[....] Starting enhanced syslogd: rsyslogd[ 15.870250] audit: type=1400 audit(1518434817.072:5): avc: denied { syslog } for pid=4008 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: [ 18.742270] audit: type=1400 audit(1518434819.945:6): avc: denied { map } for pid=4146 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 '10.128.0.11' (ECDSA) to the list of known hosts. executing program [ 25.482055] audit: type=1400 audit(1518434826.684:7): avc: denied { map } for pid=4161 comm="syzkaller333964" path="/root/syzkaller333964235" 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 [ 25.508777] [ 25.510576] ============================= [ 25.514741] WARNING: suspicious RCU usage [ 25.518894] 4.16.0-rc1+ #309 Not tainted [ 25.522958] ----------------------------- [ 25.527105] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 25.536372] [ 25.536372] other info that might help us debug this: [ 25.536372] [ 25.544507] [ 25.544507] rcu_scheduler_active = 2, debug_locks = 1 [ 25.551172] 1 lock held by syzkaller333964/4161: [ 25.555919] #0: (rcu_read_lock){....}, at: [<00000000d3b8b399>] __rds_conn_create+0xe46/0x1b50 [ 25.564870] [ 25.564870] stack backtrace: [ 25.569359] CPU: 0 PID: 4161 Comm: syzkaller333964 Not tainted 4.16.0-rc1+ #309 [ 25.576777] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.586104] Call Trace: [ 25.588678] dump_stack+0x194/0x257 [ 25.592285] ? arch_local_irq_restore+0x53/0x53 [ 25.596945] lockdep_rcu_suspicious+0x123/0x170 [ 25.601598] ___might_sleep+0x385/0x470 [ 25.605557] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.611415] ? __debug_object_init+0x235/0x1040 [ 25.616062] ? debug_mutex_init+0x1c/0x60 [ 25.620187] __might_sleep+0x95/0x190 [ 25.623967] kmem_cache_alloc_trace+0x299/0x740 [ 25.628609] ? lock_acquire+0x1d5/0x580 [ 25.632555] ? lock_acquire+0x1d5/0x580 [ 25.636499] ? __rds_conn_create+0xe46/0x1b50 [ 25.640970] rds_loop_conn_alloc+0xc8/0x380 [ 25.645263] ? rds_loop_conn_free+0x290/0x290 [ 25.649737] ? __init_waitqueue_head+0x97/0x140 [ 25.654379] ? rcutorture_record_progress+0x10/0x10 [ 25.659369] ? __lockdep_init_map+0xe4/0x650 [ 25.663752] __rds_conn_create+0x112f/0x1b50 [ 25.668149] ? rds_conn_drop+0xb0/0xb0 [ 25.672015] ? __raw_spin_lock_init+0x1c/0x100 [ 25.676679] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.681677] ? __lockdep_init_map+0xe4/0x650 [ 25.686069] ? lockdep_init_map+0x9/0x10 [ 25.690106] ? __init_waitqueue_head+0x97/0x140 [ 25.694747] ? init_wait_entry+0x1b0/0x1b0 [ 25.698959] ? lockdep_init_map+0x9/0x10 [ 25.702994] ? rds_message_alloc+0x28c/0x330 [ 25.707374] ? rds_message_next_extension+0x210/0x210 [ 25.712536] ? trace_hardirqs_on+0xd/0x10 [ 25.716659] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.721063] ? __release_sock+0x360/0x360 [ 25.725182] ? lock_sock_nested+0x91/0x110 [ 25.729394] rds_conn_create_outgoing+0x3f/0x50 [ 25.734037] rds_sendmsg+0xda3/0x2390 [ 25.737810] ? avc_has_perm+0x43e/0x680 [ 25.741767] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.746234] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.750705] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.755697] ? find_held_lock+0x35/0x1d0 [ 25.759738] ? sock_has_perm+0x2a4/0x420 [ 25.763777] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.769111] ? lock_release+0xa22/0xa40 [ 25.773062] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.778924] ? __check_object_size+0x8b/0x530 [ 25.783388] ? __handle_mm_fault+0x80e/0x3ce0 [ 25.787863] ? __might_sleep+0x95/0x190 [ 25.791813] ? selinux_socket_sendmsg+0x36/0x40 [ 25.796454] ? security_socket_sendmsg+0x89/0xb0 [ 25.801179] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.805649] sock_sendmsg+0xca/0x110 [ 25.809337] SYSC_sendto+0x361/0x5c0 [ 25.813027] ? SYSC_connect+0x4a0/0x4a0 [ 25.816982] ? __do_page_fault+0x5f7/0xc90 [ 25.821190] ? lock_downgrade+0x980/0x980 [ 25.825317] ? handle_mm_fault+0x43b/0x970 [ 25.829537] ? up_read+0x1a/0x40 [ 25.832873] ? __do_page_fault+0x3d6/0xc90 [ 25.837088] ? mm_fault_error+0x2c0/0x2c0 [ 25.841208] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.846721] SyS_sendto+0x40/0x50 [ 25.850152] ? SyS_getpeername+0x30/0x30 [ 25.854190] do_syscall_64+0x282/0x940 [ 25.858051] ? __do_page_fault+0xc90/0xc90 [ 25.862279] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.867007] ? syscall_return_slowpath+0x550/0x550 [ 25.871910] ? syscall_return_slowpath+0x2ac/0x550 [ 25.876811] ? prepare_exit_to_usermode+0x350/0x350 [ 25.881800] ? retint_user+0x18/0x18 [ 25.885491] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.890312] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 25.895471] RIP: 