[....] Starting enhanced syslogd: rsyslogd[ 15.960534] audit: type=1400 audit(1518421072.167:5): avc: denied { syslog } for pid=4015 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 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. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.205888] audit: type=1400 audit(1518421078.412:6): avc: denied { map } for pid=4156 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 '10.128.15.225' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 35.539792] audit: type=1400 audit(1518421091.746:7): avc: denied { map } for pid=4172 comm="syzkaller302619" path="/root/syzkaller302619911" 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 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 35.804215] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 36.108381] [ 36.110218] ============================= [ 36.114373] WARNING: suspicious RCU usage [ 36.118512] 4.16.0-rc1+ #219 Not tainted [ 36.122573] ----------------------------- [ 36.126725] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 36.135992] [ 36.135992] other info that might help us debug this: [ 36.135992] [ 36.144164] [ 36.144164] rcu_scheduler_active = 2, debug_locks = 1 [ 36.150839] 1 lock held by syzkaller302619/4172: [ 36.155616] #0: (rcu_read_lock){....}, at: [<00000000a559efc6>] __rds_conn_create+0xe46/0x1b50 [ 36.164556] [ 36.164556] stack backtrace: [ 36.169071] CPU: 0 PID: 4172 Comm: syzkaller302619 Not tainted 4.16.0-rc1+ #219 [ 36.176500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.185827] Call Trace: [ 36.188389] dump_stack+0x194/0x257 [ 36.191991] ? arch_local_irq_restore+0x53/0x53 [ 36.196645] lockdep_rcu_suspicious+0x123/0x170 [ 36.201289] ___might_sleep+0x385/0x470 [ 36.205234] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 36.211087] ? __debug_object_init+0x235/0x1040 [ 36.215729] ? debug_mutex_init+0x1c/0x60 [ 36.219856] __might_sleep+0x95/0x190 [ 36.223633] kmem_cache_alloc_trace+0x299/0x740 [ 36.228282] ? lock_acquire+0x1d5/0x580 [ 36.232234] ? lock_acquire+0x1d5/0x580 [ 36.236178] ? __rds_conn_create+0xe46/0x1b50 [ 36.240648] rds_loop_conn_alloc+0xc8/0x380 [ 36.244943] ? rds_loop_conn_free+0x290/0x290 [ 36.249414] ? __init_waitqueue_head+0x97/0x140 [ 36.254085] ? rcutorture_record_progress+0x10/0x10 [ 36.259076] ? __lockdep_init_map+0xe4/0x650 [ 36.263520] __rds_conn_create+0x112f/0x1b50 [ 36.267922] ? rds_conn_drop+0xb0/0xb0 [ 36.271791] ? __raw_spin_lock_init+0x1c/0x100 [ 36.276347] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.282468] ? __lockdep_init_map+0xe4/0x650 [ 36.286852] ? lockdep_init_map+0x9/0x10 [ 36.290884] ? __init_waitqueue_head+0x97/0x140 [ 36.295526] ? init_wait_entry+0x1b0/0x1b0 [ 36.299739] ? lockdep_init_map+0x9/0x10 [ 36.303774] ? rds_message_alloc+0x28c/0x330 [ 36.308156] ? rds_message_next_extension+0x210/0x210 [ 36.313812] ? trace_hardirqs_on+0xd/0x10 [ 36.317949] ? _raw_spin_unlock_bh+0x30/0x40 [ 36.322345] ? __release_sock+0x360/0x360 [ 36.326466] ? lock_sock_nested+0x91/0x110 [ 36.330682] rds_conn_create_outgoing+0x3f/0x50 [ 36.335330] rds_sendmsg+0xda3/0x2390 [ 36.339101] ? avc_has_perm+0x43e/0x680 [ 36.343069] ? rds_send_drop_to+0x19d0/0x19d0 [ 36.347623] ? release_sock+0x1d4/0x2a0 [ 36.351572] ? lock_downgrade+0x980/0x980 [ 36.355696] ? find_held_lock+0x35/0x1d0 [ 36.359737] ? sock_has_perm+0x2a4/0x420 [ 36.363774] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 36.369110] ? lock_release+0xa22/0xa40 [ 36.373055] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 36.378910] ? __check_object_size+0x8b/0x530 [ 36.383378] ? __release_sock+0x360/0x360 [ 36.387507] ? __might_sleep+0x95/0x190 [ 36.391455] ? selinux_socket_sendmsg+0x36/0x40 [ 36.396097] ? security_socket_sendmsg+0x89/0xb0 [ 36.400825] ? rds_send_drop_to+0x19d0/0x19d0 [ 36.405294] sock_sendmsg+0xca/0x110 [ 36.408983] SYSC_sendto+0x361/0x5c0 [ 36.412676] ? SYSC_connect+0x4a0/0x4a0 [ 36.416631] ? security_socket_bind+0x89/0xb0 [ 36.421103] ? SYSC_bind+0x290/0x410 [ 36.424815] ? up_read+0x1a/0x40 [ 36.428157] ? __do_page_fault+0x3d6/0xc90 [ 36.432372] SyS_sendto+0x40/0x50 [ 36.435799] ? SyS_getpeername+0x30/0x30 [ 36.439834] do_fast_syscall_32+0x3ee/0xfa1 [ 36.444136] ? do_int80_syscall_32+0x9d0/0x9d0 [ 36.448690] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.453420] ? syscall_return_slowpath+0x550/0x550 [ 36.458323] ? syscall_return_slowpath+0x2ac/0x550 [ 36.463225] ? prepare_exit_to_usermode+0x350/0x350 [ 36.468215] ? sysret32_from_system_call+0x5/0x3b [ 36.473037] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.477857] entry_SYSENTER_compat+0x54/0x63 [ 36.482238] RIP: 0023:0xf7fd3c79 [ 36.485576] RSP: 002b:00000000fff60ffc EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 36.493255] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020007000 [ 36.500497] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 [ 36.507742] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 36.514990] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 36.522235] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 36.529729] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 36.537187] in_atomic(): 1, irqs_disabled(): 0, pid: 4172, name: syzkaller302619 [ 36.544746] 1 lock held by syzkaller302619/4172: [ 36.549504] #0: (rcu_read_lock){....}, at: [<00000000a559efc6>] __rds_conn_create+0xe46/0x1b50 [ 36.558471] CPU: 0 PID: 4172 Comm: syzkaller302619 Not tainted 4.16.0-rc1+ #219 [ 36.565911] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.575241] Call Trace: [ 36.577808] dump_stack+0x194/0x257 [ 36.581420] ? arch_local_irq_restore+0x53/0x53 [ 36.586069] ? print_lock+0x9f/0xa2 [ 36.589673] ? lockdep_print_held_locks+0xc4/0x130 [ 36.594587] ___might_sleep+0x2b2/0x470 [ 36.598540] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 36.604399] ? __debug_object_init+0x235/0x1040 [ 36.609045] ? debug_mutex_init+0x1c/0x60 [ 36.613172] __might_sleep+0x95/0x190 [ 36.616966] kmem_cache_alloc_trace+0x299/0x740 [ 36.621617] ? lock_acquire+0x1d5/0x580 [ 36.625565] ? lock_acquire+0x1d5/0x580 [ 36.629513] ? __rds_conn_create+0xe46/0x1b50 [ 36.634001] rds_loop_conn_alloc+0xc8/0x380 [ 36.638299] ? rds_loop_conn_free+0x290/0x290 [ 36.642770] ? __init_waitqueue_head+0x97/0x140 [ 36.647417] ? rcutorture_record_progress+0x10/0x10 [ 36.652413] ? __lockdep_init_map+0xe4/0x650 [ 36.656802] __rds_conn_create+0x112f/0x1b50 [ 36.661201] ? rds_conn_drop+0xb0/0xb0 [ 36.665073] ? __raw_spin_lock_init+0x1c/0x100 [ 36.669633] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.674632] ? __lockdep_init_map+0xe4/0x650 [ 36.679021] ? lockdep_init_map+0x9/0x10 [ 36.683069] ? __init_waitqueue_head+0x97/0x140 [ 36.687714] ? init_wait_entry+0x1b0/0x1b0 [ 36.691926] ? lockdep_init_map+0x9/0x10 [ 36.695967] ? rds_message_alloc+0x28c/0x330 [ 36.700360] ? rds_message_next_extension+0x210/0x210 [ 36.705525] ? trace_hardirqs_on+0xd/0x10 [ 36.709654] ? _raw_spin_unlock_bh+0x30/0x40 [ 36.714040] ? __release_sock+0x360/0x360 [ 36.718172] ? lock_sock_nested+0x91/0x110 [ 36.722384] rds_conn_create_outgoing+0x3f/0x50 [ 36.727032] rds_sendmsg+0xda3/0x2390 [ 36.730808] ? avc_has_perm+0x43e/0x680 [ 36.734770] ? rds_send_drop_to+0x19d0/0x19d0 [ 36.739234] ? release_sock+0x1d4/0x2a0 [ 36.743189] ? lock_downgrade+0x980/0x980 [ 36.747316] ? find_held_lock+0x35/0x1d0 [ 36.751369] ? sock_has_perm+0x2a4/0x420 [ 36.755403] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 36.760759] ? lock_release+0xa22/0xa40 [ 36.764704] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 36.770567] ? __check_object_size+0x8b/0x530 [ 36.775037] ? __release_sock+0x360/0x360 [ 36.779169] ? __might_sleep+0x95/0x190 [ 36.783121] ? selinux_socket_sendmsg+0x36/0x40 [ 36.787762] ? security_socket_sendmsg+0x89/0xb0 [ 36.792504] ? rds_send_drop_to+0x19d0/0x19d0 [ 36.796981] sock_sendmsg+0xca/0x110 [ 36.800670] SYSC_sendto+0x361/0x5c0 [ 36.804371] ? SYSC_connect+0x4a0/0x4a0 [ 36.808329] ? security_socket_bind+0x89/0xb0 [ 36.812812] ? SYSC_bind+0x290/0x410 [ 36.816523] ? up_read+0x1a/0x40 [ 36.819861] ? __do_page_fault+0x3d6/0xc90 [ 36.824078] SyS_sendto+0x40/0x50 [ 36.827502] ? SyS_getpeername+0x30/0x30 [ 36.831541] do_fast_syscall_32+0x3ee/0xfa1 [ 36.835840] ? do_int80_syscall_32+0x9d0/0x9d0 [ 36.840397] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.845129] ? syscall_return_slowpath+0x550/0x550 [ 36.850030] ? syscall_return_slowpath+0x2ac/0x550 [ 36.854934] ? prepare_exit_to_usermode+0x350/0x350 [ 36.859928] ? sysret32_from_system_call+0x5/0x3b [ 36.864747] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.869569] entry_SYSENTER_compat+0x54/0x63 [ 36.873955] RIP: 0023:0xf7fd3c79 [ 36.877289] RSP: 002b:00000000fff60ffc EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 36.884970] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020007000 [ 36.892213] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 [ 36.899456] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 36.906696] R10: 0000000000000000 R11: 0000000000000000 R12