[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 10.046550] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.860459] random: sshd: uninitialized urandom read (32 bytes read) [ 23.880368] random: crng init done Warning: Permanently added '10.128.1.10' (ECDSA) to the list of known hosts. executing program [ 30.645720] ------------[ cut here ]------------ [ 30.650553] WARNING: CPU: 1 PID: 2048 at mm/page_alloc.c:3556 __alloc_pages_nodemask+0x13a0/0x1bd0 [ 30.660007] Kernel panic - not syncing: panic_on_warn set ... [ 30.660007] [ 30.667393] CPU: 1 PID: 2048 Comm: syz-executor607 Not tainted 4.9.141+ #1 [ 30.674406] ffff8801cf29ef90 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff [ 30.682424] ffffffff82a96600 0000000000000001 0000000000000009 ffff8801cf29f050 [ 30.690805] ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 [ 30.698820] Call Trace: [ 30.701402] [] dump_stack+0xc1/0x128 [ 30.706772] [] panic+0x1bf/0x39f [ 30.712300] [] ? add_taint.cold.5+0x16/0x16 [ 30.718309] [] ? __warn.cold.8+0x14/0x2f [ 30.724029] [] ? __alloc_pages_nodemask+0x13a0/0x1bd0 [ 30.731022] [] __warn.cold.8+0x2f/0x2f [ 30.742491] [] warn_slowpath_null+0x2c/0x40 [ 30.748535] [] __alloc_pages_nodemask+0x13a0/0x1bd0 [ 30.755220] [] ? kasan_kmalloc.part.1+0xc9/0xf0 [ 30.761571] [] ? kasan_kmalloc.part.1+0x62/0xf0 [ 30.768227] [] ? kmem_cache_alloc_trace+0x117/0x2e0 [ 30.775017] [] ? type_read+0xcf/0x410 [ 30.780472] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 30.787138] [] ? vfs_write+0x187/0x520 [ 30.792673] [] ? SyS_write+0xd9/0x1c0 [ 30.798121] [] ? do_syscall_64+0x19f/0x550 [ 30.804085] [] ? entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 30.811267] [] ? quarantine_put+0xd9/0x180 [ 30.817155] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.824069] [] ? trace_hardirqs_on+0xd/0x10 [ 30.830045] [] ? policydb_read+0x85e/0x2390 [ 30.836014] [] ? kasan_slab_free+0x119/0x190 [ 30.842067] [] ? save_stack_trace+0x16/0x20 [ 30.848066] [] ? kasan_slab_free+0xac/0x190 [ 30.854039] [] ? kfree+0xfb/0x310 [ 30.859174] [] ? policydb_read+0x85e/0x2390 [ 30.865140] [] ? security_load_policy+0x264/0x9b0 [ 30.871630] [] ? sel_write_load+0x19b/0xfa0 [ 30.877601] [] ? vfs_write+0x187/0x520 [ 30.883128] [] kmalloc_order+0x2a/0x70 [ 30.888704] [] kmalloc_order_trace+0x1f/0x190 [ 30.894847] [] __kmalloc+0x1ae/0x310 [ 30.900308] [] str_read+0x39/0x150 [ 30.905488] [] type_read+0x230/0x410 [ 30.910895] [] ? sens_read+0x360/0x360 [ 30.916471] [] ? debug_object_activate+0x4e0/0x4e0 [ 30.923090] [] ? kfree+0xdb/0x310 [ 30.928192] [] ? policydb_read+0x85e/0x2390 [ 30.934157] [] ? sens_read+0x360/0x360 [ 30.939686] [] policydb_read+0xdba/0x2390 [ 30.945478] [] ? unwind_next_frame+0x7d/0xd0 [ 30.951536] [] ? __save_stack_trace+0x7d/0xf0 [ 30.957690] [] ? string_to_av_perm+0x90/0x90 [ 30.963735] [] ? kasan_kmalloc+0xaf/0xc0 [ 30.969548] [] ? kmem_cache_alloc_trace+0x117/0x2e0 [ 30.976213] [] ? check_preemption_disabled+0x3b/0x200 [ 30.983172] [] ? kasan_unpoison_shadow+0x35/0x50 [ 30.989573] [] ? kasan_kmalloc+0xaf/0xc0 [ 30.995338] [] ? kmem_cache_alloc_trace+0x117/0x2e0 [ 31.002007] [] ? security_load_policy+0x137/0x9b0 [ 31.008577] [] security_load_policy+0x264/0x9b0 [ 31.014898] [] ? security_get_bools+0x690/0x690 [ 31.021282] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 31.028222] [] ? __alloc_pages_nodemask+0x11df/0x1bd0 [ 31.035104] [] ? trace_hardirqs_on+0x10/0x10 [ 31.041208] [] ? mark_held_locks+0xc7/0x130 [ 31.047306] [] ? retint_kernel+0x2d/0x2d [ 31.053074] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 31.059959] [] ? check_preemption_disabled+0x3b/0x200 [ 31.066803] [] ? retint_kernel+0x2d/0x2d [ 31.072503] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 31.079245] [] ? lock_acquire+0x173/0x3e0 [ 31.085034] [] ? check_stack_object+0x110/0x150 [ 31.091543] [] ? __check_object_size+0x248/0x38e [ 31.097947] [] sel_write_load+0x19b/0xfa0 [ 31.103740] [] ? trace_hardirqs_on+0xd/0x10 [ 31.109836] [] ? sel_read_bool+0x240/0x240 [ 31.115717] [] ? kasan_slab_free+0xac/0x190 [ 31.121684] [] ? kmem_cache_free+0xbe/0x310 [ 31.127765] [] ? trace_hardirqs_on+0x10/0x10 [ 31.133814] [] __vfs_write+0x115/0x580 [ 31.139419] [] ? sel_read_bool+0x240/0x240 [ 31.145374] [] ? __vfs_read+0x560/0x560 [ 31.150991] [] ? putname+0xdb/0x110 [ 31.156337] [] ? check_preemption_disabled+0x3b/0x200 [ 31.163213] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 31.170056] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 31.176639] [] ? __sb_start_write+0x161/0x300 [ 31.182948] [] vfs_write+0x187/0x520 [ 31.188646] [] SyS_write+0xd9/0x1c0 [ 31.193919] [] ? SyS_read+0x1c0/0x1c0 [ 31.199360] [] ? do_syscall_64+0x48/0x550 [ 31.205151] [] ? SyS_read+0x1c0/0x1c0 [ 31.210592] [] do_syscall_64+0x19f/0x550 [ 31.216435] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 31.223798] Kernel Offset: disabled [ 31.227542] Rebooting in 86400 seconds..