[....] Starting enhanced syslogd: rsyslogd[ 15.683074] audit: type=1400 audit(1520070930.051:4): avc: denied { syslog } for pid=3651 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.42' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.210611] ------------[ cut here ]------------ [ 26.215426] WARNING: CPU: 0 PID: 3800 at mm/page_alloc.c:3544 __alloc_pages_slowpath+0x1136/0x1d90 [ 26.224527] Kernel panic - not syncing: panic_on_warn set ... [ 26.224527] [ 26.231860] CPU: 0 PID: 3800 Comm: syzkaller396433 Not tainted 4.9.85-ge0b05e6 #57 [ 26.239532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.248855] ffff8801d83ef620 ffffffff81d95739 ffffffff83a480c0 ffff8801d83ef6f8 [ 26.256823] ffffffff83aa5400 ffffffff81452f56 0000000000000009 ffff8801d83ef6e8 [ 26.264811] ffffffff8142f581 0000000041b58ab3 ffffffff8418b1f0 ffffffff8142f3c5 [ 26.272781] Call Trace: [ 26.275341] [] dump_stack+0xc1/0x128 [ 26.280675] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 26.287488] [] panic+0x1bc/0x3a8 [ 26.292474] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 26.300672] [] ? load_image_and_restore+0xf9/0xf9 [ 26.307134] [] ? path_openat+0x5ac/0x2910 [ 26.312903] [] ? do_filp_open+0x197/0x290 [ 26.318680] [] ? do_sys_open+0x366/0x620 [ 26.324361] [] ? __warn+0x1a9/0x1e0 [ 26.329611] [] ? __alloc_pages_slowpath+0x1136/0x1d90 [ 26.336418] [] __warn+0x1c4/0x1e0 [ 26.341499] [] warn_slowpath_null+0x2c/0x40 [ 26.347437] [] __alloc_pages_slowpath+0x1136/0x1d90 [ 26.354073] [] ? __lock_acquire+0x629/0x3640 [ 26.360110] [] ? __lock_acquire+0x629/0x3640 [ 26.360115] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 26.360121] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 26.360125] [] ? get_page_from_freelist+0xcff/0x19f0 [ 26.360136] [] ? __might_sleep+0x95/0x1a0 [ 26.360141] [] __alloc_pages_nodemask+0x33b/0x6b0 [ 26.360145] [] ? __alloc_pages_slowpath+0x1d90/0x1d90 [ 26.360152] [] ? depot_save_stack+0x1c5/0x4a0 [ 26.360157] [] kmalloc_order+0x2a/0x70 [ 26.360161] [] kmalloc_order_trace+0x1f/0x190 [ 26.360167] [] __kmalloc+0x19d/0x310 [ 26.360175] [] vga_arb_write+0xda/0xda0 [ 26.360180] [] ? save_stack_trace+0x16/0x20 [ 26.360183] [] ? vga_get+0x3f0/0x3f0 [ 26.360189] [] ? do_sys_open+0x262/0x620 [ 26.360194] [] ? compat_SyS_openat+0x2d/0x40 [ 26.360200] [] ? do_fast_syscall_32+0x2f5/0x870 [ 26.360208] [] ? entry_SYSENTER_compat+0x90/0xa2 [ 26.360214] [] ? debug_check_no_obj_freed+0x154/0xa10 [ 26.360219] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 26.360223] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 26.360227] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 26.360231] [] ? vga_get+0x3f0/0x3f0 [ 26.360235] [] __vfs_write+0x103/0x680 [ 26.360239] [] ? do_iter_readv_writev+0x4b0/0x4b0 [ 26.360243] [] ? __might_sleep+0x95/0x1a0 [ 26.360250] [] ? __inode_security_revalidate+0xd9/0x130 [ 26.360254] [] ? avc_policy_seqno+0x9/0x20 [ 26.360259] [] ? selinux_file_permission+0x82/0x460 [ 26.360263] [] ? security_file_permission+0x89/0x1e0 [ 26.360267] [] ? rw_verify_area+0xe5/0x2b0 [ 26.360271] [] vfs_write+0x189/0x530 [ 26.360275] [] SyS_write+0xd9/0x1b0 [ 26.360279] [] ? SyS_read+0x1b0/0x1b0 [ 26.360283] [] ? do_fast_syscall_32+0xcf/0x870 [ 26.360287] [] ? SyS_read+0x1b0/0x1b0 [ 26.360290] [] do_fast_syscall_32+0x2f5/0x870 [ 26.360294] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.360298] [] entry_SYSENTER_compat+0x90/0xa2 [ 26.366519] Dumping ftrace buffer: [ 26.366546] (ftrace buffer empty) [ 26.366548] Kernel Offset: disabled [ 26.609993] Rebooting in 86400 seconds..