[....] Starting enhanced syslogd: rsyslogd[ 13.295090] audit: type=1400 audit(1519773207.247:4): avc: denied { syslog } for pid=3644 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 '10.128.0.33' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.611900] ------------[ cut here ]------------ [ 26.616721] WARNING: CPU: 0 PID: 3800 at mm/page_alloc.c:3544 __alloc_pages_slowpath+0x1136/0x1d90 [ 26.625840] Kernel panic - not syncing: panic_on_warn set ... [ 26.625840] [ 26.633180] CPU: 0 PID: 3800 Comm: syzkaller510881 Not tainted 4.9.84-ge7f51a5 #53 [ 26.640854] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.650176] ffff8801d745f668 ffffffff81d956b9 ffffffff83a480c0 ffff8801d745f740 [ 26.658150] ffffffff83aa5400 ffffffff81452f46 0000000000000009 ffff8801d745f730 [ 26.666116] ffffffff8142f571 0000000041b58ab3 ffffffff8418b2c0 ffffffff8142f3b5 [ 26.674080] Call Trace: [ 26.676639] [] dump_stack+0xc1/0x128 [ 26.681974] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 26.688783] [] panic+0x1bc/0x3a8 [ 26.693768] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.701963] [] ? load_image_and_restore+0xf9/0xf9 [ 26.708424] [] ? __warn+0x1a9/0x1e0 [ 26.713670] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 26.720476] [] __warn+0x1c4/0x1e0 [ 26.725547] [] warn_slowpath_null+0x2c/0x40 [ 26.731485] [] __alloc_pages_slowpath+0x1136/0x1d90 [ 26.738128] [] ? mark_held_locks+0xaf/0x100 [ 26.744071] [] ? update_stack_state.constprop.5+0xca/0x150 [ 26.751312] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 26.757948] [] ? get_page_from_freelist+0xcff/0x19f0 [ 26.764669] [] ? __might_sleep+0x95/0x1a0 [ 26.770433] [] __alloc_pages_nodemask+0x33b/0x6b0 [ 26.776901] [] ? __alloc_pages_slowpath+0x1d90/0x1d90 [ 26.783710] [] ? get_page_from_freelist+0xcae/0x19f0 [ 26.790432] [] ? kasan_unpoison_shadow+0x35/0x50 [ 26.796807] [] kmalloc_order+0x2a/0x70 [ 26.802314] [] kmalloc_order_trace+0x1f/0x190 [ 26.808426] [] __kmalloc+0x19d/0x310 [ 26.813757] [] keychord_write+0xce/0xbc0 [ 26.819437] [] ? keychord_read+0x510/0x510 [ 26.825288] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 26.832357] [] ? keychord_read+0x510/0x510 [ 26.838224] [] __vfs_write+0x103/0x680 [ 26.843736] [] ? do_iter_readv_writev+0x400/0x400 [ 26.850203] [] ? __might_sleep+0x95/0x1a0 [ 26.855971] [] ? __inode_security_revalidate+0xd9/0x130 [ 26.862950] [] ? avc_policy_seqno+0x9/0x20 [ 26.868802] [] ? selinux_file_permission+0x82/0x460 [ 26.875435] [] ? security_file_permission+0x89/0x1e0 [ 26.882155] [] ? rw_verify_area+0xe5/0x2b0 [ 26.888008] [] vfs_write+0x189/0x530 [ 26.893338] [] SyS_write+0xd9/0x1b0 [ 26.898582] [] ? SyS_read+0x1b0/0x1b0 [ 26.904007] [] ? do_fast_syscall_32+0xcf/0x870 [ 26.910213] [] ? SyS_read+0x1b0/0x1b0 [ 26.915637] [] do_fast_syscall_32+0x2f5/0x870 [ 26.921749] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.928385] [] entry_SYSENTER_compat+0x90/0xa2 [ 26.935163] Dumping ftrace buffer: [ 26.938756] (ftrace buffer empty) [ 26.942442] Kernel Offset: disabled [ 26.946045] Rebooting in 86400 seconds..