[....] Starting enhanced syslogd: rsyslogd[ 15.035797] audit: type=1400 audit(1518420124.968:5): avc: denied { syslog } for pid=3992 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: [ 19.582679] audit: type=1400 audit(1518420129.515:6): avc: denied { map } for pid=4133 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 '10.128.15.208' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 27.679660] audit: type=1400 audit(1518420137.612:7): avc: denied { map } for pid=4147 comm="syzkaller166907" path="/root/syzkaller166907039" 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 [ 28.052375] 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 [ 28.367382] [ 28.369199] ============================= [ 28.373346] WARNING: suspicious RCU usage [ 28.377491] 4.16.0-rc1+ #309 Not tainted [ 28.381549] ----------------------------- [ 28.385707] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 28.394978] [ 28.394978] other info that might help us debug this: [ 28.394978] [ 28.403128] [ 28.403128] rcu_scheduler_active = 2, debug_locks = 1 [ 28.409797] 1 lock held by syzkaller166907/4147: [ 28.414544] #0: (rcu_read_lock){....}, at: [<00000000d8d9fa04>] __rds_conn_create+0xe46/0x1b50 [ 28.423483] [ 28.423483] stack backtrace: [ 28.427977] CPU: 1 PID: 4147 Comm: syzkaller166907 Not tainted 4.16.0-rc1+ #309 [ 28.435394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.444717] Call Trace: [ 28.447281] dump_stack+0x194/0x257 [ 28.450885] ? arch_local_irq_restore+0x53/0x53 [ 28.455540] lockdep_rcu_suspicious+0x123/0x170 [ 28.460186] ___might_sleep+0x385/0x470 [ 28.464136] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 28.469990] ? __debug_object_init+0x235/0x1040 [ 28.474635] ? debug_mutex_init+0x1c/0x60 [ 28.478760] __might_sleep+0x95/0x190 [ 28.482552] kmem_cache_alloc_trace+0x299/0x740 [ 28.487208] ? lock_acquire+0x1d5/0x580 [ 28.491155] ? lock_acquire+0x1d5/0x580 [ 28.495109] ? __rds_conn_create+0xe46/0x1b50 [ 28.499581] rds_loop_conn_alloc+0xc8/0x380 [ 28.503885] ? rds_loop_conn_free+0x290/0x290 [ 28.508364] ? __init_waitqueue_head+0x97/0x140 [ 28.513018] ? rcutorture_record_progress+0x10/0x10 [ 28.518023] ? __lockdep_init_map+0xe4/0x650 [ 28.522414] __rds_conn_create+0x112f/0x1b50 [ 28.526812] ? rds_conn_drop+0xb0/0xb0 [ 28.530680] ? __raw_spin_lock_init+0x1c/0x100 [ 28.535247] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.540248] ? __lockdep_init_map+0xe4/0x650 [ 28.544629] ? lockdep_init_map+0x9/0x10 [ 28.548663] ? __init_waitqueue_head+0x97/0x140 [ 28.553304] ? init_wait_entry+0x1b0/0x1b0 [ 28.557521] ? lockdep_init_map+0x9/0x10 [ 28.561561] ? rds_message_alloc+0x28c/0x330 [ 28.565942] ? rds_message_next_extension+0x210/0x210 [ 28.571102] ? trace_hardirqs_on+0xd/0x10 [ 28.575232] ? _raw_spin_unlock_bh+0x30/0x40 [ 28.579615] ? __release_sock+0x360/0x360 [ 28.583733] ? lock_sock_nested+0x91/0x110 [ 28.587942] rds_conn_create_outgoing+0x3f/0x50 [ 28.592590] rds_sendmsg+0xda3/0x2390 [ 28.596360] ? avc_has_perm+0x43e/0x680 [ 28.600320] ? rds_send_drop_to+0x19d0/0x19d0 [ 28.604785] ? release_sock+0x1d4/0x2a0 [ 28.608732] ? lock_downgrade+0x980/0x980 [ 28.612857] ? find_held_lock+0x35/0x1d0 [ 28.616907] ? sock_has_perm+0x2a4/0x420 [ 28.620941] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 28.626273] ? lock_release+0xa22/0xa40 [ 28.630218] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 28.636073] ? __check_object_size+0x8b/0x530 [ 28.640538] ? __release_sock+0x360/0x360 [ 28.644663] ? __might_sleep+0x95/0x190 [ 28.648613] ? selinux_socket_sendmsg+0x36/0x40 [ 28.653257] ? security_socket_sendmsg+0x89/0xb0 [ 28.657984] ? rds_send_drop_to+0x19d0/0x19d0 [ 28.662453] sock_sendmsg+0xca/0x110 [ 28.666143] SYSC_sendto+0x361/0x5c0 [ 28.669833] ? SYSC_connect+0x4a0/0x4a0 [ 28.673786] ? security_socket_bind+0x89/0xb0 [ 28.678255] ? SYSC_bind+0x290/0x410 [ 28.681962] ? __do_page_fault+0x3d6/0xc90 [ 28.686186] ? mm_fault_error+0x2c0/0x2c0 [ 28.690309] ? move_addr_to_kernel+0x60/0x60 [ 28.694692] SyS_sendto+0x40/0x50 [ 28.698116] ? SyS_getpeername+0x30/0x30 [ 28.702151] do_syscall_64+0x282/0x940 [ 28.706020] ? __do_page_fault+0xc90/0xc90 [ 28.710233] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 28.714962] ? syscall_return_slowpath+0x550/0x550 [ 28.719865] ? syscall_return_slowpath+0x2ac/0x550 [ 28.724765] ? prepare_exit_to_usermode+0x350/0x350 [ 28.729754] ? entry_SYSCALL_64_after_hwframe+0x36/0x9b [ 28.735094] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.739913] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 28.745075] RIP: 0033:0x445219 [ 28.748236] RSP: 002b:00007fffd28895a8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 28.755915] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000445219 [ 28.763154] RDX: 0000000000000000 RSI: 0000000020007000 RDI: 0000000000000004 [ 28.770394] RBP: 00007fffd28896c8 R08: 0000000020000000 R09: 0000000000000010 [ 28.777634] R10: 0000000000000000 R11: 0000000000000217 R12: 00007fffd28896c8 [ 28.784874] R13: 00000000004026e0 R14: 0000000000000000 R15: 0000000000000000 [ 28.792271] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 28.799722] in_atomic(): 1, irqs_disabled(): 0, pid: 4147, name: syzkaller166907 [ 28.807258] 1 lock held by syzkaller166907/4147: [ 28.812037] #0: (rcu_read_lock){....}, at: [<00000000d8d9fa04>] __rds_conn_create+0xe46/0x1b50 [ 28.820982] CPU: 1 PID: 4147 Comm: syzkaller166907 Not tainted 4.16.0-rc1+ #309 [ 28.828399] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.837721] Call Trace: [ 28.840283] dump_stack+0x194/0x257 [ 28.843888] ? arch_local_irq_restore+0x53/0x53 [ 28.848537] ? print_lock+0x9f/0xa2 [ 28.852136] ? lockdep_print_held_locks+0xc4/0x130 [ 28.857050] ___might_sleep+0x2b2/0x470 [ 28.860995] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 28.866856] ? __debug_object_init+0x235/0x1040 [ 28.871500] ? debug_mutex_init+0x1c/0x60 [ 28.875622] __might_sleep+0x95/0x190 [ 28.879399] kmem_cache_alloc_trace+0x299/0x740 [ 28.884049] ? lock_acquire+0x1d5/0x580 [ 28.888000] ? lock_acquire+0x1d5/0x580 [ 28.891955] ? __rds_conn_create+0xe46/0x1b50 [ 28.896427] rds_loop_conn_alloc+0xc8/0x380 [ 28.900721] ? rds_loop_conn_free+0x290/0x290 [ 28.905191] ? __init_waitqueue_head+0x97/0x140 [ 28.909836] ? rcutorture_record_progress+0x10/0x10 [ 28.914828] ? __lockdep_init_map+0xe4/0x650 [ 28.919229] __rds_conn_create+0x112f/0x1b50 [ 28.923636] ? rds_conn_drop+0xb0/0xb0 [ 28.927506] ? __raw_spin_lock_init+0x1c/0x100 [ 28.932067] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.937065] ? __lockdep_init_map+0xe4/0x650 [ 28.941448] ? lockdep_init_map+0x9/0x10 [ 28.945479] ? __init_waitqueue_head+0x97/0x140 [ 28.950119] ? init_wait_entry+0x1b0/0x1b0 [ 28.954334] ? lockdep_init_map+0x9/0x10 [ 28.958370] ? rds_message_alloc+0x28c/0x330 [ 28.962749] ? rds_message_next_extension+0x210/0x210 [ 28.967909] ? trace_hardirqs_on+0xd/0x10 [ 28.972041] ? _raw_spin_unlock_bh+0x30/0x40 [ 28.976432] ? __release_sock+0x360/0x360 [ 28.980551] ? lock_sock_nested+0x91/0x110 [ 28.984767] rds_conn_create_outgoing+0x3f/0x50 [ 28.989412] rds_sendmsg+0xda3/0x2390 [ 28.993184] ? avc_has_perm+0x43e/0x680 [ 28.997142] ? rds_send_drop_to+0x19d0/0x19d0 [ 29.001609] ? release_sock+0x1d4/0x2a0 [ 29.005558] ? lock_downgrade+0x980/0x980 [ 29.009685] ? find_held_lock+0x35/0x1d0 [ 29.013741] ? sock_has_perm+0x2a4/0x420 [ 29.017777] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 29.023110] ? lock_release+0xa22/0xa40 [ 29.027059] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 29.032916] ? __check_object_size+0x8b/0x530 [ 29.037378] ? __release_sock+0x360/0x360 [ 29.041502] ? __might_sleep+0x95/0x190 [ 29.045451] ? selinux_socket_sendmsg+0x36/0x40 [ 29.050096] ? security_socket_sendmsg+0x89/0xb0 [ 29.054823] ? rds_send_drop_to+0x19d0/0x19d0 [ 29.059292] sock_sendmsg+0xca/0x110 [ 29.062981] SYSC_sendto+0x361/0x5c0 [ 29.066672] ? SYSC_connect+0x4a0/0x4a0 [ 29.070628] ? security_socket_bind+0x89/0xb0 [ 29.075102] ? SYSC_bind+0x290/0x410 [ 29.078806] ? __do_page_fault+0x3d6/0xc90 [ 29.083027] ? mm_fault_error+0x2c0/0x2c0 [ 29.087152] ? move_addr_to_kernel+0x60/0x60 [ 29.091535] SyS_sendto+0x40/0x50 [ 29.094962] ? SyS_getpeername+0x30/0x30 [ 29.098996] do_syscall_64+0x282/0x940 [ 29.102856] ? __do_page_fault+0xc90/0xc90 [ 29.107063] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.111790] ? syscall_return_slowpath+0x550/0x550 [ 29.116689] ? syscall_return_slowpath+0x2ac/0x550 [ 29.121600] ? prepare_exit_to_usermode+0x350/0x350 [ 29.126591] ? entry_SYSCALL_64_after_hwframe+0x36/0x9b [ 29.131933] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.136753] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 29.141913] RIP: 0033:0x445219 [ 29.145076] RSP: 002b:00007fffd28895a8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 29.152758] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000445219 [ 29.159996] RDX: 0000000000000000 RSI: 0000000020007000 RDI: 0000000000000004 [ 29.167246] RBP: 00007fffd28896c8 R08: