[....] Starting enhanced syslogd: rsyslogd[ 16.225490] audit: type=1400 audit(1518405658.400:5): avc: denied { syslog } for pid=4007 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[1G[[32m ok [39;49m8[?25h[?0c.
Starting mcstransd:
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
syzkaller login: [ 18.507148] audit: type=1400 audit(1518405660.681:6): avc: denied { map } for pid=4145 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 '10.128.0.48' (ECDSA) to the list of known hosts.
executing program
[ 24.836496] audit: type=1400 audit(1518405667.011:7): avc: denied { map } for pid=4159 comm="syzkaller234194" path="/root/syzkaller234194614" 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
[ 24.863856]
[ 24.865611] =============================
[ 24.869761] WARNING: suspicious RCU usage
[ 24.873917] 4.16.0-rc1+ #309 Not tainted
[ 24.877985] -----------------------------
[ 24.882157] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section!
[ 24.891420]
[ 24.891420] other info that might help us debug this:
[ 24.891420]
[ 24.899563]
[ 24.899563] rcu_scheduler_active = 2, debug_locks = 1
[ 24.906236] 1 lock held by syzkaller234194/4159:
[ 24.910989] #0: (rcu_read_lock){....}, at: [<00000000859d2dd7>] __rds_conn_create+0xe46/0x1b50
[ 24.919980]
[ 24.919980] stack backtrace:
[ 24.924489] CPU: 0 PID: 4159 Comm: syzkaller234194 Not tainted 4.16.0-rc1+ #309
[ 24.931912] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 24.941237] Call Trace:
[ 24.943798] dump_stack+0x194/0x257
[ 24.947403] ? arch_local_irq_restore+0x53/0x53
[ 24.952062] lockdep_rcu_suspicious+0x123/0x170
[ 24.956708] ___might_sleep+0x385/0x470
[ 24.960654] ? trace_event_raw_event_sched_switch+0x810/0x810
[ 24.966512] ? __debug_object_init+0x235/0x1040
[ 24.971166] ? debug_mutex_init+0x1c/0x60
[ 24.975293] __might_sleep+0x95/0x190
[ 24.979081] kmem_cache_alloc_trace+0x299/0x740
[ 24.983815] ? lock_acquire+0x1d5/0x580
[ 24.987760] ? lock_acquire+0x1d5/0x580
[ 24.991707] ? __rds_conn_create+0xe46/0x1b50
[ 24.996181] rds_loop_conn_alloc+0xc8/0x380
[ 25.000474] ? rds_loop_conn_free+0x290/0x290
[ 25.004945] ? __init_waitqueue_head+0x97/0x140
[ 25.009587] ? rcutorture_record_progress+0x10/0x10
[ 25.014576] ? __lockdep_init_map+0xe4/0x650
[ 25.018962] __rds_conn_create+0x112f/0x1b50
[ 25.023364] ? rds_conn_drop+0xb0/0xb0
[ 25.027227] ? lock_release+0xa40/0xa40
[ 25.031180] ? __raw_spin_lock_init+0x1c/0x100
[ 25.035736] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 25.040729] ? __lockdep_init_map+0xe4/0x650
[ 25.045115] ? lockdep_init_map+0x9/0x10
[ 25.049160] ? __init_waitqueue_head+0x97/0x140
[ 25.053803] ? init_wait_entry+0x1b0/0x1b0
[ 25.058017] ? lockdep_init_map+0x9/0x10
[ 25.062059] ? rds_message_alloc+0x28c/0x330
[ 25.066450] ? rds_message_next_extension+0x210/0x210
[ 25.071611] ? trace_hardirqs_on+0xd/0x10
[ 25.075736] ? _raw_spin_unlock_bh+0x30/0x40
[ 25.080122] ? __release_sock+0x360/0x360
[ 25.084243] ? lock_sock_nested+0x91/0x110
[ 25.088457] rds_conn_create_outgoing+0x3f/0x50
[ 25.093103] rds_sendmsg+0xda3/0x2390
