[....] Starting enhanced syslogd: rsyslogd[ 15.859590] audit: type=1400 audit(1518406557.893:5): avc: denied { syslog } for pid=3985 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[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.042184] audit: type=1400 audit(1518406561.075:6): avc: denied { map } for pid=4124 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 '10.128.15.219' (ECDSA) to the list of known hosts. executing program [ 25.307856] audit: type=1400 audit(1518406567.341:7): avc: denied { map } for pid=4138 comm="syzkaller302289" path="/root/syzkaller302289027" 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 [ 25.335057] [ 25.337036] ============================= [ 25.341200] WARNING: suspicious RCU usage [ 25.345370] 4.16.0-rc1+ #219 Not tainted [ 25.349443] ----------------------------- [ 25.353613] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 25.362898] [ 25.362898] other info that might help us debug this: [ 25.362898] [ 25.371062] [ 25.371062] rcu_scheduler_active = 2, debug_locks = 1 [ 25.377742] 1 lock held by syzkaller302289/4138: [ 25.382511] #0: (rcu_read_lock){....}, at: [<000000003cc940dc>] __rds_conn_create+0xe46/0x1b50 [ 25.391476] [ 25.391476] stack backtrace: [ 25.395987] CPU: 0 PID: 4138 Comm: syzkaller302289 Not tainted 4.16.0-rc1+ #219 [ 25.403415] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.412744] Call Trace: [ 25.415314] dump_stack+0x194/0x257 [ 25.418918] ? arch_local_irq_restore+0x53/0x53 [ 25.423579] lockdep_rcu_suspicious+0x123/0x170 [ 25.428231] ___might_sleep+0x385/0x470 [ 25.432185] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.438046] ? __debug_object_init+0x235/0x1040 [ 25.442692] ? debug_mutex_init+0x1c/0x60 [ 25.446822] __might_sleep+0x95/0x190 [ 25.450607] kmem_cache_alloc_trace+0x299/0x740 [ 25.455256] ? lock_acquire+0x1d5/0x580 [ 25.459207] ? lock_acquire+0x1d5/0x580 [ 25.463169] ? __rds_conn_create+0xe46/0x1b50 [ 25.467652] rds_loop_conn_alloc+0xc8/0x380 [ 25.471951] ? rds_loop_conn_free+0x290/0x290 [ 25.476426] ? __init_waitqueue_head+0x97/0x140 [ 25.481074] ? rcutorture_record_progress+0x10/0x10 [ 25.486066] ? __lockdep_init_map+0xe4/0x650 [ 25.490460] __rds_conn_create+0x112f/0x1b50 [ 25.494866] ? rds_conn_drop+0xb0/0xb0 [ 25.498743] ? __raw_spin_lock_init+0x1c/0x100 [ 25.503303] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.508300] ? __lockdep_init_map+0xe4/0x650 [ 25.512690] ? lockdep_init_map+0x9/0x10 [ 25.516728] ? __init_waitqueue_head+0x97/0x140 [ 25.521375] ? init_wait_entry+0x1b0/0x1b0 [ 25.525594] ? lockdep_init_map+0x9/0x10 [ 25.529642] ? rds_message_alloc+0x28c/0x330 [ 25.534025] ? rds_message_next_extension+0x210/0x210 [ 25.539189] ? trace_hardirqs_on+0xd/0x10 [ 25.543320] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.547710] ? __release_sock+0x360/0x360 [ 25.551834] ? lock_sock_nested+0x91/0x110 [ 25.556052] rds_conn_create_outgoing+0x3f/0x50 [ 25.560702] rds_sendmsg+0xda3/0x2390 [ 25.564476] ? avc_has_perm+0x43e/0x680 [ 25.568441] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.572913] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.577385] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.582384] ? find_held_lock+0x35/0x1d0 [ 25.586434] ? sock_has_perm+0x2a4/0x420 [ 25.590475] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.595813] ? lock_release+0xa22/0xa40 [ 25.599766] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.605628] ? __check_object_size+0x8b/0x530 [ 25.610107] ? __might_sleep+0x95/0x190 [ 25.614067] ? selinux_socket_sendmsg+0x36/0x40 [ 25.618715] ? security_socket_sendmsg+0x89/0xb0 [ 25.623447] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.627925] sock_sendmsg+0xca/0x110 [ 25.631621] SYSC_sendto+0x361/0x5c0 [ 25.635332] ? SYSC_connect+0x4a0/0x4a0 [ 25.639287] ? find_held_lock+0x35/0x1d0 [ 25.643338] ? lock_downgrade+0x980/0x980 [ 25.647488] ? up_read+0x1a/0x40 [ 25.650842] ? __do_page_fault+0x3d6/0xc90 [ 25.655079] SyS_sendto+0x40/0x50 [ 25.658521] ? SyS_getpeername+0x30/0x30 [ 25.662572] do_fast_syscall_32+0x3ee/0xfa1 [ 25.666881] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.671445] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.676960] ? syscall_return_slowpath+0x550/0x550 [ 25.681868] ? syscall_return_slowpath+0x2ac/0x550 [ 25.686781] ? retint_user+0x18/0x18 [ 