[....] Starting enhanced syslogd: rsyslogd[ 13.195587] audit: type=1400 audit(1536362261.294:4): avc: denied { syslog } for pid=1916 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.778077] ------------[ cut here ]------------ [ 34.782862] WARNING: CPU: 1 PID: 2074 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x1139/0x1430() [ 34.793028] Kernel panic - not syncing: panic_on_warn set ... [ 34.793028] [ 34.800378] CPU: 1 PID: 2074 Comm: syz-executor680 Not tainted 4.4.154+ #97 [ 34.807465] 0000000000000000 8d33f1a3822c3b2b ffff8801d4137008 ffffffff81a54fed [ 34.815460] ffffffff82835440 ffff8801d6b7df00 ffffffff828848e0 0000000000000009 [ 34.823485] 0000000000000bfd ffff8801d41370c8 ffffffff8138a884 0000000041b58ab3 [ 34.831533] Call Trace: [ 34.834099] [] dump_stack+0xc1/0x124 [ 34.839444] [] panic+0x19e/0x359 [ 34.844436] [] ? add_taint.cold.4+0x16/0x16 [ 34.850385] [] ? warn_slowpath_common.cold.6+0x5/0x20 [ 34.857204] [] warn_slowpath_common.cold.6+0x20/0x20 [ 34.863933] [] ? __alloc_pages_nodemask+0x1139/0x1430 [ 34.870778] [] warn_slowpath_null+0x29/0x30 [ 34.876731] [] __alloc_pages_nodemask+0x1139/0x1430 [ 34.883374] [] ? kasan_kmalloc.part.1+0xc9/0xf0 [ 34.889670] [] ? save_stack_trace+0x26/0x50 [ 34.895621] [] ? kasan_kmalloc.part.1+0x62/0xf0 [ 34.901912] [] ? kasan_kmalloc+0xaf/0xc0 [ 34.907601] [] ? __kmalloc+0x13d/0x330 [ 34.913111] [] ? hashtab_create+0x120/0x210 [ 34.919058] [] ? policydb_read+0xdb1/0x2360 [ 34.925034] [] ? security_load_policy+0x264/0x9b0 [ 34.931501] [] ? vfs_write+0x17e/0x4e0 [ 34.937048] [] ? SyS_write+0xd9/0x1c0 [ 34.942475] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 34.949637] [] ? common_read+0xad/0x380 [ 34.955236] [] ? policydb_read+0xcd0/0x2360 [ 34.961179] [] ? security_load_policy+0x264/0x9b0 [ 34.967661] [] ? sel_write_load+0x191/0xfc0 [ 34.973604] [] ? __vfs_write+0x11c/0x3e0 [ 34.979285] [] ? vfs_write+0x17e/0x4e0 [ 34.984808] [] ? SyS_write+0xd9/0x1c0 [ 34.990235] [] ? entry_SYSCALL_64_fastpath+0x1e/0x9a [ 34.996963] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 35.003775] [] ? trace_hardirqs_on+0xd/0x10 [ 35.009725] [] ? policydb_read+0x855/0x2360 [ 35.015671] [] ? kasan_slab_free+0x119/0x190 [ 35.021724] [] ? save_stack_trace+0x26/0x50 [ 35.027668] [] ? kfree+0xf4/0x310 [ 35.032786] [] ? check_preemption_disabled+0x3b/0x170 [ 35.039602] [] alloc_kmem_pages+0x12/0x20 [ 35.045377] [] kmalloc_order+0x1f/0x70 [ 35.050889] [] kmalloc_order_trace+0x1f/0x1a0 [ 35.057027] [] __kmalloc+0x1be/0x330 [ 35.062367] [] str_read+0x26/0x130 [ 35.067530] [] common_read+0x265/0x380 [ 35.073045] [] ? class_read+0x940/0x940 [ 35.078644] [] ? ebitmap_destroy+0x100/0x100 [ 35.084698] [] ? class_read+0x940/0x940 [ 35.090300] [] policydb_read+0xdb1/0x2360 [ 35.096091] [] ? dump_trace+0x184/0x360 [ 35.101706] [] ? string_to_av_perm+0x90/0x90 [ 35.107739] [] ? security_load_policy+0x137/0x9b0 [ 35.114205] [] ? check_preemption_disabled+0x3b/0x170 [ 35.121019] [] ? kasan_unpoison_shadow+0x35/0x50 [ 35.127399] [] ? kasan_kmalloc+0xaf/0xc0 [ 35.133086] [] ? kmem_cache_alloc_trace+0x117/0x2d0 [ 35.139726] [] security_load_policy+0x264/0x9b0 [ 35.146021] [] ? security_get_bools+0x690/0x690 [ 35.152316] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 35.159129] [] ? __alloc_pages_nodemask+0x40f/0x1430 [ 35.165855] [] ? trace_hardirqs_on+0x10/0x10 [ 35.171909] [] ? alloc_vmap_area.isra.9+0x4a9/0x830 [ 35.178548] [] ? vmap_page_range_noflush+0x507/0x760 [ 35.185293] [] ? alloc_vmap_area.isra.9+0x830/0x830 [ 35.191935] [] ? kasan_unpoison_shadow+0x35/0x50 [ 35.198329] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 35.205059] [] ? check_stack_object+0x110/0x150 [ 35.211351] [] ? __check_object_size+0x217/0x327 [ 35.217743] [] sel_write_load+0x191/0xfc0 [ 35.223544] [] ? trace_hardirqs_on+0xd/0x10 [ 35.229489] [] ? sel_read_bool+0x240/0x240 [ 35.235451] [] ? kasan_slab_free+0xac/0x190 [ 35.241398] [] ? kmem_cache_free+0xbe/0x340 [ 35.247342] [] ? putname+0xdb/0x110 [ 35.253290] [] ? debug_check_no_obj_freed+0x160/0x890 [ 35.260104] [] ? trace_hardirqs_on+0x10/0x10 [ 35.266138] [] __vfs_write+0x11c/0x3e0 [ 35.271661] [] ? sel_read_bool+0x240/0x240 [ 35.277555] [] ? __vfs_read+0x3d0/0x3d0 [ 35.283166] [] ? check_preemption_disabled+0x3b/0x170 [ 35.289981] [] ? check_preemption_disabled+0x3b/0x170 [ 35.296898] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 35.303709] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 35.310264] [] ? __sb_start_write+0x14f/0x310 [ 35.316385] [] vfs_write+0x17e/0x4e0 [ 35.321732] [] SyS_write+0xd9/0x1c0 [ 35.326991] [] ? SyS_read+0x1c0/0x1c0 [ 35.332413] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 35.338882] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 35.345750] Dumping ftrace buffer: [ 35.350207] (ftrace buffer empty) [ 35.353897] Kernel Offset: disabled [ 35.357517] Rebooting in 86400 seconds..