[ 25.096877] ? avc_has_perm+0x43e/0x680
[ 25.100840] ? rds_send_drop_to+0x19d0/0x19d0
[ 25.105310] ? _raw_spin_unlock_irq+0x27/0x70
[ 25.109779] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 25.114781] ? find_held_lock+0x35/0x1d0
[ 25.118826] ? sock_has_perm+0x2a4/0x420
[ 25.122865] ? selinux_secmark_relabel_packet+0xc0/0xc0
[ 25.129157] ? lock_release+0xa22/0xa40
[ 25.133106] ? trace_event_raw_event_sched_switch+0x810/0x810
[ 25.138967] ? __check_object_size+0x8b/0x530
[ 25.143433] ? __handle_mm_fault+0x80e/0x3ce0
[ 25.147905] ? __might_sleep+0x95/0x190
[ 25.151857] ? selinux_socket_sendmsg+0x36/0x40
[ 25.156501] ? security_socket_sendmsg+0x89/0xb0
[ 25.161235] ? rds_send_drop_to+0x19d0/0x19d0
[ 25.165713] sock_sendmsg+0xca/0x110
[ 25.169405] SYSC_sendto+0x361/0x5c0
[ 25.173098] ? SYSC_connect+0x4a0/0x4a0
[ 25.177049] ? __do_page_fault+0x5f7/0xc90
[ 25.181256] ? lock_downgrade+0x980/0x980
[ 25.185405] ? handle_mm_fault+0x43b/0x970
[ 25.189659] ? up_read+0x1a/0x40
[ 25.193027] ? __do_page_fault+0x3d6/0xc90
[ 25.197261] ? mm_fault_error+0x2c0/0x2c0
[ 25.201385] ? trace_event_raw_event_sys_exit+0x260/0x260
[ 25.206899] SyS_sendto+0x40/0x50
[ 25.210327] ? SyS_getpeername+0x30/0x30
[ 25.214360] do_syscall_64+0x282/0x940
[ 25.218218] ? __do_page_fault+0xc90/0xc90
[ 25.222426] ? trace_hardirqs_on_thunk+0x1a/0x1c
[ 25.227155] ? syscall_return_slowpath+0x550/0x550
[ 25.232056] ? syscall_return_slowpath+0x2ac/0x550
[ 25.236974] ? prepare_exit_to_usermode+0x350/0x350
[ 25.241962] ? retint_user+0x18/0x18
[ 25.245655] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 25.250474] entry_SYSCALL_64_after_hwframe+0x26/0x9b
[ 25.255633] RIP: 0033:0x43fd99
[ 25.258795] RSP: 002b:00007ffd5c760f18 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[ 25.266475] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99
[ 25.273717] RDX: 0000000000000000 RSI: 0000000020fc2000 RDI: 0000000000000003
[ 25.280958] RBP: 00000000006ca018 R08: 000000002069affb R09: 0000000000000010
[ 25.288199] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004016c0
[ 25.295439] R13: 0000000000401750 R14: 0000000000000000 R15: 0000000000000000
[ 25.302749] BUG: sleeping function called from invalid context at mm/slab.h:420
[ 25.310203] in_atomic(): 1, irqs_disabled(): 0, pid: 4159, name: syzkaller234194
[ 25.317744] 1 lock held by syzkaller234194/4159:
[ 25.322502] #0: (rcu_read_lock){....}, at: [<00000000859d2dd7>] __rds_conn_create+0xe46/0x1b50
[ 25.331464] CPU: 0 PID: 4159 Comm: syzkaller234194 Not tainted 4.16.0-rc1+ #309
[ 25.338893] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 25.348219] Call Trace:
[ 25.350782] dump_stack+0x194/0x257
[ 25.354385] ? arch_local_irq_restore+0x53/0x53
[ 25.359035] ? print_lock+0x9f/0xa2
[ 25.362635] ? lockdep_print_held_locks+0xc4/0x130
[ 25.367541] ___might_sleep+0x2b2/0x470
[ 25.371487] ? trace_event_raw_event_sched_switch+0x810/0x810
[ 25.377341] ? __debug_object_init+0x235/0x1040
[ 25.381984] ? debug_mutex_init+0x1c/0x60
[ 25.386107] __might_sleep+0x95/0x190
[ 25.389882] kmem_cache_alloc_trace+0x299/0x740
