[....] Starting enhanced syslogd: rsyslogd[ 13.142168] audit: type=1400 audit(1516643118.146:5): avc: denied { syslog } for pid=3501 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 syzkaller login: [ 19.806971] audit: type=1400 audit(1516643124.810:6): avc: denied { map } for pid=3642 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. [ 31.313643] audit: type=1400 audit(1516643136.317:7): avc: denied { map } for pid=3659 comm="syzkaller301315" path="/root/syzkaller301315329" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 31.641851] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.643948] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.650549] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.651833] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.653241] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.654569] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.657914] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.658616] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.661310] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.662278] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module net-pf-4, throttling... [ 31.769999] [ 31.770005] ====================================================== [ 31.770006] WARNING: possible circular locking dependency detected [ 31.770009] 4.15.0-rc8+ #1 Not tainted [ 31.770010] ------------------------------------------------------ [ 31.770012] syzkaller301315/3887 is trying to acquire lock: [ 31.770014] (event_mutex){+.+.}, at: [<00000000dfa1326b>] ftrace_profile_set_filter+0x7a/0x270 [ 31.770027] [ 31.770027] but task is already holding lock: [ 31.770028] (&cpuctx_mutex){+.+.}, at: [<00000000e276bad6>] perf_event_ctx_lock_nested+0x21b/0x450 [ 31.770037] [ 31.770037] which lock already depends on the new lock. [ 31.770037] [ 31.770038] [ 31.770038] the existing dependency chain (in reverse order) is: [ 31.770039] [ 31.770039] -> #4 (&cpuctx_mutex){+.+.}: [ 31.770049] __mutex_lock+0x16f/0x1a80 [ 31.770052] mutex_lock_nested+0x16/0x20 [ 31.770055] perf_event_init_cpu+0xb6/0x160 [ 31.770061] perf_event_init+0x4e9/0x549 [ 31.770066] start_kernel+0x4cc/0x819 [ 31.770069] x86_64_start_reservations+0x2a/0x2c [ 31.770072] x86_64_start_kernel+0x77/0x7a [ 31.770077] secondary_startup_64+0xa5/0xb0 [ 31.770078] [ 31.770078] -> #3 (pmus_lock){+.+.}: [ 31.770083] __mutex_lock+0x16f/0x1a80 [ 31.770086] mutex_lock_nested+0x16/0x20 [ 31.770089] perf_event_init_cpu+0x2f/0x160 [ 31.770093] cpuhp_invoke_callback+0x2ea/0x1d20 [ 31.770096] _cpu_up+0x216/0x510 [ 31.770098] do_cpu_up+0x73/0xa0 [ 31.770101] cpu_up+0x18/0x20 [ 31.770103] smp_init+0x13a/0x152 [ 31.770106] kernel_init_freeable+0x2fe/0x521 [ 31.770109] kernel_init+0x13/0x180 [ 31.770112] ret_from_fork+0x3a/0x50 [ 31.770113] [ 31.770113] -> #2 (cpu_hotplug_lock.rw_sem){++++}: [ 31.770118] cpus_read_lock+0x42/0x90 [ 31.770123] static_key_slow_inc+0x9d/0x3c0 [ 31.770127] tracepoint_probe_register_prio+0x80d/0x9a0 [ 31.770130] tracepoint_probe_register+0x2a/0x40 [ 31.770134] trace_event_reg+0x167/0x320 [ 31.770137] perf_trace_init+0x4ef/0xab0 [ 31.770140] perf_tp_event_init+0x7d/0xf0 [ 31.770143] perf_try_init_event+0xc9/0x1f0 [ 31.770147] perf_event_alloc+0x1cc6/0x2b00 [ 31.770149] SYSC_perf_event_open+0x84e/0x2e00