[?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. [ 18.363833] audit: type=1400 audit(1518361543.670:6): avc: denied { map } for pid=4177 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.213' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.676447] audit: type=1400 audit(1518361549.982:7): avc: denied { map } for pid=4191 comm="syzkaller953062" path="/root/syzkaller953062677" 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 [ 24.703530] [ 24.705234] ============================= [ 24.709401] WARNING: suspicious RCU usage [ 24.713552] 4.15.0+ #308 Not tainted [ 24.717271] ----------------------------- [ 24.721440] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 24.730715] [ 24.730715] other info that might help us debug this: [ 24.730715] [ 24.738867] [ 24.738867] rcu_scheduler_active = 2, debug_locks = 1 [ 24.745569] 1 lock held by syzkaller953062/4191: [ 24.750324] #0: (rcu_read_lock){....}, at: [<00000000423694b2>] __rds_conn_create+0xe46/0x1b50 [ 24.759286] [ 24.759286] stack backtrace: [ 24.763788] CPU: 1 PID: 4191 Comm: syzkaller953062 Not tainted 4.15.0+ #308 [ 24.770878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.780209] Call Trace: [ 24.782805] dump_stack+0x194/0x257 [ 24.786422] ? arch_local_irq_restore+0x53/0x53 [ 24.791101] lockdep_rcu_suspicious+0x123/0x170 [ 24.795749] ___might_sleep+0x385/0x470 [ 24.799700] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.805558] ? __debug_object_init+0x235/0x1040 [ 24.810205] ? debug_mutex_init+0x1c/0x60 [ 24.814340] __might_sleep+0x95/0x190 [ 24.818125] kmem_cache_alloc_trace+0x299/0x740 [ 24.822773] ? lock_acquire+0x1d5/0x580 [ 24.826722] ? lock_acquire+0x1d5/0x580 [ 24.830675] ? __rds_conn_create+0xe46/0x1b50 [ 24.835164] rds_loop_conn_alloc+0xc8/0x380 [ 24.839468] ? rds_loop_conn_free+0x290/0x290 [ 24.843950] ? __init_waitqueue_head+0x97/0x140 [ 24.848601] ? rcutorture_record_progress+0x10/0x10 [ 24.853596] ? __lockdep_init_map+0xe4/0x650 [ 24.857989] __rds_conn_create+0x112f/0x1b50 [ 24.862397] ? rds_conn_drop+0xb0/0xb0 [ 24.866273] ? __raw_spin_lock_init+0x1c/0x100 [ 24.870834] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.875831] ? __lockdep_init_map+0xe4/0x650 [ 24.880222] ? lockdep_init_map+0x9/0x10 [ 24.884259] ? __init_waitqueue_head+0x97/0x140 [ 24.888905] ? init_wait_entry+0x1b0/0x1b0 [ 24.893133] ? lockdep_init_map+0x9/0x10 [ 24.897175] ? rds_message_alloc+0x28c/0x330 [ 24.901574] ? rds_message_next_extension+0x210/0x210 [ 24.906742] ? trace_hardirqs_on+0xd/0x10 [ 24.911223] ? _raw_spin_unlock_bh+0x30/0x40 [ 24.915617] ? __release_sock+0x360/0x360 [ 24.919738] ? lock_sock_nested+0x91/0x110 [ 24.923956] rds_conn_create_outgoing+0x3f/0x50 [ 24.928605] rds_sendmsg+0xda3/0x2390 [ 24.932381] ? avc_has_perm+0x43e/0x680 [ 24.936345] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.940817] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.945290] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.950289] ? find_held_lock+0x35/0x1d0 [ 24.954336] ? sock_has_perm+0x2a4/0x420 [ 24.958374] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 24.963715] ? lock_release+0xa22/0xa40 [ 24.967665] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.973527] ? __check_object_size+0x8b/0x530 [ 24.978000] ? __handle_mm_fault+0x80e/0x3ce0 [ 24.982485] ? __might_sleep+0x95/0x190 [ 24.986442] ? selinux_socket_sendmsg+0x36/0x40 [ 24.991096] ? security_socket_sendmsg+0x89/0xb0 [ 24.995938] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.000413] sock_sendmsg+0xca/0x110 [ 25.004105] SYSC_sendto+0x361/0x5c0 [ 25.007800] ? SYSC_connect+0x4a0/0x4a0 [ 25.011754] ? __do_page_fault+0x5f7/0xc90 [ 25.015965] ? lock_downgrade+0x980/0x980 [ 25.020097] ? handle_mm_fault+0x43b/0x970 [ 25.024319] ? up_read+0x1a/0x40 [ 25.027664] ? __do_page_fault+0x3d6/0xc90 [ 25.031881] ? mm_fault_error+0x2c0/0x2c0 [ 25.036010] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.041535] SyS_sendto+0x40/0x50 [ 25.044967] ? SyS_getpeername+0x30/0x30 [ 25.049013] do_syscall_64+0x282/0x940 [ 25.052900] ? __do_page_fault+0xc90/0xc90 [ 25.057114] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.062720] ? syscall_return_slowpath+0x550/0x550 [ 25.067635] ? syscall_return_slowpath+0x2ac/0x550 [ 25.072541] ? prepare_exit_to_usermode+0x350/0x350 [ 25.077537] ? retint_user+0x18/0x18 [ 25.081238] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.086091] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 25.091265] RIP: 0033:0x43fd99 [ 