[?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. [ 18.291486] audit: type=1400 audit(1518397214.012:6): avc: denied { map } for pid=4151 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 '10.128.15.194' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.756525] audit: type=1400 audit(1518397220.477:7): avc: denied { map } for pid=4165 comm="syzkaller039792" path="/root/syzkaller039792296" 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 [ 24.783442] [ 24.785142] ============================= [ 24.789299] WARNING: suspicious RCU usage [ 24.793456] 4.16.0-rc1+ #309 Not tainted [ 24.797529] ----------------------------- [ 24.801683] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 24.810960] [ 24.810960] other info that might help us debug this: [ 24.810960] [ 24.819113] [ 24.819113] rcu_scheduler_active = 2, debug_locks = 1 [ 24.825872] 1 lock held by syzkaller039792/4165: [ 24.830630] #0: (rcu_read_lock){....}, at: [<00000000ae98d5f9>] __rds_conn_create+0xe46/0x1b50 [ 24.839580] [ 24.839580] stack backtrace: [ 24.844089] CPU: 1 PID: 4165 Comm: syzkaller039792 Not tainted 4.16.0-rc1+ #309 [ 24.851518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.860840] Call Trace: [ 24.863401] dump_stack+0x194/0x257 [ 24.867004] ? arch_local_irq_restore+0x53/0x53 [ 24.871680] lockdep_rcu_suspicious+0x123/0x170 [ 24.876325] ___might_sleep+0x385/0x470 [ 24.880272] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.886127] ? __debug_object_init+0x235/0x1040 [ 24.890770] ? debug_mutex_init+0x1c/0x60 [ 24.894893] __might_sleep+0x95/0x190 [ 24.898671] kmem_cache_alloc_trace+0x299/0x740 [ 24.903313] ? lock_acquire+0x1d5/0x580 [ 24.907259] ? lock_acquire+0x1d5/0x580 [ 24.911208] ? __rds_conn_create+0xe46/0x1b50 [ 24.915680] rds_loop_conn_alloc+0xc8/0x380 [ 24.919974] ? rds_loop_conn_free+0x290/0x290 [ 24.924445] ? __init_waitqueue_head+0x97/0x140 [ 24.929091] ? rcutorture_record_progress+0x10/0x10 [ 24.934082] ? __lockdep_init_map+0xe4/0x650 [ 24.938468] __rds_conn_create+0x112f/0x1b50 [ 24.942866] ? rds_conn_drop+0xb0/0xb0 [ 24.946739] ? __raw_spin_lock_init+0x1c/0x100 [ 24.951299] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.956295] ? __lockdep_init_map+0xe4/0x650 [ 24.960679] ? lockdep_init_map+0x9/0x10 [ 24.964800] ? __init_waitqueue_head+0x97/0x140 [ 24.969442] ? init_wait_entry+0x1b0/0x1b0 [ 24.973656] ? lockdep_init_map+0x9/0x10 [ 24.977697] ? rds_message_alloc+0x28c/0x330 [ 24.982077] ? rds_message_next_extension+0x210/0x210 [ 24.987238] ? trace_hardirqs_on+0xd/0x10 [ 24.991363] ? _raw_spin_unlock_bh+0x30/0x40 [ 24.995750] ? __release_sock+0x360/0x360 [ 24.999867] ? lock_sock_nested+0x91/0x110 [ 25.004080] rds_conn_create_outgoing+0x3f/0x50 [ 25.008727] rds_sendmsg+0xda3/0x2390 [ 25.012502] ? avc_has_perm+0x43e/0x680 [ 25.016462] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.020931] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.025404] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.030399] ? find_held_lock+0x35/0x1d0 [ 25.034443] ? sock_has_perm+0x2a4/0x420 [ 25.038481] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.043816] ? lock_release+0xa22/0xa40 [ 25.047762] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.053625] ? __check_object_size+0x8b/0x530 [ 25.058092] ? __handle_mm_fault+0x80e/0x3ce0 [ 25.062572] ? __might_sleep+0x95/0x190 [ 25.066525] ? selinux_socket_sendmsg+0x36/0x40 [ 25.071168] ? security_socket_sendmsg+0x89/0xb0 [ 25.075897] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.080368] sock_sendmsg+0xca/0x110 [ 25.084056] SYSC_sendto+0x361/0x5c0 [ 25.087747] ? SYSC_connect+0x4a0/0x4a0 [ 25.091699] ? __do_page_fault+0x5f7/0xc90 [ 25.095908] ? lock_downgrade+0x980/0x980 [ 25.100037] ? handle_mm_fault+0x43b/0x970 [ 25.104256] ? up_read+0x1a/0x40 [ 25.107606] ? __do_page_fault+0x3d6/0xc90 [ 25.111820] ? mm_fault_error+0x2c0/0x2c0 [ 25.115944] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.121474] SyS_sendto+0x40/0x50 [ 25.124919] ? SyS_getpeername+0x30/0x30 [ 25.128977] do_syscall_64+0x282/0x940 [ 25.132852] ? __do_page_fault+0xc90/0xc90 [ 25.137063] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.142576] ? syscall_return_slowpath+0x550/0x550 [ 25.147475] ? syscall_return_slowpath+0x2ac/0x550 [ 25.152383] ? retint_user+0x18/0x18 [ 25.156083] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.160903] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 25.166537] RIP: 0033:0x43fd99 [ 25.169711] RSP: 002b:00007ffc37995928 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 25.177396] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 25.184634] RDX: 0000000000000000 RSI: 0000000020dbf000 RDI: 0000000000000003 [ 25.191875] RBP: 00000000006ca018 R08: 0000000020b2d000 R09: 0000000000000010 [ 25.199116] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004016c0 [ 25.206356] R13: 0000000000401750 R14: 0000000000000000 R15: 0000000000000000 [ 25.213707] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 25.221165] in_atomic(): 1, irqs_disabled(): 0, pid: 4165, name: syzkaller039792 [ 25.228704] 1 lock held by syzkaller039792/4165: [ 25.233464] #0: (rcu_read_lock){....