[....] Starting enhanced syslogd: rsyslogd[ 13.678252] audit: type=1400 audit(1536383070.809:4): avc: denied { syslog } for pid=1918 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 '10.128.15.212' (ECDSA) to the list of known hosts. 2018/09/08 05:04:43 parsed 1 programs 2018/09/08 05:04:45 executed programs: 0 syzkaller login: [ 30.459145] ------------[ cut here ]------------ [ 30.463960] WARNING: CPU: 1 PID: 2527 at mm/gup.c:385 __get_user_pages+0xa04/0xea0() [ 30.471934] Kernel panic - not syncing: panic_on_warn set ... [ 30.471934] [ 30.479281] CPU: 1 PID: 2527 Comm: syz-executor0 Not tainted 4.4.154+ #33 [ 30.486181] 0000000000000000 1ee21349527f6219 ffff8800b49af830 ffffffff81a54fed [ 30.494238] ffffffff82835440 ffff8801d1e15f00 ffffffff82892620 0000000000000009 [ 30.502307] 0000000000000181 ffff8800b49af8f0 ffffffff8138a884 0000000041b58ab3 [ 30.510304] Call Trace: [ 30.512956] [] dump_stack+0xc1/0x124 [ 30.518297] [] panic+0x19e/0x359 [ 30.523297] [] ? add_taint.cold.4+0x16/0x16 [ 30.529251] [] ? warn_slowpath_common.cold.6+0x5/0x20 [ 30.536074] [] warn_slowpath_common.cold.6+0x20/0x20 [ 30.542810] [] ? __get_user_pages+0xa04/0xea0 [ 30.548939] [] warn_slowpath_null+0x29/0x30 [ 30.555013] [] __get_user_pages+0xa04/0xea0 [ 30.560961] [] ? follow_page_mask+0x10b0/0x10b0 [ 30.567348] [] get_user_pages+0x8e/0xa0 [ 30.572952] [] __access_remote_vm+0x1e4/0x3c0 [ 30.579073] [] ? do_page_mkwrite+0x350/0x350 [ 30.585103] [] ? get_task_mm+0x20/0xc0 [ 30.590668] [] ? get_task_mm+0x9c/0xc0 [ 30.596195] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.602143] [] access_process_vm+0x58/0x80 [ 30.608004] [] compat_ptrace_request+0x20a/0x430 [ 30.614384] [] ? generic_ptrace_pokedata+0xc0/0xc0 [ 30.620946] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 30.627730] [] ? check_preemption_disabled+0x3b/0x170 [ 30.634557] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 30.641465] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.648339] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 30.655254] [] ? wait_task_inactive+0x34c/0x870 [ 30.661558] [] ? bit_wait_timeout+0x160/0x160 [ 30.667682] [] ? migrate_swap+0x590/0x590 [ 30.673455] [] compat_arch_ptrace+0x443/0x620 [ 30.679577] [] ? arch_ptrace+0x990/0x990 [ 30.685265] [] compat_SyS_ptrace+0x114/0x140 [ 30.691328] [] ? compat_ptrace_request+0x430/0x430 [ 30.697960] [] do_fast_syscall_32+0x31e/0x8b0 [ 30.704092] [] sysenter_flags_fixed+0xd/0x1a [ 30.710442] Dumping ftrace buffer: [ 30.714060] (ftrace buffer empty) [ 30.717754] Kernel Offset: disabled [ 30.721425] Rebooting in 86400 seconds..