[....] Starting enhanced syslogd: rsyslogd[ 15.915928] audit: type=1400 audit(1518393478.585:5): avc: denied { syslog } for pid=4006 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: [ 19.405976] audit: type=1400 audit(1518393482.075:6): 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 '10.128.0.30' (ECDSA) to the list of known hosts. executing program [ 25.733968] audit: type=1400 audit(1518393488.403:7): avc: denied { map } for pid=4160 comm="syzkaller010959" path="/root/syzkaller010959960" 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 [ 25.760932] [ 25.762626] ============================= [ 25.766779] WARNING: suspicious RCU usage [ 25.770935] 4.15.0+ #222 Not tainted [ 25.774652] ----------------------------- [ 25.778815] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 25.788100] [ 25.788100] other info that might help us debug this: [ 25.788100] [ 25.796245] [ 25.796245] rcu_scheduler_active = 2, debug_locks = 1 [ 25.802914] 1 lock held by syzkaller010959/4160: [ 25.807674] #0: (rcu_read_lock){....}, at: [<00000000ee5142bd>] __rds_conn_create+0xe46/0x1b50 [ 25.816618] [ 25.816618] stack backtrace: [ 25.821119] CPU: 0 PID: 4160 Comm: syzkaller010959 Not tainted 4.15.0+ #222 [ 25.828190] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.838130] Call Trace: [ 25.840695] dump_stack+0x194/0x257 [ 25.844301] ? arch_local_irq_restore+0x53/0x53 [ 25.848957] lockdep_rcu_suspicious+0x123/0x170 [ 25.853606] ___might_sleep+0x385/0x470 [ 25.857558] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.863421] ? __debug_object_init+0x235/0x1040 [ 25.868070] ? debug_mutex_init+0x1c/0x60 [ 25.872199] __might_sleep+0x95/0x190 [ 25.875982] kmem_cache_alloc_trace+0x299/0x740 [ 25.880628] ? lock_acquire+0x1d5/0x580 [ 25.884576] ? lock_acquire+0x1d5/0x580 [ 25.888527] ? __rds_conn_create+0xe46/0x1b50 [ 25.893003] rds_loop_conn_alloc+0xc8/0x380 [ 25.897307] ? rds_loop_conn_free+0x290/0x290 [ 25.901776] ? __init_waitqueue_head+0x97/0x140 [ 25.906527] ? rcutorture_record_progress+0x10/0x10 [ 25.911519] ? __lockdep_init_map+0xe4/0x650 [ 25.915906] __rds_conn_create+0x112f/0x1b50 [ 25.920305] ? rds_conn_drop+0xb0/0xb0 [ 25.924176] ? __raw_spin_lock_init+0x1c/0x100 [ 25.928736] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.933734] ? __lockdep_init_map+0xe4/0x650 [ 25.938121] ? lockdep_init_map+0x9/0x10 [ 25.942154] ? __init_waitqueue_head+0x97/0x140 [ 25.946809] ? init_wait_entry+0x1b0/0x1b0 [ 25.951032] ? lockdep_init_map+0x9/0x10 [ 25.955078] ? rds_message_alloc+0x28c/0x330 [ 25.959459] ? rds_message_next_extension+0x210/0x210 [ 25.964621] ? trace_hardirqs_on+0xd/0x10 [ 25.968751] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.973141] ? __release_sock+0x360/0x360 [ 25.977273] ? lock_sock_nested+0x91/0x110 [ 25.981489] rds_conn_create_outgoing+0x3f/0x50 [ 25.986135] rds_sendmsg+0xda3/0x2390 [ 25.989911] ? avc_has_perm+0x43e/0x680 [ 25.993875] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.998349] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.002819] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.007815] ? find_held_lock+0x35/0x1d0 [ 26.011861] ? sock_has_perm+0x2a4/0x420 [ 26.015898] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 26.021247] ? lock_release+0xa02/0xa40 [ 26.025194] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 26.031061] ? __check_object_size+0x8b/0x530 [ 26.035534] ? __handle_mm_fault+0x80e/0x3ce0 [ 26.040012] ? __might_sleep+0x95/0x190 [ 26.043975] ? selinux_socket_sendmsg+0x36/0x40 [ 26.048619] ? security_socket_sendmsg+0x89/0xb0 [ 26.053352] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.057824] sock_sendmsg+0xca/0x110 [ 26.061517] SYSC_sendto+0x361/0x5c0 [ 26.065207] ? SYSC_connect+0x4a0/0x4a0 [ 26.069164] ? __do_page_fault+0x5f7/0xc90 [ 26.073376] ? lock_downgrade+0x980/0x980 [ 26.077506] ? handle_mm_fault+0x43b/0x970 [ 26.081739] ? up_read+0x1a/0x40 [ 26.085084] ? __do_page_fault+0x3d6/0xc90 [ 26.089302] ? mm_fault_error+0x2c0/0x2c0 [ 26.093430] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.098949] SyS_sendto+0x40/0x50 [ 26.102382] ? SyS_getpeername+0x30/0x30 [ 26.106422] do_syscall_64+0x282/0x940 [ 26.110287] ? __do_page_fault+0xc90/0xc90 [ 26.114509] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.119241] ? syscall_return_slowpath+0x550/0x550 [ 26.124145] ? syscall_return_slowpath+0x2ac/0x550 [ 26.129051] ? prepare_exit_to_usermode+0x350/0x350 [ 26.134049] ? retint_user+0x18/0x18 [ 26.137743] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.142568] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 26.147732] RIP: 