[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.227289] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.323599] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.759227] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.565951] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) [ 22.732716] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available) Warning: Permanently added 'ci-android-44-kasan-gce-0,10.128.15.239' (ECDSA) to the list of known hosts. [ 28.160251] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available) executing program [ 28.257830] ------------[ cut here ]------------ [ 28.263786] WARNING: CPU: 1 PID: 3309 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x62a/0x16e0() [ 28.273084] Kernel panic - not syncing: panic_on_warn set ... [ 28.273084] [ 28.280436] CPU: 1 PID: 3309 Comm: syzkaller397373 Not tainted 4.4.106-g1700518 #9 [ 28.288110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.297444] 0000000000000000 0bcf11e59ac9650b ffff8801d088f458 ffffffff81d02f7d [ 28.305383] ffffffff838429a0 ffff8801d088f530 ffffffff83899f80 0000000000000009 [ 28.313335] 0000000000000bfd ffff8801d088f520 ffffffff8141654a 0000000041b58ab3 [ 28.321296] Call Trace: [ 28.323859] [] dump_stack+0xc1/0x124 [ 28.329201] [] panic+0x1aa/0x388 [ 28.334192] [] ? percpu_up_read.constprop.46+0xe1/0xe1 [ 28.341089] [] ? pm_qos_get_value.part.5+0xb/0xb [ 28.347482] [] ? warn_slowpath_common+0x10a/0x140 [ 28.353947] [] warn_slowpath_common+0x125/0x140 [ 28.360235] [] ? __alloc_pages_nodemask+0x62a/0x16e0 [ 28.366953] [] warn_slowpath_null+0x29/0x30 [ 28.372893] [] __alloc_pages_nodemask+0x62a/0x16e0 [ 28.379445] [] ? mark_held_locks+0xaf/0x100 [ 28.385397] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 28.392302] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 28.399116] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 28.406005] [] ? depot_save_stack+0x1c3/0x640 [ 28.412119] [] ? save_stack+0xa3/0xd0 [ 28.417534] [] ? save_stack+0x43/0xd0 [ 28.422948] [] ? __alloc_pages_direct_compact+0x250/0x250 [ 28.430101] [] ? blk_trace_ioctl+0x1de/0x300 [ 28.436125] [] ? blkdev_ioctl+0xa80/0x1990 [ 28.441977] [] ? block_ioctl+0xde/0x120 [ 28.447564] [] ? do_vfs_ioctl+0x7aa/0xee0 [ 28.453324] [] ? SyS_ioctl+0x8f/0xc0 [ 28.458655] [] ? entry_SYSCALL_64_fastpath+0x16/0x76 [ 28.465371] [] ? dump_trace+0x14c/0x350 [ 28.470966] [] ? save_stack_trace+0x26/0x50 [ 28.476902] [] ? __lock_is_held+0xa1/0xf0 [ 28.482664] [] alloc_kmem_pages+0x12/0x20 [ 28.488428] [] kmalloc_order+0x1f/0x70 [ 28.493927] [] kmalloc_order_trace+0x1f/0x1a0 [ 28.500036] [] __kmalloc+0x1a6/0x320 [ 28.505365] [] relay_open_buf.part.12+0xc8/0x930 [ 28.511735] [] ? _find_next_bit.part.0+0xe0/0x120 [ 28.518189] [] ? memcpy+0x45/0x50 [ 28.523257] [] relay_open+0x472/0x760 [ 28.528671] [] do_blk_trace_setup+0x3e9/0x950 [ 28.534776] [] blk_trace_setup+0xcf/0x170 [ 28.540535] [] ? do_blk_trace_setup+0x950/0x950 [ 28.546817] [] ? disk_name+0xc7/0x140 [ 28.552238] [] blk_trace_ioctl+0x1de/0x300 [ 28.558090] [] ? compat_blk_trace_setup+0x230/0x230 [ 28.564721] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 28.571699] [] ? avc_ss_reset+0x110/0x110 [ 28.577461] [] blkdev_ioctl+0xa97/0x1990 [ 28.583133] [] ? blkpg_ioctl+0x910/0x910 [ 28.588807] [] ? check_preemption_disabled+0x3b/0x200 [ 28.595610] [] ? handle_mm_fault+0xbf5/0x3190 [ 28.601718] [] ? _raw_spin_unlock+0x2c/0x50 [ 28.607654] [] block_ioctl+0xde/0x120 [ 28.613074] [] ? blkdev_read_iter+0x170/0x170 [ 28.619181] [] do_vfs_ioctl+0x7aa/0xee0 [ 28.624770] [] ? ioctl_preallocate+0x1f0/0x1f0 [ 28.630973] [] ? __do_page_fault+0x380/0xa00 [ 28.636997] [] ? security_file_ioctl+0x89/0xb0 [ 28.643191] [] SyS_ioctl+0x8f/0xc0 [ 28.648347] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 28.655411] Dumping ftrace buffer: [ 28.658962] (ftrace buffer empty) [ 28.662636] Kernel Offset: disabled [ 28.666248] Rebooting in 86400 seconds..