25.690478] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.695308] entry_SYSENTER_compat+0x54/0x63 [ 25.699694] RIP: 0023:0xf7fecc79 [ 25.703039] RSP: 002b:00000000ffa69dfc EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 25.710732] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020218000 [ 25.717978] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020062000 [ 25.725223] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 25.732470] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.739716] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.747263] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 25.754735] in_atomic(): 1, irqs_disabled(): 0, pid: 4138, name: syzkaller302289 [ 25.762314] 1 lock held by syzkaller302289/4138: [ 25.767079] #0: (rcu_read_lock){....}, at: [<000000003cc940dc>] __rds_conn_create+0xe46/0x1b50 [ 25.776058] CPU: 0 PID: 4138 Comm: syzkaller302289 Not tainted 4.16.0-rc1+ #219 [ 25.783488] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.792817] Call Trace: [ 25.795385] dump_stack+0x194/0x257 [ 25.798995] ? arch_local_irq_restore+0x53/0x53 [ 25.803646] ? print_lock+0x9f/0xa2 [ 25.807249] ? lockdep_print_held_locks+0xc4/0x130 [ 25.812160] ___might_sleep+0x2b2/0x470 [ 25.816646] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.822509] ? __debug_object_init+0x235/0x1040 [ 25.827157] ? debug_mutex_init+0x1c/0x60 [ 25.831288] __might_sleep+0x95/0x190 [ 25.835071] kmem_cache_alloc_trace+0x299/0x740 [ 25.839719] ? lock_acquire+0x1d5/0x580 [ 25.843667] ? lock_acquire+0x1d5/0x580 [ 25.847621] ? __rds_conn_create+0xe46/0x1b50 [ 25.852095] rds_loop_conn_alloc+0xc8/0x380 [ 25.856393] ? rds_loop_conn_free+0x290/0x290 [ 25.860864] ? __init_waitqueue_head+0x97/0x140 [ 25.865513] ? rcutorture_record_progress+0x10/0x10 [ 25.870512] ? __lockdep_init_map+0xe4/0x650 [ 25.874906] __rds_conn_create+0x112f/0x1b50 [ 25.879310] ? rds_conn_drop+0xb0/0xb0 [ 25.883182] ? __raw_spin_lock_init+0x1c/0x100 [ 25.887742] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.892740] ? __lockdep_init_map+0xe4/0x650 [ 25.897128] ? lockdep_init_map+0x9/0x10 [ 25.901162] ? __init_waitqueue_head+0x97/0x140 [ 25.905810] ? init_wait_entry+0x1b0/0x1b0 [ 25.910035] ? lockdep_init_map+0x9/0x10 [ 25.914078] ? rds_message_alloc+0x28c/0x330 [ 25.918461] ? rds_message_next_extension+0x210/0x210 [ 25.923625] ? trace_hardirqs_on+0xd/0x10 [ 25.927753] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.932142] ? __release_sock+0x360/0x360 [ 25.936262] ? lock_sock_nested+0x91/0x110 [ 25.940484] rds_conn_create_outgoing+0x3f/0x50 [ 25.945131] rds_sendmsg+0xda3/0x2390 [ 25.948905] ? avc_has_perm+0x43e/0x680 [ 25.952871] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.957343] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.961818] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.966830] ? find_held_lock+0x35/0x1d0 [ 25.970878] ? sock_has_perm+0x2a4/0x420 [ 25.974915] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.980252] ? lock_release+0xa22/0xa40 [ 25.984204] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.990079] ? __check_object_size+0x8b/0x530 [ 25.994557] ? __might_sleep+0x95/0x190 [ 25.998512] ? selinux_socket_sendmsg+0x36/0x40 [ 26.003162] ? security_socket_sendmsg+0x89/0xb0 [ 26.007893] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.012365] sock_sendmsg+0xca/0x110 [ 26.016061] SYSC_sendto+0x361/0x5c0 [ 26.019757] ? SYSC_connect+0x4a0/0x4a0 [ 26.023709] ? find_held_lock+0x35/0x1d0 [ 26.027757] ? lock_downgrade+0x980/0x980 [ 26.031906] ? up_read+0x1a/0x40 [ 26.035251] ? __do_page_fault+0x3d6/0xc90 [ 26.039473] SyS_sendto+0x40/0x50 [ 26.042905] ? SyS_getpeername+0x30/0x30 [ 26.046943] do_fast_syscall_32+0x3ee/0xfa1 [ 26.051245] ? do_int80_syscall_32+0x9d0/0x9d0 [ 26.055803] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.061324] ? syscall_return_slowpath+0x550/0x550 [ 26.066236] ? syscall_return_slowpath+0x2ac/0x550 [ 26.071156] ? retint_user+0x18/0x18 [ 26.074850] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.079676] entry_SYSENTER_compat+0x54/0x63 [ 26.084058] RIP: 0023:0xf7fecc79 [ 26.087395] RSP: 002b:00000000ffa69dfc EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 26.095079] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020218000 [ 26.102325] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020062000 [ 26.109568] RBP: 000