}, at: [<00000000ae98d5f9>] __rds_conn_create+0xe46/0x1b50 [ 25.242422] CPU: 1 PID: 4165 Comm: syzkaller039792 Not tainted 4.16.0-rc1+ #309 [ 25.249846] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.259169] Call Trace: [ 25.261735] dump_stack+0x194/0x257 [ 25.265335] ? arch_local_irq_restore+0x53/0x53 [ 25.269977] ? print_lock+0x9f/0xa2 [ 25.273576] ? lockdep_print_held_locks+0xc4/0x130 [ 25.278481] ___might_sleep+0x2b2/0x470 [ 25.282427] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.288284] ? __debug_object_init+0x235/0x1040 [ 25.292926] ? debug_mutex_init+0x1c/0x60 [ 25.297051] __might_sleep+0x95/0x190 [ 25.300828] kmem_cache_alloc_trace+0x299/0x740 [ 25.305468] ? lock_acquire+0x1d5/0x580 [ 25.309416] ? lock_acquire+0x1d5/0x580 [ 25.313362] ? __rds_conn_create+0xe46/0x1b50 [ 25.317831] rds_loop_conn_alloc+0xc8/0x380 [ 25.322124] ? rds_loop_conn_free+0x290/0x290 [ 25.326590] ? __init_waitqueue_head+0x97/0x140 [ 25.331240] ? rcutorture_record_progress+0x10/0x10 [ 25.336233] ? __lockdep_init_map+0xe4/0x650 [ 25.340618] __rds_conn_create+0x112f/0x1b50 [ 25.345027] ? rds_conn_drop+0xb0/0xb0 [ 25.348909] ? __raw_spin_lock_init+0x1c/0x100 [ 25.353474] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.358466] ? __lockdep_init_map+0xe4/0x650 [ 25.362846] ? lockdep_init_map+0x9/0x10 [ 25.366878] ? __init_waitqueue_head+0x97/0x140 [ 25.371520] ? init_wait_entry+0x1b0/0x1b0 [ 25.375732] ? lockdep_init_map+0x9/0x10 [ 25.379769] ? rds_message_alloc+0x28c/0x330 [ 25.384149] ? rds_message_next_extension+0x210/0x210 [ 25.389306] ? trace_hardirqs_on+0xd/0x10 [ 25.393431] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.397814] ? __release_sock+0x360/0x360 [ 25.401930] ? lock_sock_nested+0x91/0x110 [ 25.406141] rds_conn_create_outgoing+0x3f/0x50 [ 25.410784] rds_sendmsg+0xda3/0x2390 [ 25.414555] ? avc_has_perm+0x43e/0x680 [ 25.418515] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.422980] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.427447] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.432436] ? find_held_lock+0x35/0x1d0 [ 25.436478] ? sock_has_perm+0x2a4/0x420 [ 25.440514] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.445847] ? lock_release+0xa22/0xa40 [ 25.449791] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.455649] ? __check_object_size+0x8b/0x530 [ 25.460116] ? __handle_mm_fault+0x80e/0x3ce0 [ 25.464595] ? __might_sleep+0x95/0x190 [ 25.468547] ? selinux_socket_sendmsg+0x36/0x40 [ 25.473186] ? security_socket_sendmsg+0x89/0xb0 [ 25.477913] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.482383] sock_sendmsg+0xca/0x110 [ 25.486071] SYSC_sendto+0x361/0x5c0 [ 25.489768] ? SYSC_connect+0x4a0/0x4a0 [ 25.493721] ? __do_page_fault+0x5f7/0xc90 [ 25.497943] ? lock_downgrade+0x980/0x980 [ 25.502077] ? handle_mm_fault+0x43b/0x970 [ 25.506297] ? up_read+0x1a/0x40 [ 25.509638] ? __do_page_fault+0x3d6/0xc90 [ 25.513850] ? mm_fault_error+0x2c0/0x2c0 [ 25.517973] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.523493] SyS_sendto+0x40/0x50 [ 25.526918] ? SyS_getpeername+0x30/0x30 [ 25.530954] do_syscall_64+0x282/0x940 [ 25.534811] ? __do_page_fault+0xc90/0xc90 [ 25.539027] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.544547] ? syscall_return_slowpath+0x550/0x550 [ 25.549447] ? syscall_return_slowpath+0x2ac/0x550 [ 25.554353] ? retint_user+0x18/0x18 [ 25.558047] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.562874] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 25.568039] RIP: 0033:0x43fd99 [ 25.571199] RSP: 002b:00007ffc37995928 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 25.578876] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 25.586117] RDX: 0000000000000000 RSI: 0000000020dbf000 RDI: 0000000000000003 [ 25.593359] RBP: 00000000006ca018 R08: 0000000020b2d000 R09: 0000000000000010 [ 25.600598] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004016c0 [ 25.607851] R13: 0000000000