[....] Starting enhanced syslogd: rsyslogd[ 14.709903] audit: type=1400 audit(1536423758.306:4): avc: denied { syslog } for pid=1919 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 '10.128.0.63' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 104.842911] ------------[ cut here ]------------ [ 104.847803] WARNING: CPU: 1 PID: 2114 at mm/gup.c:385 __get_user_pages+0xa04/0xea0() [ 104.855743] Kernel panic - not syncing: panic_on_warn set ... [ 104.855743] [ 104.863082] CPU: 1 PID: 2114 Comm: syz-executor246 Not tainted 4.4.154+ #97 [ 104.870155] 0000000000000000 2d9296c0b4aa7ee3 ffff8800b63878f8 ffffffff81a54fed [ 104.878142] ffffffff82835440 ffff8800b72ec740 ffffffff82892620 0000000000000009 [ 104.886122] 0000000000000181 ffff8800b63879b8 ffffffff8138a884 0000000041b58ab3 [ 104.894102] Call Trace: [ 104.896664] [] dump_stack+0xc1/0x124 [ 104.902026] [] panic+0x19e/0x359 [ 104.907016] [] ? add_taint.cold.4+0x16/0x16 [ 104.912965] [] ? ttwu_stat+0x2de/0x490 [ 104.918484] [] ? warn_slowpath_common.cold.6+0x5/0x20 [ 104.925302] [] warn_slowpath_common.cold.6+0x20/0x20 [ 104.932032] [] ? __get_user_pages+0xa04/0xea0 [ 104.938153] [] warn_slowpath_null+0x29/0x30 [ 104.944095] [] __get_user_pages+0xa04/0xea0 [ 104.950090] [] ? follow_page_mask+0x10b0/0x10b0 [ 104.956391] [] get_user_pages+0x8e/0xa0 [ 104.961988] [] __access_remote_vm+0x1e4/0x3c0 [ 104.968113] [] ? do_page_mkwrite+0x350/0x350 [ 104.974146] [] ? get_task_mm+0x20/0xc0 [ 104.979656] [] ? get_task_mm+0x9c/0xc0 [ 104.985167] [] ? _raw_spin_unlock+0x2c/0x50 [ 104.991118] [] access_process_vm+0x58/0x80 [ 104.996990] [] ptrace_request+0x502/0xbc0 [ 105.002762] [] ? generic_ptrace_peekdata+0xf0/0xf0 [ 105.009317] [] ? check_preemption_disabled+0x3b/0x170 [ 105.016271] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 105.023177] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 105.029993] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 105.036898] [] ? wait_task_inactive+0x34c/0x870 [ 105.043190] [] ? migrate_swap+0x590/0x590 [ 105.049084] [] ? mark_held_locks+0xc7/0x130 [ 105.055032] [] ? ptrace_check_attach+0x187/0x380 [ 105.061711] [] ? ptrace_check_attach+0x25e/0x380 [ 105.068106] [] arch_ptrace+0x597/0x990 [ 105.073617] [] SyS_ptrace+0xb1/0x140 [ 105.078967] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 105.085801] Dumping ftrace buffer: [ 105.089421] (ftrace buffer empty) [ 105.093112] Kernel Offset: disabled [ 105.096759] Rebooting in 86400 seconds..