpath_common+0x125/0x140 [ 29.328842] [] ? __alloc_pages_nodemask+0x62a/0x15f0 [ 29.335564] [] warn_slowpath_null+0x29/0x30 [ 29.341504] [] __alloc_pages_nodemask+0x62a/0x15f0 [ 29.348052] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 29.354859] [] ? __alloc_pages_direct_compact+0x250/0x250 [ 29.362018] [] ? print_context_stack+0x48/0xc0 [ 29.368214] [] ? dump_trace+0x14f/0x350 [ 29.373807] [] ? depot_save_stack+0x1c3/0x640 [ 29.379921] [] ? save_stack+0x43/0xd0 [ 29.385336] [] ? kasan_kmalloc+0xad/0xe0 [ 29.391012] [] ? kasan_slab_alloc+0x12/0x20 [ 29.396950] [] ? kmem_cache_alloc+0xba/0x290 [ 29.402978] [] ? ptlock_alloc+0x24/0x70 [ 29.408860] [] ? pte_alloc_one+0x62/0x100 [ 29.414628] [] alloc_kmem_pages+0x12/0x20 [ 29.420391] [] kmalloc_order+0x1f/0x70 [ 29.425894] [] kmalloc_order_trace+0x1f/0x1a0 [ 29.432014] [] __kmalloc+0x1a6/0x320 [ 29.437347] [] keychord_write+0xd2/0xbd0 [ 29.443029] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 29.450015] [] ? ___slab_alloc.constprop.76+0x3a5/0x530 [ 29.457001] [] ? keychord_read+0x510/0x510 [ 29.462867] [] ? keychord_read+0x510/0x510 [ 29.468721] [] __vfs_write+0x103/0x450 [ 29.474230] [] ? __vfs_read+0x440/0x440 [ 29.479824] [] ? _raw_spin_unlock+0x2c/0x50 [ 29.485773] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 29.492771] [] ? avc_policy_seqno+0x9/0x20 [ 29.498628] [] ? selinux_file_permission+0x348/0x460 [ 29.505352] [] ? security_file_permission+0x89/0x1e0 [ 29.512077] [] ? rw_verify_area+0x100/0x2f0 [ 29.518015] [] vfs_write+0x18a/0x530 [ 29.523362] [] SyS_write+0xd9/0x1b0 [ 29.528635] [] ? SyS_read+0x1b0/0x1b0 [ 29.534063] [] ? do_fast_syscall_32+0xd7/0x8a0 [ 29.540270] [] ? SyS_read+0x1b0/0x1b0 [ 29.545688] [] do_fast_syscall_32+0x321/0x8a0 [ 29.551804] [] sysenter_flags_fixed+0xd/0x17 [ 29.558325] Dumping ftrace buffer: [ 29.561877] (ftrace buffer empty) [ 29.565556] Kernel Offset: disabled [ 29.569164] Rebooting in 86400 seconds..