[ 25.394527] ? lock_acquire+0x1d5/0x580
[ 25.398470] ? lock_acquire+0x1d5/0x580
[ 25.402417] ? __rds_conn_create+0xe46/0x1b50
[ 25.406887] rds_loop_conn_alloc+0xc8/0x380
[ 25.411180] ? rds_loop_conn_free+0x290/0x290
[ 25.415650] ? __init_waitqueue_head+0x97/0x140
[ 25.420300] ? rcutorture_record_progress+0x10/0x10
[ 25.425288] ? __lockdep_init_map+0xe4/0x650
[ 25.429675] __rds_conn_create+0x112f/0x1b50
[ 25.434077] ? rds_conn_drop+0xb0/0xb0
[ 25.437937] ? lock_release+0xa40/0xa40
[ 25.441886] ? __raw_spin_lock_init+0x1c/0x100
[ 25.446441] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 25.451435] ? __lockdep_init_map+0xe4/0x650
[ 25.455817] ? lockdep_init_map+0x9/0x10
[ 25.459849] ? __init_waitqueue_head+0x97/0x140
[ 25.464490] ? init_wait_entry+0x1b0/0x1b0
[ 25.468702] ? lockdep_init_map+0x9/0x10
[ 25.472740] ? rds_message_alloc+0x28c/0x330
[ 25.477122] ? rds_message_next_extension+0x210/0x210
[ 25.482281] ? trace_hardirqs_on+0xd/0x10
[ 25.486406] ? _raw_spin_unlock_bh+0x30/0x40
[ 25.490791] ? __release_sock+0x360/0x360
[ 25.494908] ? lock_sock_nested+0x91/0x110
[ 25.499131] rds_conn_create_outgoing+0x3f/0x50
[ 25.503776] rds_sendmsg+0xda3/0x2390
[ 25.507548] ? avc_has_perm+0x43e/0x680
[ 25.511508] ? rds_send_drop_to+0x19d0/0x19d0
[ 25.515974] ? _raw_spin_unlock_irq+0x27/0x70
[ 25.520444] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 25.525438] ? find_held_lock+0x35/0x1d0
[ 25.529492] ? sock_has_perm+0x2a4/0x420
[ 25.533533] ? selinux_secmark_relabel_packet+0xc0/0xc0
[ 25.538867] ? lock_release+0xa22/0xa40
[ 25.542812] ? trace_event_raw_event_sched_switch+0x810/0x810
[ 25.548670] ? __check_object_size+0x8b/0x530
[ 25.553137] ? __handle_mm_fault+0x80e/0x3ce0
[ 25.557611] ? __might_sleep+0x95/0x190
[ 25.561562] ? selinux_socket_sendmsg+0x36/0x40
[ 25.566201] ? security_socket_sendmsg+0x89/0xb0
[ 25.570927] ? rds_send_drop_to+0x19d0/0x19d0
[ 25.575396] sock_sendmsg+0xca/0x110
[ 25.579084] SYSC_sendto+0x361/0x5c0
[ 25.583207] ? SYSC_connect+0x4a0/0x4a0
[ 25.587160] ? __do_page_fault+0x5f7/0xc90
[ 25.591367] ? lock_downgrade+0x980/0x980
[ 25.595496] ? handle_mm_fault+0x43b/0x970
[ 25.599714] ? up_read+0x1a/0x40
[ 25.603058] ? __do_page_fault+0x3d6/0xc90
[ 25.607271] ? mm_fault_error+0x2c0/0x2c0
[ 25.611394] ? trace_event_raw_event_sys_exit+0x260/0x260
[ 25.616905] SyS_sendto+0x40/0x50
[ 25.620332] ? SyS_getpeername+0x30/0x30
[ 25.624365] do_syscall_64+0x282/0x940
[ 25.628229] ? __do_page_fault+0xc90/0xc90
[ 25.632438] ? trace_hardirqs_on_thunk+0x1a/0x1c
[ 25.637171] ? syscall_return_slowpath+0x550/0x550
[ 25.642076] ? syscall_return_slowpath+0x2ac/0x550
[ 25.646977] ? prepare_exit_to_usermode+0x350/0x350
[ 25.651967] ? retint_user+0x18/0x18
[ 25.655656] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 25.660476] entry_SYSCALL_64_after_hwframe+0x26/0x9b
[ 25.665634] RIP: 0033:0x43fd99
[ 25.668798] RSP: 002b:00007ffd5c760f18 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[ 25.676478] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99
[ 25.683720] RDX: 0000000000000000 RSI: 0000000020fc2000 RDI: 000000000