[?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. [ 18.864345] audit: type=1400 audit(1518860642.054:6): avc: denied { map } for pid=4159 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 '10.128.15.216' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.169357] audit: type=1400 audit(1518860648.359:7): avc: denied { map } for pid=4173 comm="syzkaller278581" path="/root/syzkaller278581057" 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 [ 25.196857] [ 25.198553] ============================= [ 25.202745] WARNING: suspicious RCU usage [ 25.206903] 4.16.0-rc1+ #226 Not tainted [ 25.210976] ----------------------------- [ 25.215148] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 25.224423] [ 25.224423] other info that might help us debug this: [ 25.224423] [ 25.232575] [ 25.232575] rcu_scheduler_active = 2, debug_locks = 1 [ 25.239250] 1 lock held by syzkaller278581/4173: [ 25.244040] #0: (rcu_read_lock){....}, at: [<00000000c0797900>] __rds_conn_create+0xe46/0x1b50 [ 25.252997] [ 25.252997] stack backtrace: [ 25.257508] CPU: 1 PID: 4173 Comm: syzkaller278581 Not tainted 4.16.0-rc1+ #226 [ 25.264934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.274260] Call Trace: [ 25.276821] dump_stack+0x194/0x257 [ 25.280425] ? arch_local_irq_restore+0x53/0x53 [ 25.285086] lockdep_rcu_suspicious+0x123/0x170 [ 25.289730] ___might_sleep+0x385/0x470 [ 25.293677] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.299539] ? __debug_object_init+0x235/0x1040 [ 25.304186] ? debug_mutex_init+0x1c/0x60 [ 25.308310] __might_sleep+0x95/0x190 [ 25.312098] kmem_cache_alloc_trace+0x299/0x740 [ 25.316766] ? lock_acquire+0x1d5/0x580 [ 25.320712] ? lock_acquire+0x1d5/0x580 [ 25.324658] ? __rds_conn_create+0xe46/0x1b50 [ 25.329134] rds_loop_conn_alloc+0xc8/0x380 [ 25.333431] ? rds_loop_conn_free+0x290/0x290 [ 25.337908] ? __init_waitqueue_head+0x97/0x140 [ 25.342564] ? rcutorture_record_progress+0x10/0x10 [ 25.347553] ? __lockdep_init_map+0xe4/0x650 [ 25.351946] __rds_conn_create+0x112f/0x1b50 [ 25.356352] ? rds_conn_drop+0xb0/0xb0 [ 25.360255] ? __raw_spin_lock_init+0x1c/0x100 [ 25.364812] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.369804] ? __lockdep_init_map+0xe4/0x650 [ 25.374187] ? lockdep_init_map+0x9/0x10 [ 25.378228] ? __init_waitqueue_head+0x97/0x140 [ 25.382887] ? init_wait_entry+0x1b0/0x1b0 [ 25.387105] ? lockdep_init_map+0x9/0x10 [ 25.391158] ? rds_message_alloc+0x28c/0x330 [ 25.395546] ? rds_message_next_extension+0x210/0x210 [ 25.400717] ? trace_hardirqs_on+0xd/0x10 [ 25.404845] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.409229] ? __release_sock+0x360/0x360 [ 25.413347] ? lock_sock_nested+0x91/0x110 [ 25.417556] rds_conn_create_outgoing+0x3f/0x50 [ 25.422200] rds_sendmsg+0xda3/0x2390 [ 25.425974] ? avc_has_perm+0x43e/0x680 [ 25.429936] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.434412] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.438880] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.443872] ? find_held_lock+0x35/0x1d0 [ 25.447913] ? sock_has_perm+0x2a4/0x420 [ 25.451947] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.457300] ? lock_release+0x9a2/0xa40 [ 25.461445] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.467318] ? __check_object_size+0x8b/0x530 [ 25.471797] ? __might_sleep+0x95/0x190 [ 25.475767] ? selinux_socket_sendmsg+0x36/0x40 [ 25.480418] ? security_socket_sendmsg+0x89/0xb0 [ 25.485179] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.489660] sock_sendmsg+0xca/0x110 [ 25.493352] SYSC_sendto+0x361/0x5c0 [ 25.497044] ? SYSC_connect+0x4a0/0x4a0 [ 25.500996] ? find_held_lock+0x35/0x1d0 [ 25.505041] ? lock_downgrade+0x980/0x980 [ 25.509186] ? up_read+0x1a/0x40 [ 25.512525] ? __do_page_fault+0x3d6/0xc90 [ 25.516743] SyS_sendto+0x40/0x50 [ 25.520173] ? SyS_getpeername+0x30/0x30 [ 25.524213] do_fast_syscall_32+0x3ec/0xf9f [ 25.528516] ? do_int80_syscall_32+0x9c0/0x9c0 [ 25.533073] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.537804] ? syscall_return_slowpath+0x550/0x550 [ 25.542708] ? syscall_return_slowpath+0x2ac/0x550 [ 25.547613] ? prepare_exit_to_usermode+0x350/0x350 [ 25.552606] ? retint_user+0x18/0x18 [ 25.556305] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.561130] entry_SYSENTER_compat+0x70/0x7f [ 25.565510] RIP: 0023:0xf7f85c79 [ 25.568849] RSP: 002b:00000000fffa808c EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 25.576529] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020218000 [ 25.583772] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020062000 [ 25.591016] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 25.598259] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.605514] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.612825] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 25.620324] in_atomic(): 1, irqs_disabled(): 0, pid: 4173, name: syzkaller278581 [ 25.627885] 1 lock held by syzkaller278581/4173: [ 25.632649] #0: (rcu_read_lock){....}, at: [<00000000c0797900>] __rds_conn_create+0xe46/0x1b50 [ 25.641619] CPU: 1 PID: 4173 Comm: syzkaller278581 Not tainted 4.16.0-rc1+ #226 [ 25.649055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.658390] Call Trace: [ 25.660956] dump_stack+0x194/0x257 [ 25.664561] ? arch_local_irq_restore+0x53/0x53 [ 25.669205] ? print_lock+0x9f/0xa2 [ 25.672805] ? lockdep_print_held_locks+0xc4/0x130 [ 25.677714] ___might_sleep+0x2b2/0x470 [ 25.681664] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.687525] ? __debug_object_init+0x235/0x1040 [ 25.692170] ? debug_mutex_init+0x1c/0x60 [ 25.696295] __might_sleep+0x95/0x190 [ 25.700074] kmem_cache_alloc_trace+0x299/0x740 [ 25.704720] ? lock_acquire+0x1d5/0x580 [ 25.708665] ? lock_acquire+0x1d5/0x580 [ 25.712634] ? __rds_conn_create+0xe46/0x1b50 [ 25.717129] rds_loop_conn_alloc+0xc8/0x380 [ 25.721453] ? rds_loop_conn_free+0x290/0x290 [ 25.725940] ? __init_waitqueue_head+0x97/0x140 [ 25.730620] ? rcutorture_record_progress+0x10/0x10 [ 25.735650] ? __lockdep_init_map+0xe4/0x650 [ 25.740052] __rds_conn_create+0x112f/0x1b50 [ 25.744455] ? rds_conn_drop+0xb0/0xb0 [ 25.748327] ? __raw_spin_lock_init+0x1c/0x100 [ 25.752883] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.757877] ? __lockdep_init_map+0xe4/0x650 [ 25.762273] ? lockdep_init_map+0x9/0x10 [ 25.766327] ? __init_waitqueue_head+0x97/0x140 [ 25.770994] ? init_wait_entry+0x1b0/0x1b0 [ 25.775221] ? lockdep_init_map+0x9/0x10 [ 25.779271] ? rds_message_alloc+0x28c/0x330 [ 25.783656] ? rds_message_next_extension+0x210/0x210 [ 25.788823] ? trace_hardirqs_on+0xd/0x10 [ 25.792948] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.797334] ? __release_sock+0x360/0x360 [ 25.801454] ? lock_sock_nested+0x91/0x110 [ 25.805677] rds_conn_create_outgoing+0x3f/0x50 [ 25.810335] rds_sendmsg+0xda3/0x2390 [ 25.814124] ? avc_has_perm+0x43e/0x680 [ 25.818087] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.822554] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.827039] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.832046] ? find_held_lock+0x35/0x1d0 [ 25.836090] ? sock_has_perm+0x2a4/0x420 [ 25.840123] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.845460] ? lock_release+0x9a2/0xa40 [ 25.849405] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.855270] ? __check_object_size+0x8b/0x530 [ 25.859746] ? __might_sleep+0x95/0x190 [ 25.863697] ? selinux_socket_sendmsg+0x36/0x40 [ 25.868339] ? security_socket_sendmsg+0x89/0xb0 [ 25.873070] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.877541] sock_sendmsg+0xca/0x110 [ 25.881228] SYSC_sendto+0x361/0x5c0 [ 25.884920] ? SYSC_connect+0x4a0/0x4a0 [ 25.888868] ? find_held_lock+0x35/0x1d0 [ 25.892913] ? lock_downgrade+0x980/0x980 [ 25.897065] ? up_read+0x1a/0x40 [ 25.900413] ? __do_page_fault+0x3d6/0xc90 [ 25.904637] SyS_sendto+0x40/0x50 [ 25.908073] ? SyS_getpeername+0x30/0x30 [ 25.912118] do_fast_syscall_32+0x3ec/0xf9f [ 25.916427] ? do_int80_syscall_32+0x9c0/0x9c0 [ 25.920989] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.925730] ? syscall_return_slowpath+0x550/0x550 [ 25.930634] ? syscall_return_slowpath+0x2ac/0x550 [ 25.935535] ? prepare_exit_to_usermode+0x350/0x350 [ 25.940525] ? retint_user+0x18/0x18 [ 25.944214] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.949047] entry_SYSENTER_compat+0x70/0x7f [ 25.953439] RIP: 0023:0xf7f85c79 [ 25.956786] RSP: 002b:00000000fffa808c EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 25.964467] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020218000 [ 25.971712]