[....] Starting enhanced syslogd: rsyslogd[ 14.224193] audit: type=1400 audit(1536421392.318:4): avc: denied { syslog } for pid=1920 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.43' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.226229] ------------[ cut here ]------------ [ 34.231089] WARNING: CPU: 0 PID: 2072 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x1139/0x1430() [ 34.241806] Kernel panic - not syncing: panic_on_warn set ... [ 34.241806] [ 34.249161] CPU: 0 PID: 2072 Comm: syz-executor954 Not tainted 4.4.154+ #97 [ 34.256236] 0000000000000000 c8ec66adc4324111 ffff8801d3c9f728 ffffffff81a54fed [ 34.264238] ffffffff82835440 ffff8801d4ed97c0 ffffffff828848e0 0000000000000009 [ 34.272234] 0000000000000bfd ffff8801d3c9f7e8 ffffffff8138a884 0000000041b58ab3 [ 34.280454] Call Trace: [ 34.283021] [] dump_stack+0xc1/0x124 [ 34.288364] [] panic+0x19e/0x359 [ 34.293362] [] ? add_taint.cold.4+0x16/0x16 [ 34.299313] [] ? warn_slowpath_common.cold.6+0x5/0x20 [ 34.306144] [] warn_slowpath_common.cold.6+0x20/0x20 [ 34.312874] [] ? __alloc_pages_nodemask+0x1139/0x1430 [ 34.319794] [] warn_slowpath_null+0x29/0x30 [ 34.325747] [] __alloc_pages_nodemask+0x1139/0x1430 [ 34.332393] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.339225] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 34.346407] [] ? mntput_no_expire+0xcc/0x6c0 [ 34.352444] [] ? mntput_no_expire+0xf8/0x6c0 [ 34.358487] [] ? mnt_get_count+0x170/0x170 [ 34.364349] [] ? dput.part.9+0x16d/0x760 [ 34.370039] [] ? dput.part.9+0x2a/0x760 [ 34.375650] [] ? mntput+0x66/0x90 [ 34.380811] [] ? is_module_text_address+0x2a/0x50 [ 34.387283] [] alloc_kmem_pages+0x12/0x20 [ 34.393060] [] kmalloc_order+0x1f/0x70 [ 34.398571] [] kmalloc_order_trace+0x1f/0x1a0 [ 34.404701] [] __kmalloc+0x1be/0x330 [ 34.410045] [] vga_arb_write+0xd8/0xcb0 [ 34.415645] [] ? vga_str_to_iostate.isra.4+0x130/0x130 [ 34.422618] [] ? trace_hardirqs_on+0x10/0x10 [ 34.428725] [] ? trace_hardirqs_on+0x10/0x10 [ 34.434768] [] ? debug_check_no_obj_freed+0x160/0x890 [ 34.441586] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 34.448492] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 34.455317] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 34.462052] [] __vfs_write+0x11c/0x3e0 [ 34.467567] [] ? vga_str_to_iostate.isra.4+0x130/0x130 [ 34.474466] [] ? __vfs_read+0x3d0/0x3d0 [ 34.480069] [] ? __fd_install+0x255/0x600 [ 34.485847] [] ? get_unused_fd_flags+0xd0/0xd0 [ 34.492055] [] ? avc_policy_seqno+0x9/0x20 [ 34.497915] [] ? selinux_file_permission+0x2f2/0x450 [ 34.504648] [] ? security_file_permission+0x8f/0x1e0 [ 34.511431] [] ? rw_verify_area+0x100/0x2f0 [ 34.517384] [] vfs_write+0x17e/0x4e0 [ 34.522725] [] SyS_write+0xd9/0x1c0 [ 34.527975] [] ? SyS_read+0x1c0/0x1c0 [ 34.533402] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 34.539878] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 34.546887] Dumping ftrace buffer: [ 34.550500] (ftrace buffer empty) [ 34.554191] Kernel Offset: disabled [ 34.557812] Rebooting in 86400 seconds..