25.094431] RSP: 002b:00007fff2a90a268 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 25.102125] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 25.110759] RDX: 0000000000000000 RSI: 0000000020dbf000 RDI: 0000000000000003 [ 25.118013] RBP: 00000000006ca018 R08: 0000000020b2d000 R09: 0000000000000010 [ 25.125265] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004016c0 [ 25.132509] R13: 0000000000401750 R14: 0000000000000000 R15: 0000000000000000 [ 25.139822] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 25.147279] in_atomic(): 1, irqs_disabled(): 0, pid: 4191, name: syzkaller953062 [ 25.154826] 1 lock held by syzkaller953062/4191: [ 25.159585] #0: (rcu_read_lock){....}, at: [<00000000423694b2>] __rds_conn_create+0xe46/0x1b50 [ 25.168554] CPU: 1 PID: 4191 Comm: syzkaller953062 Not tainted 4.15.0+ #308 [ 25.175639] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.184967] Call Trace: [ 25.187538] dump_stack+0x194/0x257 [ 25.191145] ? arch_local_irq_restore+0x53/0x53 [ 25.195794] ? print_lock+0x9f/0xa2 [ 25.199397] ? lockdep_print_held_locks+0xc4/0x130 [ 25.204308] ___might_sleep+0x2b2/0x470 [ 25.208257] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.214115] ? __debug_object_init+0x235/0x1040 [ 25.218771] ? debug_mutex_init+0x1c/0x60 [ 25.222911] __might_sleep+0x95/0x190 [ 25.226694] kmem_cache_alloc_trace+0x299/0x740 [ 25.231345] ? lock_acquire+0x1d5/0x580 [ 25.235299] ? lock_acquire+0x1d5/0x580 [ 25.239251] ? __rds_conn_create+0xe46/0x1b50 [ 25.243747] rds_loop_conn_alloc+0xc8/0x380 [ 25.248071] ? rds_loop_conn_free+0x290/0x290 [ 25.252559] ? __init_waitqueue_head+0x97/0x140 [ 25.257218] ? rcutorture_record_progress+0x10/0x10 [ 25.262216] ? __lockdep_init_map+0xe4/0x650 [ 25.266608] __rds_conn_create+0x112f/0x1b50 [ 25.271015] ? rds_conn_drop+0xb0/0xb0 [ 25.274906] ? __raw_spin_lock_init+0x1c/0x100 [ 25.279488] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.284496] ? __lockdep_init_map+0xe4/0x650 [ 25.288884] ? lockdep_init_map+0x9/0x10 [ 25.292919] ? __init_waitqueue_head+0x97/0x140 [ 25.297566] ? init_wait_entry+0x1b0/0x1b0 [ 25.301785] ? lockdep_init_map+0x9/0x10 [ 25.305838] ? rds_message_alloc+0x28c/0x330 [ 25.310221] ? rds_message_next_extension+0x210/0x210 [ 25.315385] ? trace_hardirqs_on+0xd/0x10 [ 25.319512] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.323899] ? __release_sock+0x360/0x360 [ 25.328025] ? lock_sock_nested+0x91/0x110 [ 25.332250] rds_conn_create_outgoing+0x3f/0x50 [ 25.336906] rds_sendmsg+0xda3/0x2390 [ 25.340684] ? avc_has_perm+0x43e/0x680 [ 25.344650] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.349125] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.353599] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.358597] ? find_held_lock+0x35/0x1d0 [ 25.362646] ? sock_has_perm+0x2a4/0x420 [ 25.366685] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.372036] ? lock_release+0xa22/0xa40 [ 25.375995] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.381865] ? __check_object_size+0x8b/0x530 [ 25.386340] ? __handle_mm_fault+0x80e/0x3ce0 [ 25.390819] ? __might_sleep+0x95/0x190 [ 25.394779] ? selinux_socket_sendmsg+0x36/0x40 [ 25.399432] ? security_socket_sendmsg+0x89/0xb0 [ 25.404170] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.408646] sock_sendmsg+0xca/0x110 [ 25.412429] SYSC_sendto+0x361/0x5c0 [ 25.416123] ? SYSC_connect+0x4a0/0x4a0 [ 25.420085] ? __do_page_fault+0x5f7/0xc90 [ 25.424305] ? lock_downgrade+0x980/0x980 [ 25.428447] ? handle_mm_fault+0x43b/0x970 [ 25.432671] ? up_read+0x1a/0x40 [ 25.436019] ? __do_page_fault+0x3d6/0xc90 [ 25.440244] ? mm_fault_error+0x2c0/0x2c0 [ 25.444371] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.455802] SyS_sendto+0x40/0x50 [ 25.459234] ? SyS_getpeername+0x30/0x30 [ 25.463277] do_syscall_64+0x282/0x940 [ 25.467145] ? __do_page_fault+0xc90/0xc90 [ 25.471382] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.476129] ? syscall_return_slowpath+0x550/0x550 [ 25.481046] ? syscall_return_slowpath+0x2ac/0x550 [ 25.485953] ? prepare_exit_to_usermode+0x350/0x350 [ 25.490951] ? retint_user+0x18/0x18 [ 25.494662] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.499492] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 25.504658] RIP: 0033:0x43fd99 [ 25.507824] RSP: 002b:00007fff2a90a268 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 25.515517] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 25.522765] RDX: 0000000000000000 RSI: 0000000020dbf000 RDI: 0000000000000003 [