[....] Starting enhanced syslogd: rsyslogd[ 14.242748] audit: type=1400 audit(1536421528.298:4): avc: denied { syslog } for pid=1927 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.195844] ------------[ cut here ]------------ [ 69.200674] WARNING: CPU: 0 PID: 2103 at mm/page_alloc.c:3069 __alloc_pages_nodemask+0x1139/0x1430() [ 69.210089] Kernel panic - not syncing: panic_on_warn set ... [ 69.210089] [ 69.217436] CPU: 0 PID: 2103 Comm: syz-executor789 Not tainted 4.4.154+ #33 [ 69.224744] 0000000000000000 e816f2a169d04a06 ffff8801d396f6b0 ffffffff81a54fed [ 69.232745] ffffffff82835440 ffff8801d5b78000 ffffffff828848e0 0000000000000009 [ 69.240747] 0000000000000bfd ffff8801d396f770 ffffffff8138a884 0000000041b58ab3 [ 69.248801] Call Trace: [ 69.251369] [] dump_stack+0xc1/0x124 [ 69.256711] [] panic+0x19e/0x359 [ 69.261700] [] ? add_taint.cold.4+0x16/0x16 [ 69.267650] [] ? warn_slowpath_common.cold.6+0x5/0x20 [ 69.274466] [] warn_slowpath_common.cold.6+0x20/0x20 [ 69.281198] [] ? __alloc_pages_nodemask+0x1139/0x1430 [ 69.288013] [] warn_slowpath_null+0x29/0x30 [ 69.293954] [] __alloc_pages_nodemask+0x1139/0x1430 [ 69.300596] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 69.307322] [] ? __alloc_pages_direct_compact+0x220/0x220 [ 69.314489] [] ? trace_hardirqs_on+0x10/0x10 [ 69.320530] [] ? mntput_no_expire+0xf8/0x6c0 [ 69.326565] [] ? mnt_get_count+0x170/0x170 [ 69.332424] [] ? dput.part.9+0x16d/0x760 [ 69.338105] [] ? dput.part.9+0x2a/0x760 [ 69.343697] [] ? mntput+0x66/0x90 [ 69.348771] [] ? __lock_acquire+0xa86/0x5ba0 [ 69.354803] [] alloc_kmem_pages+0x12/0x20 [ 69.360574] [] kmalloc_order+0x1f/0x70 [ 69.366083] [] kmalloc_order_trace+0x1f/0x1a0 [ 69.372204] [] ? trace_hardirqs_on+0x10/0x10 [ 69.378240] [] __kmalloc+0x1be/0x330 [ 69.383625] [] vga_arb_write+0xd8/0xcb0 [ 69.389244] [] ? kasan_slab_free+0x119/0x190 [ 69.395389] [] ? vga_str_to_iostate.isra.4+0x130/0x130 [ 69.402294] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 69.409061] [] ? check_preemption_disabled+0x3b/0x170 [ 69.415881] [] ? __fd_install+0x21a/0x600 [ 69.421651] [] ? __fd_install+0x255/0x600 [ 69.427445] [] ? get_unused_fd_flags+0xd0/0xd0 [ 69.433650] [] __vfs_write+0x11c/0x3e0 [ 69.439160] [] ? vga_str_to_iostate.isra.4+0x130/0x130 [ 69.446060] [] ? __vfs_read+0x3d0/0x3d0 [ 69.451660] [] ? f_dupfd+0x12e/0x1d0 [ 69.456999] [] ? avc_policy_seqno+0x9/0x20 [ 69.462869] [] ? selinux_file_permission+0x2f2/0x450 [ 69.469598] [] ? security_file_permission+0x8f/0x1e0 [ 69.476321] [] ? rw_verify_area+0x100/0x2f0 [ 69.482261] [] vfs_write+0x17e/0x4e0 [ 69.487599] [] SyS_write+0xd9/0x1c0 [ 69.492846] [] ? SyS_read+0x1c0/0x1c0 [ 69.498269] [] ? __do_page_fault+0x2b6/0x7e0 [ 69.504299] [] ? do_fast_syscall_32+0xdb/0x8b0 [ 69.510660] [] ? SyS_read+0x1c0/0x1c0 [ 69.516090] [] do_fast_syscall_32+0x31e/0x8b0 [ 69.522210] [] sysenter_flags_fixed+0xd/0x1a [ 69.528526] Dumping ftrace buffer: [ 69.532130] (ftrace buffer empty) [ 69.535822] Kernel Offset: disabled [ 69.539438] Rebooting in 86400 seconds..