0033:0x43fd99 [ 26.150905] RSP: 002b:00007ffcc976d228 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 26.158591] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 26.165837] RDX: 0000000000000000 RSI: 0000000020218000 RDI: 0000000000000003 [ 26.173081] RBP: 00000000006ca018 R08: 0000000020af3ff0 R09: 0000000000000010 [ 26.180325] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004016c0 [ 26.187572] R13: 0000000000401750 R14: 0000000000000000 R15: 0000000000000000 [ 26.195101] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 26.202564] in_atomic(): 1, irqs_disabled(): 0, pid: 4160, name: syzkaller010959 [ 26.210100] 1 lock held by syzkaller010959/4160: [ 26.214849] #0: (rcu_read_lock){....}, at: [<00000000ee5142bd>] __rds_conn_create+0xe46/0x1b50 [ 26.223798] CPU: 0 PID: 4160 Comm: syzkaller010959 Not tainted 4.15.0+ #222 [ 26.230892] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.240219] Call Trace: [ 26.242783] dump_stack+0x194/0x257 [ 26.246393] ? arch_local_irq_restore+0x53/0x53 [ 26.251049] ? print_lock+0x9f/0xa2 [ 26.254658] ? lockdep_print_held_locks+0xc4/0x130 [ 26.259566] ___might_sleep+0x2b2/0x470 [ 26.263515] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 26.269372] ? __debug_object_init+0x235/0x1040 [ 26.274025] ? debug_mutex_init+0x1c/0x60 [ 26.278155] __might_sleep+0x95/0x190 [ 26.281938] kmem_cache_alloc_trace+0x299/0x740 [ 26.286582] ? lock_acquire+0x1d5/0x580 [ 26.290529] ? lock_acquire+0x1d5/0x580 [ 26.294476] ? __rds_conn_create+0xe46/0x1b50 [ 26.298956] rds_loop_conn_alloc+0xc8/0x380 [ 26.303253] ? rds_loop_conn_free+0x290/0x290 [ 26.307733] ? __init_waitqueue_head+0x97/0x140 [ 26.312380] ? rcutorture_record_progress+0x10/0x10 [ 26.317374] ? __lockdep_init_map+0xe4/0x650 [ 26.321765] __rds_conn_create+0x112f/0x1b50 [ 26.326169] ? rds_conn_drop+0xb0/0xb0 [ 26.330048] ? __raw_spin_lock_init+0x1c/0x100 [ 26.334605] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.339611] ? __lockdep_init_map+0xe4/0x650 [ 26.343998] ? lockdep_init_map+0x9/0x10 [ 26.348041] ? __init_waitqueue_head+0x97/0x140 [ 26.352688] ? init_wait_entry+0x1b0/0x1b0 [ 26.356903] ? lockdep_init_map+0x9/0x10 [ 26.361046] ? rds_message_alloc+0x28c/0x330 [ 26.365430] ? rds_message_next_extension+0x210/0x210 [ 26.370603] ? trace_hardirqs_on+0xd/0x10 [ 26.374729] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.379128] ? __release_sock+0x360/0x360 [ 26.383246] ? lock_sock_nested+0x91/0x110 [ 26.387459] rds_conn_create_outgoing+0x3f/0x50 [ 26.392105] rds_sendmsg+0xda3/0x2390 [ 26.395880] ? avc_has_perm+0x43e/0x680 [ 26.399845] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.404318] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.408797] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.413793] ? find_held_lock+0x35/0x1d0 [ 26.417837] ? sock_has_perm+0x2a4/0x420 [ 26.421876] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 26.427212] ? lock_release+0xa02/0xa40 [ 26.431160] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 26.437026] ? __check_object_size+0x8b/0x530 [ 26.441500] ? __handle_mm_fault+0x80e/0x3ce0 [ 26.445973] ? __might_sleep+0x95/0x190 [ 26.449936] ? selinux_socket_sendmsg+0x36/0x40 [ 26.454581] ? security_socket_sendmsg+0x89/0xb0 [ 26.459312] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.463791] sock_sendmsg+0xca/0x110 [ 26.467481] SYSC_sendto+0x361/0x5c0 [ 26.471172] ? SYSC_connect+0x4a0/0x4a0 [ 26.475126] ? __do_page_fault+0x5f7/0xc90 [ 26.479341] ? lock_downgrade+0x980/0x980 [ 26.483470] ? handle_mm_fault+0x43b/0x970 [ 26.487690] ? up_read+0x1a/0x40 [ 26.491038] ? __do_page_fault+0x3d6/0xc90 [ 26.495262] ? mm_fault_error+0x2c0/0x2c0 [ 26.499389] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.504918] SyS_sendto+0x40/0x50 [ 26.508347] ? SyS_getpeername+0x30/0x30 [ 26.512386] do_syscall_64+0x282/0x940 [ 26.516247] ? __do_page_fault+0xc90/0xc90 [ 26.520455] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.525187] ? syscall_return_slowpath+0x550/0x550 [ 26.530091] ? syscall_return_slowpath+0x2ac/0x550 [ 26.534993] ? prepare_exit_to_usermode+0x350/0x350 [ 26.539988] ? retint_user+0x18/0x18 [ 26.543681] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.548504] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 26.553669] RIP: 0033:0x43fd99 [ 26.556834] RSP: 002b:00007ffcc976d228 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 26.564519] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 26.571763] RDX: 0000000000000000 RSI: 0000000020218000 RDI: 0000000000000003 [ 26.579024] RBP: 00000000006ca018 R08: 0000000020af3ff0 R09: 0000000000000010 [ 26.586275] R1