[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.749021] 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: [ 19.307722] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 19.512803] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 20.316778] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) [ 20.475836] random: sshd: uninitialized urandom read (32 bytes read, 112 bits of entropy available) Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts. [ 47.451327] random: nonblocking pool is initialized executing program [ 47.557860] ------------[ cut here ]------------ [ 47.562674] WARNING: CPU: 1 PID: 3786 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x62a/0x15f0() [ 47.572165] Kernel panic - not syncing: panic_on_warn set ... [ 47.572165] [ 47.579500] CPU: 1 PID: 3786 Comm: syzkaller061391 Not tainted 4.4.115-g6b8924e #10 [ 47.587262] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.596588] 0000000000000000 c18732c64eea1293 ffff8801c5f8f4e8 ffffffff81d03dad [ 47.604557] ffffffff83843a40 ffff8801c5f8f5c0 ffffffff8389b140 0000000000000009 [ 47.612521] 0000000000000bfd ffff8801c5f8f5b0 ffffffff8141acca 0000000041b58ab3 [ 47.620490] Call Trace: [ 47.623055] [] dump_stack+0xc1/0x124 [ 47.628391] [] panic+0x1aa/0x388 [ 47.633377] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 47.640272] [] ? pm_qos_get_value.part.4+0xb/0xb [ 47.646659] [] ? warn_slowpath_common+0x10a/0x140 [ 47.653120] [] warn_slowpath_common+0x125/0x140 [ 47.659408] [] ? __alloc_pages_nodemask+0x62a/0x15f0 [ 47.666132] [] warn_slowpath_null+0x29/0x30 [ 47.672071] [] __alloc_pages_nodemask+0x62a/0x15f0 [ 47.678619] [] ? depot_save_stack+0x1c3/0x640 [ 47.684733] [] ? save_stack+0xa3/0xd0 [ 47.690166] [] ? save_stack+0x43/0xd0 [ 47.695600] [] ? __alloc_pages_direct_compact+0x250/0x250 [ 47.702757] [] ? blk_trace_ioctl+0x1de/0x300 [ 47.708785] [] ? blkdev_ioctl+0x9f0/0x1990 [ 47.714639] [] ? block_ioctl+0xde/0x120 [ 47.720230] [] ? do_vfs_ioctl+0x7aa/0xee0 [ 47.725995] [] ? SyS_ioctl+0x8f/0xc0 [ 47.731330] [] ? entry_SYSCALL_64_fastpath+0x1c/0x98 [ 47.738057] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 47.745039] [] ? relay_open+0x91/0x760 [ 47.750551] [] ? do_blk_trace_setup+0x3e9/0x950 [ 47.756853] [] ? blk_trace_setup+0xcf/0x170 [ 47.762878] [] ? blk_trace_ioctl+0x1de/0x300 [ 47.768907] [] ? blkdev_ioctl+0xa97/0x1990 [ 47.774761] [] ? block_ioctl+0xde/0x120 [ 47.780353] [] ? do_vfs_ioctl+0x7aa/0xee0 [ 47.786123] [] ? SyS_ioctl+0x8f/0xc0 [ 47.791464] [] ? entry_SYSCALL_64_fastpath+0x1c/0x98 [ 47.798203] [] ? __mutex_unlock_slowpath+0x208/0x3b0 [ 47.804946] [] alloc_kmem_pages+0x12/0x20 [ 47.810712] [] kmalloc_order+0x1f/0x70 [ 47.816221] [] kmalloc_order_trace+0x1f/0x1a0 [ 47.822349] [] __kmalloc+0x1a6/0x320 [ 47.827682] [] relay_open_buf.part.12+0xc8/0x930 [ 47.834060] [] ? _find_next_bit.part.0+0xe0/0x120 [ 47.840520] [] ? memcpy+0x45/0x50 [ 47.845592] [] relay_open+0x472/0x760 [ 47.851012] [] do_blk_trace_setup+0x3e9/0x950 [ 47.857125] [] blk_trace_setup+0xcf/0x170 [ 47.862893] [] ? do_blk_trace_setup+0x950/0x950 [ 47.869192] [] ? disk_name+0xc7/0x140 [ 47.874614] [] blk_trace_ioctl+0x1de/0x300 [ 47.880467] [] ? compat_blk_trace_setup+0x230/0x230 [ 47.887107] [] ? SyS_open+0x2d/0x40 [ 47.892368] [] ? avc_ss_reset+0x110/0x110 [ 47.898136] [] blkdev_ioctl+0xa97/0x1990 [ 47.903816] [] ? blkpg_ioctl+0x910/0x910 [ 47.909495] [] ? __lru_cache_add+0x164/0x240 [ 47.915521] [] ? do_huge_pmd_anonymous_page+0x549/0xa10 [ 47.922515] [] ? _raw_spin_unlock+0x2c/0x50 [ 47.928454] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 47.935436] [] block_ioctl+0xde/0x120 [ 47.940856] [] ? blkdev_read_iter+0x170/0x170 [ 47.946972] [] do_vfs_ioctl+0x7aa/0xee0 [ 47.952565] [] ? ioctl_preallocate+0x1f0/0x1f0 [ 47.958764] [] ? __do_page_fault+0x290/0xa00 [ 47.964804] [] ? __do_page_fault+0x380/0xa00 [ 47.964810] [] ? security_file_ioctl+0x89/0xb0 [ 47.964813] [] SyS_ioctl+0x8f/0xc0 [ 47.964818] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 47.971287] Dumping ftrace buffer: [ 47.971291] (ftrace buffer empty) [ 47.971293] Kernel Offset: disabled [ 47.999980] Rebooting in 86400 seconds..