[....] Starting enhanced syslogd: rsyslogd[ 15.855746] audit: type=1400 audit(1519980552.146:5): avc: denied { syslog } for pid=3949 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 syzkaller login: [ 19.158774] audit: type=1400 audit(1519980555.449:6): avc: denied { map } for pid=4088 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 '10.128.0.49' (ECDSA) to the list of known hosts. [ 36.123491] audit: type=1400 audit(1519980572.414:7): avc: denied { map } for pid=4105 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/03/02 08:49:32 parsed 1 programs 2018/03/02 08:49:32 executed programs: 0 [ 36.353784] audit: type=1400 audit(1519980572.644:8): avc: denied { map } for pid=4105 comm="syz-execprog" path="/root/syzkaller-shm091031105" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 36.363454] IPVS: ftp: loaded support on port[0] = 21 [ 36.621716] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 36.953103] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 36.959255] 8021q: adding VLAN 0 to HW filter on device bond0 [ 36.994812] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 37.030327] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 37.043870] TCP: request_sock_TCP: Possible SYN flooding on port 20003. Sending cookies. Check SNMP counters. [ 42.463234] [ 42.464882] ============================================ [ 42.470295] WARNING: possible recursive locking detected [ 42.475710] 4.16.0-rc3+ #245 Not tainted [ 42.479736] -------------------------------------------- [ 42.485151] syz-executor0/4273 is trying to acquire lock: [ 42.490650] (sk_lock-AF_SMC){+.+.}, at: [<00000000e8b7e579>] smc_close_non_accepted+0x1d/0x370 [ 42.499462] [ 42.499462] but task is already holding lock: [ 42.505397] (sk_lock-AF_SMC){+.+.}, at: [<00000000df529233>] smc_close_active+0x8d9/0x11f0 [ 42.513856] [ 42.513856] other info that might help us debug this: [ 42.520488] Possible unsafe locking scenario: [ 42.520488] [ 42.526513] CPU0 [ 42.529060] ---- [ 42.531607] lock(sk_lock-AF_SMC); [ 42.535201] lock(sk_lock-AF_SMC); [ 42.538792] [ 42.538792] *** DEADLOCK *** [ 42.538792] [ 42.544816] May be due to missing lock nesting notation [ 42.544816] [ 42.551709] 1 lock held by syz-executor0/4273: [ 42.556254] #0: (sk_lock-AF_SMC){+.+.}, at: [<00000000df529233>] smc_close_active+0x8d9/0x11f0 [ 42.565150] [ 42.565150] stack backtrace: [ 42.569613] CPU: 0 PID: 4273 Comm: syz-executor0 Not tainted 4.16.0-rc3+ #245 [ 42.576850] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.586171] Call Trace: [ 42.588728] dump_stack+0x194/0x24d [ 42.592323] ? arch_local_irq_restore+0x53/0x53 [ 42.596965] __lock_acquire+0xe8f/0x3e00 [ 42.600997] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 42.606156] ? free_object+0x150/0x230 [ 42.610010] ? lock_release+0xa40/0xa40 [ 42.613953] ? trace_hardirqs_off+0x10/0x10 [ 42.618241] ? trace_hardirqs_off+0x10/0x10 [ 42.622529] ? trace_hardirqs_off+0x10/0x10 [ 42.626816] ? trace_hardirqs_off+0x10/0x10 [ 42.631103] ? smc_accept_dequeue+0x273/0x7c0 [ 42.635566] ? lock_downgrade+0x980/0x980 [ 42.639680] ? find_held_lock+0x35/0x1d0 [ 42.643709] lock_acquire+0x1d5/0x580 [ 42.647479] ? lock_sock_nested+0xa3/0x110 [ 42.651682] ? lock_acquire+0x1d5/0x580 [ 42.655624] ? smc_close_non_accepted+0x1d/0x370 [ 42.660347] ? lock_release+0xa40/0xa40 [ 42.664291] ? check_same_owner+0x320/0x320 [ 42.668581] ? do_raw_spin_trylock+0x190/0x190 [ 42.673128] ? lock_sock_nested+0x44/0x110 [ 42.677331] lock_sock_nested+0xc2/0x110 [ 42.681358] ? smc_close_non_accepted+0x1d/0x370 [ 42.686103] smc_close_non_accepted+0x1d/0x370 [ 42.690651] smc_close_active+0x9aa/0x11f0 [ 42.694855] ? smc_close_wake_tx_prepared+0x90/0x90 [ 42.699839] ? find_held_lock+0x35/0x1d0 [ 42.703867] ? print_irqtrace_events+0x270/0x270 [ 42.708589] ? find_held_lock+0x35/0x1d0 [ 42.712620] ? lock_acquire+0x1d5/0x580 [ 42.716562] ? lock_sock_nested+0xa3/0x110 [ 42.720762] ? lock_acquire+0x1d5/0x580 [ 42.724705] ? smc_release+0x367/0x580 [ 42.728561] ? do_raw_spin_trylock+0x190/0x190 [ 42.733112] ? __local_bh_enable_ip+0x121/0x230 [ 42.737749] ? __init_waitqueue_head+0x140/0x140 [ 42.742472] ? trace_hardirqs_on+0xd/0x10 [ 42.746588] ? __local_bh_enable_ip+0x121/0x230 [ 42.751226] smc_release+0x379/0x580 [ 42.754907] sock_release+0x8d/0x1e0 [ 42.758587] ? sock_alloc_file+0x560/0x560 [ 42.762789] sock_close+0x16/0x20 [ 42.766211] __fput+0x327/0x7e0 [ 42.769459] ? fput+0x140/0x140 [ 42.772706] ? check_same_owner+0x320/0x320 [ 42.776994] ? _raw_spin_unlock_irq+0x27/0x70 [ 42.781457] ____fput+0x15/0x20 [ 42.784705] task_work_run+0x199/0x270 [ 42.788563] ? task_work_cancel+0x210/0x210 [ 42.792850] ? _raw_spin_unlock+0x22/0x30 [ 42.796968] ? switch_task_namespaces+0x87/0xc0 [ 42.801603] do_exit+0x9bb/0x1ad0 [ 42.805028] ? find_held_lock+0x35/0x1d0 [ 42.809056] ? mm_update_next_owner+0x930/0x930 [ 42.813693] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 42.818850] ? lock_downgrade+0x980/0x980 [ 42.822966] ? __unqueue_futex+0x1c0/0x290 [ 42.827169] ? lock_release+0xa40/0xa40 [ 42.831109] ? fault_in_user_writeable+0x90/0x90 [ 42.835831] ? do_raw_spin_trylock+0x190/0x190 [ 42.840381] ? futex_wake+0x680/0x680 [ 42.844152] ? drop_futex_key_refs.isra.13+0x63/0xb0 [ 42.849223] ? futex_wait+0x6a9/0x9a0 [ 42.852992] ? trace_hardirqs_off+0x10/0x10 [ 42.857279] ? drop_futex_key_refs.isra.13+0x63/0xb0 [ 42.862349] ? futex_wake+0x2ca/0x680 [ 42.866117] ? memset+0x31/0x40 [ 42.869366] ? find_held_lock+0x35/0x1d0 [ 42.873394] ? get_signal+0x7a9/0x16d0 [ 42.877253] ? lock_downgrade+0x980/0x980 [ 42.881369] do_group_exit+0x149/0x400 [ 42.885222] ? do_raw_spin_trylock+0x190/0x190 [ 42.889770] ? SyS_exit+0x30/0x30 [ 42.893189] ? _raw_spin_unlock_irq+0x27/0x70 [ 42.897651] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.902633] get_signal+0x73a/0x16d0 [ 42.906313] ? ptrace_notify+0x130/0x130 [ 42.910345] ? fsnotify_first_mark+0x2b0/0x2b0 [ 42.914894] ? rcu_pm_notify+0xc0/0xc0 [ 42.918750] ? compat_writev+0x2af/0x420 [ 42.922780] do_signal+0x90/0x1e90 [ 42.926285] ? compat_writev+0x128/0x420 [ 42.930312] ? __fget_light+0x2b2/0x3c0 [ 42.934254] ? do_pwritev+0x1a0/0x1a0 [ 42.938020] ? setup_sigcontext+0x7d0/0x7d0 [ 42.942308] ? fput+0xd2/0x140 [ 42.945467] ? SYSC_bind+0x290/0x410 [ 42.949152] ? exit_to_usermode_loop+0x8c/0x2f0 [ 42.953790] exit_to_usermode_loop+0x258/0x2f0 [ 42.958340] ? compat_writev+0x420/0x420 [ 42.962368] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 42.967872] ? do_fast_syscall_32+0x156/0xf9f [ 42.972335] do_fast_syscall_32+0xbe6/0xf9f [ 42.976621] ? _raw_spin_unlock_irq+0x27/0x70 [ 42.981084] ? do_int80_syscall_32+0x9c0/0x9c0 [ 42.985631] ? _raw_spin_unlock_irq+0x27/0x70 [ 42.990092] ? finish_task_switch+0x1c1/0x7e0 [ 42.994555] ? syscall_return_slowpath+0x2ac/0x550 [ 42.999450] ? prepare_exit_to_usermode+0x350/0x350 [ 43.004434] ? sysret32_from_system_call+0x5/0x3c [ 43.009248] ? trace_hardirqs_off_thunk+0x1a/0x1c 2018/03/02 08:49:39 executed programs: 1 [ 43.014059] entry