[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 11.409042] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. D[ 12.550415] random: crng init done ebian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 22.768161] ------------[ cut here ]------------ [ 22.769386] WARNING: CPU: 1 PID: 2038 at mm/page_alloc.c:3556 __alloc_pages_nodemask+0x13a0/0x1bd0 [ 22.771097] Kernel panic - not syncing: panic_on_warn set ... [ 22.771097] [ 22.773076] CPU: 1 PID: 2038 Comm: syz-executor680 Not tainted 4.9.141+ #1 [ 22.775049] ffff8801cff7efc8 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff [ 22.777122] ffffffff82a96600 0000000000000001 0000000000000009 ffff8801cff7f088 [ 22.778853] ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 [ 22.780655] Call Trace: [ 22.781560] [] dump_stack+0xc1/0x128 [ 22.782489] [] panic+0x1bf/0x39f [ 22.783310] [] ? add_taint.cold.5+0x16/0x16 [ 22.784596] [] ? __warn.cold.8+0x14/0x2f [ 22.785708] [] ? __alloc_pages_nodemask+0x13a0/0x1bd0 [ 22.786988] [] __warn.cold.8+0x2f/0x2f [ 22.789405] [] warn_slowpath_null+0x2c/0x40 [ 22.795357] [] __alloc_pages_nodemask+0x13a0/0x1bd0 [ 22.802003] [] ? save_stack_trace+0x16/0x20 [ 22.808034] [] ? kasan_kmalloc.part.1+0x62/0xf0 [ 22.814461] [] ? kasan_kmalloc+0xaf/0xc0 [ 22.820178] [] ? __kmalloc+0x12f/0x310 [ 22.825698] [] ? hashtab_create+0x120/0x210 [ 22.831666] [] ? common_read+0x1c5/0x380 [ 22.837354] [] ? policydb_read+0xdba/0x2390 [ 22.843303] [] ? security_load_policy+0x264/0x9b0 [ 22.849774] [] ? sel_write_load+0x19b/0xfa0 [ 22.855743] [] ? __vfs_write+0x115/0x580 [ 22.861439] [] ? vfs_write+0x187/0x520 [ 22.866964] [] ? do_syscall_64+0x19f/0x550 [ 22.872842] [] ? common_read+0xad/0x380 [ 22.878449] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 22.885095] [] ? vfs_write+0x187/0x520 [ 22.890607] [] ? SyS_write+0xd9/0x1c0 [ 22.896297] [] ? do_syscall_64+0x19f/0x550 [ 22.902161] [] ? entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 22.909258] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 22.916109] [] ? trace_hardirqs_on+0xd/0x10 [ 22.922074] [] ? save_stack_trace+0x16/0x20 [ 22.928031] [] ? kfree+0xfb/0x310 [ 22.933116] [] ? policydb_read+0x85e/0x2390 [ 22.939241] [] ? check_preemption_disabled+0x3b/0x200 [ 22.946077] [] kmalloc_order+0x2a/0x70 [ 22.951603] [] kmalloc_order_trace+0x1f/0x190 [ 22.957772] [] __kmalloc+0x1ae/0x310 [ 22.963387] [] ? symcmp+0x30/0x30 [ 22.968480] [] str_read+0x39/0x150 [ 22.973750] [] common_read+0x265/0x380 [ 22.979287] [] ? class_read+0x940/0x940 [ 22.984899] [] ? policydb_read+0x85e/0x2390 [ 22.991003] [] ? kfree+0xfb/0x310 [ 22.996096] [] ? class_read+0x940/0x940 [ 23.001772] [] policydb_read+0xdba/0x2390 [ 23.007571] [] ? unwind_next_frame+0x7d/0xd0 [ 23.013897] [] ? __save_stack_trace+0x7d/0xf0 [ 23.020036] [] ? string_to_av_perm+0x90/0x90 [ 23.026347] [] ? kasan_kmalloc+0xaf/0xc0 [ 23.032083] [] ? kmem_cache_alloc_trace+0x117/0x2e0 [ 23.038737] [] ? check_preemption_disabled+0x3b/0x200 [ 23.045557] [] ? kasan_unpoison_shadow+0x35/0x50 [ 23.051958] [] ? kasan_kmalloc+0xaf/0xc0 [ 23.058179] [] ? kmem_cache_alloc_trace+0x117/0x2e0 [ 23.065880] [] ? security_load_policy+0x137/0x9b0 [ 23.072358] [] security_load_policy+0x264/0x9b0 [ 23.078791] [] ? security_get_bools+0x690/0x690 [ 23.085379] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 23.092530] [] ? __alloc_pages_nodemask+0x11df/0x1bd0 [ 23.099478] [] ? trace_hardirqs_on+0x10/0x10 [ 23.105810] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 23.112485] [] ? vmap_page_range_noflush+0x512/0x770 [ 23.119394] [] ? alloc_vmap_area.isra.8+0x8d0/0x8d0 [ 23.126061] [] ? kasan_unpoison_shadow+0x35/0x50 [ 23.132453] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 23.139417] [] ? check_stack_object+0x110/0x150 [ 23.145821] [] ? __check_object_size+0x248/0x38e [ 23.152307] [] sel_write_load+0x19b/0xfa0 [ 23.158101] [] ? trace_hardirqs_on+0xd/0x10 [ 23.164073] [] ? sel_read_bool+0x240/0x240 [ 23.170045] [] ? trace_hardirqs_on+0x10/0x10 [ 23.176101] [] ? trace_hardirqs_on+0x10/0x10 [ 23.182147] [] __vfs_write+0x115/0x580 [ 23.187684] [] ? sel_read_bool+0x240/0x240 [ 23.193552] [] ? __vfs_read+0x560/0x560 [ 23.199162] [] ? handle_mm_fault+0x54b/0x2350 [ 23.205294] [] ? check_preemption_disabled+0x3b/0x200 [ 23.212178] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 23.219069] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 23.225732] [] ? __sb_start_write+0x161/0x300 [ 23.231926] [] vfs_write+0x187/0x520 [ 23.237424] [] SyS_write+0xd9/0x1c0 [ 23.242876] [] ? SyS_read+0x1c0/0x1c0 [ 23.248374] [] ? do_syscall_64+0x48/0x550 [ 23.254496] [] ? SyS_read+0x1c0/0x1c0 [ 23.260093] [] do_syscall_64+0x19f/0x550 [ 23.265792] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 23.273469] Kernel Offset: disabled [ 23.277393] Rebooting in 86400 seconds..