Starting mcstransd: [ 21.215712] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.041693] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 25.505608] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 26.422571] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts. executing program [ 32.160331] ------------[ cut here ]------------ [ 32.165110] WARNING: CPU: 0 PID: 3766 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x62a/0x15f0() [ 32.175336] Kernel panic - not syncing: panic_on_warn set ... [ 32.175336] [ 32.182684] CPU: 0 PID: 3766 Comm: syzkaller823556 Not tainted 4.4.119-g855ea74 #28 [ 32.190445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.199767] 0000000000000000 e8b4ed38289fc44b ffff8801d913f688 ffffffff81d0402d [ 32.207737] ffffffff83843b40 ffff8801d913f760 ffffffff8389b340 0000000000000009 [ 32.215699] 0000000000000bfd ffff8801d913f750 ffffffff8141aaea 0000000041b58ab3 [ 32.223653] Call Trace: [ 32.226213] [] dump_stack+0xc1/0x124 [ 32.231550] [] panic+0x1aa/0x388 [ 32.236537] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 32.243429] [] ? pm_qos_get_value.part.4+0xb/0xb [ 32.249802] [] ? warn_slowpath_common+0x10a/0x140 [ 32.256274] [] warn_slowpath_common+0x125/0x140 [ 32.262561] [] ? __alloc_pages_nodemask+0x62a/0x15f0 [ 32.269280] [] warn_slowpath_null+0x29/0x30 [ 32.275216] [] __alloc_pages_nodemask+0x62a/0x15f0 [ 32.281761] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 32.288744] [] ? __ww_mutex_lock_interruptible+0x14d0/0x14d0 [ 32.296159] [] ? __alloc_pages_direct_compact+0x250/0x250 [ 32.303312] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 32.310292] [] ? mntput_no_expire+0xca/0x680 [ 32.316320] [] ? mntput_no_expire+0xf6/0x680 [ 32.322343] [] ? mnt_get_count+0x190/0x190 [ 32.328201] [] ? dput.part.19+0x16d/0x760 [ 32.333965] [] ? dput.part.19+0x2a/0x760 [ 32.339644] [] ? depot_save_stack+0x276/0x640 [ 32.345756] [] alloc_kmem_pages+0x12/0x20 [ 32.351521] [] kmalloc_order+0x1f/0x70 [ 32.357024] [] kmalloc_order_trace+0x1f/0x1a0 [ 32.363135] [] __kmalloc+0x1a6/0x320 [ 32.368468] [] vga_arb_write+0xda/0xda0 [ 32.374059] [] ? save_stack_trace+0x26/0x50 [ 32.379998] [] ? vga_get+0x420/0x420 [ 32.385328] [] ? do_sys_open+0x254/0x660 [ 32.391006] [] ? compat_SyS_openat+0x2d/0x40 [ 32.397036] [] ? do_fast_syscall_32+0x321/0x8a0 [ 32.403321] [] ? sysenter_flags_fixed+0xd/0x17 [ 32.409524] [] ? debug_check_no_obj_freed+0x166/0x9b0 [ 32.416336] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 32.423228] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 32.430034] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 32.436929] [] ? vga_get+0x420/0x420 [ 32.442261] [] __vfs_write+0x103/0x450 [ 32.447771] [] ? quarantine_put+0xab/0x180 [ 32.453624] [] ? __vfs_read+0x440/0x440 [ 32.459215] [] ? check_preemption_disabled+0x3b/0x200 [ 32.466019] [] ? check_preemption_disabled+0x3b/0x200 [ 32.472831] [] ? putname+0xee/0x130 [ 32.478074] [] ? avc_policy_seqno+0x9/0x20 [ 32.483927] [] ? selinux_file_permission+0x348/0x460 [ 32.490653] [] ? security_file_permission+0x89/0x1e0 [ 32.497631] [] ? rw_verify_area+0x100/0x2f0 [ 32.503573] [] vfs_write+0x18a/0x530 [ 32.508902] [] SyS_write+0xd9/0x1b0 [ 32.514145] [] ? SyS_read+0x1b0/0x1b0 [ 32.519561] [] ? vmacache_update+0xfe/0x130 [ 32.525498] [] ? do_fast_syscall_32+0xd7/0x8a0 [ 32.531696] [] ? SyS_read+0x1b0/0x1b0 [ 32.537116] [] do_fast_syscall_32+0x321/0x8a0 [ 32.543239] [] sysenter_flags_fixed+0xd/0x17 [ 32.549893] Dumping ftrace buffer: [ 32.553446] (ftrace buffer empty) [ 32.557124] Kernel Offset: disabled [ 32.560730] Rebooting in 86400 seconds..