[?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. [ 18.412588] audit: type=1400 audit(1518417671.024:6): avc: denied { map } for pid=4168 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 '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.696381] audit: type=1400 audit(1518417677.308:7): avc: denied { map } for pid=4182 comm="syzkaller626469" path="/root/syzkaller626469643" 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 [ 24.723652] [ 24.725347] ============================= [ 24.729523] WARNING: suspicious RCU usage [ 24.733686] 4.16.0-rc1+ #219 Not tainted [ 24.737755] ----------------------------- [ 24.741926] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 24.751194] [ 24.751194] other info that might help us debug this: [ 24.751194] [ 24.759341] [ 24.759341] rcu_scheduler_active = 2, debug_locks = 1 [ 24.766022] 1 lock held by syzkaller626469/4182: [ 24.770776] #0: (rcu_read_lock){....}, at: [<00000000cc7a1118>] __rds_conn_create+0xe46/0x1b50 [ 24.779725] [ 24.779725] stack backtrace: [ 24.784227] CPU: 1 PID: 4182 Comm: syzkaller626469 Not tainted 4.16.0-rc1+ #219 [ 24.791649] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.800979] Call Trace: [ 24.803543] dump_stack+0x194/0x257 [ 24.807146] ? arch_local_irq_restore+0x53/0x53 [ 24.811798] lockdep_rcu_suspicious+0x123/0x170 [ 24.816442] ___might_sleep+0x385/0x470 [ 24.820387] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.826266] ? __debug_object_init+0x235/0x1040 [ 24.830911] ? debug_mutex_init+0x1c/0x60 [ 24.835039] __might_sleep+0x95/0x190 [ 24.838816] kmem_cache_alloc_trace+0x299/0x740 [ 24.843457] ? lock_acquire+0x1d5/0x580 [ 24.847402] ? lock_acquire+0x1d5/0x580 [ 24.851355] ? __rds_conn_create+0xe46/0x1b50 [ 24.855828] rds_loop_conn_alloc+0xc8/0x380 [ 24.860127] ? rds_loop_conn_free+0x290/0x290 [ 24.864602] ? __init_waitqueue_head+0x97/0x140 [ 24.869247] ? rcutorture_record_progress+0x10/0x10 [ 24.874239] ? __lockdep_init_map+0xe4/0x650 [ 24.878653] __rds_conn_create+0x112f/0x1b50 [ 24.883059] ? rds_conn_drop+0xb0/0xb0 [ 24.886942] ? __raw_spin_lock_init+0x1c/0x100 [ 24.891503] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.896504] ? __lockdep_init_map+0xe4/0x650 [ 24.900896] ? lockdep_init_map+0x9/0x10 [ 24.904935] ? __init_waitqueue_head+0x97/0x140 [ 24.909580] ? init_wait_entry+0x1b0/0x1b0 [ 24.913791] ? lockdep_init_map+0x9/0x10 [ 24.917828] ? rds_message_alloc+0x28c/0x330 [ 24.922221] ? rds_message_next_extension+0x210/0x210 [ 24.927389] ? trace_hardirqs_on+0xd/0x10 [ 24.931517] ? _raw_spin_unlock_bh+0x30/0x40 [ 24.935905] ? __release_sock+0x360/0x360 [ 24.940026] ? lock_sock_nested+0x91/0x110 [ 24.944237] rds_conn_create_outgoing+0x3f/0x50 [ 24.948883] rds_sendmsg+0xda3/0x2390 [ 24.952655] ? avc_has_perm+0x43e/0x680 [ 24.956618] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.961084] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.965555] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.970547] ? find_held_lock+0x35/0x1d0 [ 24.974590] ? sock_has_perm+0x2a4/0x420 [ 24.978625] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 24.983958] ? lock_release+0xa22/0xa40 [ 24.987909] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.993768] ? __check_object_size+0x8b/0x530 [ 24.998245] ? __might_sleep+0x95/0x190 [ 25.002200] ? selinux_socket_sendmsg+0x36/0x40 [ 25.006842] ? security_socket_sendmsg+0x89/0xb0 [ 25.011571] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.016040] sock_sendmsg+0xca/0x110 [ 25.019730] SYSC_sendto+0x361/0x5c0 [ 25.023422] ? SYSC_connect+0x4a0/0x4a0 [ 25.027373] ? find_held_lock+0x35/0x1d0 [ 25.031416] ? lock_downgrade+0x980/0x980 [ 25.035556] ? up_read+0x1a/0x40 [ 25.038897] ? __do_page_fault+0x3d6/0xc90 [ 25.043113] SyS_sendto+0x40/0x50 [ 25.046539] ? SyS_getpeername+0x30/0x30 [ 25.050577] do_fast_syscall_32+0x3ee/0xfa1 [ 25.054876] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.059429] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.064161] ? syscall_return_slowpath+0x550/0x550 [ 25.069063] ? syscall_return_slowpath+0x2ac/0x550 [ 25.073962] ? prepare_exit_to_usermode+0x350/0x350 [ 25.078955] ? retint_user+0x18/0x18 [ 25.082649] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.087477] entry_SYSENTER_compat+0x54/0x63 [ 25.091856] RIP: 0023:0xf7f0bc79 [ 25.095190] RSP: 002b:00000000ffcf7cdc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 25.102869] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020ea8000 [ 25.110109] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020dfcff0 [ 25.117348] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 25.124587] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.131828] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.139134] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 25.146602] in_atomic(): 1, irqs_disabled(): 0, pid: 4182, name: syzkaller626469 [ 25.154166] 1 lock held by syzkaller626469/4182: [ 25.158928] #0: (rcu_read_lock){....}, at: [<00000000cc7a1118>] __rds_conn_create+0xe46/0x1b50 [ 25.167886] CPU: 1 PID: 4182 Comm: syzkaller626469 Not tainted 4.16.0-rc1+ #219 [ 25.175317] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.184650] Call Trace: [ 25.187221] dump_stack+0x194/0x257 [ 25.190823] ? arch_local_irq_restore+0x53/0x53 [ 25.195467] ? print_lock+0x9f/0xa2 [ 25.199064] ? lockdep_print_held_locks+0xc4/0x130 [ 25.203971] ___might_sleep+0x2b2/0x470 [ 25.207916] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.213769] ? __debug_object_init+0x235/0x1040 [ 25.218409] ? debug_mutex_init+0x1c/0x60 [ 25.222533] __might_sleep+0x95/0x190 [ 25.226311] kmem_cache_alloc_trace+0x299/0x740 [ 25.230951] ? lock_acquire+0x1d5/0x580 [ 25.234897] ? lock_acquire+0x1d5/0x580 [ 25.238846] ? __rds_conn_create+0xe46/0x1b50 [ 25.243315] rds_loop_conn_alloc+0xc8/0x380 [ 25.247609] ? rds_loop_conn_free+0x290/0x290 [ 25.252083] ? __init_waitqueue_head+0x97/0x140 [ 25.256727] ? rcutorture_record_progress+0x10/0x10 [ 25.261715] ? __lockdep_init_map+0xe4/0x650 [ 25.266099] __rds_conn_create+0x112f/0x1b50 [ 25.270496] ? rds_conn_drop+0xb0/0xb0 [ 25.274869] ? __raw_spin_lock_init+0x1c/0x100 [ 25.279428] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.284438] ? __lockdep_init_map+0xe4/0x650 [ 25.288833] ? lockdep_init_map+0x9/0x10 [ 25.292865] ? __init_waitqueue_head+0x97/0x140 [ 25.297505] ? init_wait_entry+0x1b0/0x1b0 [ 25.301721] ? lockdep_init_map+0x9/0x10 [ 25.305757] ? rds_message_alloc+0x28c/0x330 [ 25.310139] ? rds_message_next_extension+0x210/0x210 [ 25.315301] ? trace_hardirqs_on+0xd/0x10 [ 25.319433] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.323817] ? __release_sock+0x360/0x360 [ 25.327936] ? lock_sock_nested+0x91/0x110 [ 25.332152] rds_conn_create_outgoing+0x3f/0x50 [ 25.336796] rds_sendmsg+0xda3/0x2390 [ 25.340569] ? avc_has_perm+0x43e/0x680 [ 25.344528] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.348995] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.353469] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.358462] ? find_held_lock+0x35/0x1d0 [ 25.362504] ? sock_has_perm+0x2a4/0x420 [ 25.366545] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.371882] ? lock_release+0xa22/0xa40 [ 25.375832] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.381696] ? __check_object_size+0x8b/0x530 [ 25.386172] ? __might_sleep+0x95/0x190 [ 25.390127] ? selinux_socket_sendmsg+0x36/0x40 [ 25.394776] ? security_socket_sendmsg+0x89/0xb0 [ 25.399510] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.403986] sock_sendmsg+0xca/0x110 [ 25.407678] SYSC_sendto+0x361/0x5c0 [ 25.411370] ? SYSC_connect+0x4a0/0x4a0 [ 25.415320] ? find_held_lock+0x35/0x1d0 [ 25.419362] ? lock_downgrade+0x980/0x980 [ 25.423509] ? up_read+0x1a/0x40 [ 25.426852] ? __do_page_fault+0x3d6/0xc90 [ 25.431077] SyS_sendto+0x40/0x50 [ 25.434505] ? SyS_getpeername+0x30/0x30 [ 25.438539] do_fast_syscall_32+0x3ee/0xfa1 [ 25.442841] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.447393] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.452122] ? syscall_return_slowpath+0x550/0x550 [ 25.457032] ? syscall_return_slowpath+0x2ac/0x550 [ 25.461939] ? prepare_exit_to_usermode+0x350/0x350 [ 25.466933] ? retint_user+0x18/0x18 [ 25.470640] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.475479] entry_SYSENTER_compat+0x54/0x63 [ 25.479859] RIP: 0023:0xf7f0bc79 [ 25.483196] RSP: 002b:00000000ffcf7cdc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 25.490879] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020ea8000 [ 25.498119] RDX: 000