0033:0x43fd99 [ 25.898633] RSP: 002b:00007fff68066f38 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 25.906308] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 25.913548] RDX: 0000000000000000 RSI: 00000000200f7000 RDI: 0000000000000003 [ 25.920791] RBP: 00000000006ca018 R08: 0000000020dfcff0 R09: 0000000000000010 [ 25.928032] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004016c0 [ 25.935276] R13: 0000000000401750 R14: 0000000000000000 R15: 0000000000000000 [ 25.942866] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 25.950323] in_atomic(): 1, irqs_disabled(): 0, pid: 4161, name: syzkaller333964 [ 25.957856] 1 lock held by syzkaller333964/4161: [ 25.962602] #0: (rcu_read_lock){....}, at: [<00000000d3b8b399>] __rds_conn_create+0xe46/0x1b50 [ 25.971546] CPU: 0 PID: 4161 Comm: syzkaller333964 Not tainted 4.16.0-rc1+ #309 [ 25.978963] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.988287] Call Trace: [ 25.990849] dump_stack+0x194/0x257 [ 25.994452] ? arch_local_irq_restore+0x53/0x53 [ 25.999094] ? print_lock+0x9f/0xa2 [ 26.002692] ? lockdep_print_held_locks+0xc4/0x130 [ 26.007598] ___might_sleep+0x2b2/0x470 [ 26.011546] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 26.017408] ? __debug_object_init+0x235/0x1040 [ 26.022057] ? debug_mutex_init+0x1c/0x60 [ 26.026182] __might_sleep+0x95/0x190 [ 26.029961] kmem_cache_alloc_trace+0x299/0x740 [ 26.034606] ? lock_acquire+0x1d5/0x580 [ 26.038551] ? lock_acquire+0x1d5/0x580 [ 26.042498] ? __rds_conn_create+0xe46/0x1b50 [ 26.046969] rds_loop_conn_alloc+0xc8/0x380 [ 26.051266] ? rds_loop_conn_free+0x290/0x290 [ 26.055736] ? __init_waitqueue_head+0x97/0x140 [ 26.060380] ? rcutorture_record_progress+0x10/0x10 [ 26.065370] ? __lockdep_init_map+0xe4/0x650 [ 26.069757] __rds_conn_create+0x112f/0x1b50 [ 26.074157] ? rds_conn_drop+0xb0/0xb0 [ 26.078032] ? __raw_spin_lock_init+0x1c/0x100 [ 26.082601] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.087595] ? __lockdep_init_map+0xe4/0x650 [ 26.091978] ? lockdep_init_map+0x9/0x10 [ 26.096012] ? __init_waitqueue_head+0x97/0x140 [ 26.100671] ? init_wait_entry+0x1b0/0x1b0 [ 26.104883] ? lockdep_init_map+0x9/0x10 [ 26.108930] ? rds_message_alloc+0x28c/0x330 [ 26.113309] ? rds_message_next_extension+0x210/0x210 [ 26.118468] ? trace_hardirqs_on+0xd/0x10 [ 26.122593] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.126991] ? __release_sock+0x360/0x360 [ 26.131111] ? lock_sock_nested+0x91/0x110 [ 26.135323] rds_conn_create_outgoing+0x3f/0x50 [ 26.139967] rds_sendmsg+0xda3/0x2390 [ 26.143737] ? avc_has_perm+0x43e/0x680 [ 26.147700] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.152167] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.156635] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.161624] ? find_held_lock+0x35/0x1d0 [ 26.165667] ? sock_has_perm+0x2a4/0x420 [ 26.169701] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 26.175044] ? lock_release+0xa22/0xa40 [ 26.178989] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 26.184844] ? __check_object_size+0x8b/0x530 [ 26.189316] ? __handle_mm_fault+0x80e/0x3ce0 [ 26.193788] ? __might_sleep+0x95/0x190 [ 26.197739] ? selinux_socket_sendmsg+0x36/0x40 [ 26.202381] ? security_socket_sendmsg+0x89/0xb0 [ 26.207112] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.211586] sock_sendmsg+0xca/0x110 [ 26.215274] SYSC_sendto+0x361/0x5c0 [ 26.218966] ? SYSC_connect+0x4a0/0x4a0 [ 26.222922] ? __do_page_fault+0x5f7/0xc90 [ 26.227131] ? lock_downgrade+0x980/0x980 [ 26.231260] ? handle_mm_fault+0x43b/0x970 [ 26.235481] ? up_read+0x1a/0x40 [ 26.238823] ? __do_page_fault+0x3d6/0xc90 [ 26.243041] ? mm_fault_error+0x2c0/0x2c0 [ 26.247166] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.252685] SyS_sendto+0x40/0x50 [ 26.256115] ? SyS_getpeername+0x30/0x30 [ 26.260153] do_syscall_64+0x282/0x940 [ 26.264021] ? __do_page_fault+0xc90/0xc90 [ 26.268232] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.272968] ? syscall_return_slowpath+0x550/0x550 [ 26.277874] ? syscall_return_slowpath+0x2ac/0x550 [ 26.282777] ? prepare_exit_to_usermode+0x350/0x350 [ 26.287772] ? retint_user+0x18/0x18 [ 26.291466] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.296292] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 26.301454] RIP: 0033:0x43fd99 [ 26.304616] RSP: 002b:00007fff68066f38 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 26.312294] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 26.319537] RDX: 0000000000000000 RSI: 00000000200f7000 RDI: 0000000000000003 [ 26.326782] RBP: 00000000006ca018 R08: 0000000020dfcff0 R09: 0000000000000010 [ 26.334025] R10: 00000