[?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. [ 17.239859] audit: type=1400 audit(1518282802.116:6): avc: denied { map } for pid=4095 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 '10.128.15.206' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 syzkaller login: [ 23.516923] audit: type=1400 audit(1518282808.393:7): avc: denied { map } for pid=4109 comm="syzkaller578091" path="/root/syzkaller578091879" 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 [ 23.890561] 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 [ 24.206979] [ 24.208715] ============================= [ 24.213156] WARNING: suspicious RCU usage [ 24.217322] 4.15.0+ #217 Not tainted [ 24.221039] ----------------------------- [ 24.225191] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 24.234460] [ 24.234460] other info that might help us debug this: [ 24.234460] [ 24.242602] [ 24.242602] rcu_scheduler_active = 2, debug_locks = 1 [ 24.249266] 1 lock held by syzkaller578091/4109: [ 24.254034] #0: (rcu_read_lock){....}, at: [<0000000085c58819>] __rds_conn_create+0xe46/0x1b50 [ 24.262989] [ 24.262989] stack backtrace: [ 24.267499] CPU: 0 PID: 4109 Comm: syzkaller578091 Not tainted 4.15.0+ #217 [ 24.274581] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.283907] Call Trace: [ 24.286471] dump_stack+0x194/0x257 [ 24.290077] ? arch_local_irq_restore+0x53/0x53 [ 24.294731] lockdep_rcu_suspicious+0x123/0x170 [ 24.299388] ___might_sleep+0x385/0x470 [ 24.303344] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.309201] ? debug_mutex_init+0x1c/0x60 [ 24.313325] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.318318] __might_sleep+0x95/0x190 [ 24.322096] kmem_cache_alloc+0x2a2/0x760 [ 24.326218] ? lock_acquire+0x1d5/0x580 [ 24.330169] ? __rds_conn_create+0xe46/0x1b50 [ 24.334638] ? SyS_membarrier+0x700/0x700 [ 24.338757] ? init_timer_key+0x163/0x3f0 [ 24.342881] rds_tcp_conn_alloc+0xa7/0x4e0 [ 24.347097] ? rds_tcp_conn_free+0x2d0/0x2d0 [ 24.351489] ? rds_cmsg_atomic+0xff0/0xff0 [ 24.355708] ? __lockdep_init_map+0xe4/0x650 [ 24.360090] ? rds_cmsg_atomic+0xff0/0xff0 [ 24.364299] __rds_conn_create+0x112f/0x1b50 [ 24.368701] ? rds_conn_drop+0xb0/0xb0 [ 24.372572] ? __raw_spin_lock_init+0x1c/0x100 [ 24.377135] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.382133] ? __lockdep_init_map+0xe4/0x650 [ 24.386518] ? lockdep_init_map+0x9/0x10 [ 24.390553] ? __init_waitqueue_head+0x97/0x140 [ 24.395195] ? init_wait_entry+0x1b0/0x1b0 [ 24.399408] ? lockdep_init_map+0x9/0x10 [ 24.403447] ? rds_message_alloc+0x28c/0x330 [ 24.407828] ? rds_message_next_extension+0x210/0x210 [ 24.412989] ? trace_hardirqs_on+0xd/0x10 [ 24.417122] ? _raw_spin_unlock_bh+0x30/0x40 [ 24.421510] ? __release_sock+0x360/0x360 [ 24.425636] ? lock_sock_nested+0x91/0x110 [ 24.429848] rds_conn_create_outgoing+0x3f/0x50 [ 24.434496] rds_sendmsg+0xda3/0x2390 [ 24.438270] ? avc_has_perm+0x43e/0x680 [ 24.442230] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.446702] ? lock_downgrade+0x980/0x980 [ 24.450825] ? find_held_lock+0x35/0x1d0 [ 24.454869] ? sock_has_perm+0x2a4/0x420 [ 24.458906] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 24.464242] ? lock_release+0xa02/0xa40 [ 24.468193] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.474062] ? __check_object_size+0x8b/0x530 [ 24.478530] ? __release_sock+0x360/0x360 [ 24.482656] ? __might_sleep+0x95/0x190 [ 24.486606] ? selinux_socket_sendmsg+0x36/0x40 [ 24.491253] ? security_socket_sendmsg+0x89/0xb0 [ 24.495983] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.500455] sock_sendmsg+0xca/0x110 [ 24.504149] SYSC_sendto+0x361/0x5c0 [ 24.507841] ? SYSC_connect+0x4a0/0x4a0 [ 24.511791] ? find_held_lock+0x35/0x1d0 [ 24.515834] ? lock_downgrade+0x980/0x980 [ 24.519978] ? up_read+0x1a/0x40 [ 24.523322] ? __do_page_fault+0x3d6/0xc90 [ 24.527540] SyS_sendto+0x40/0x50 [ 24.530967] ? SyS_getpeername+0x30/0x30 [ 24.535007] do_fast_syscall_32+0x3ee/0xfa1 [ 24.539313] ? do_int80_syscall_32+0x9d0/0x9d0 [ 24.543869] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.548605] ? syscall_return_slowpath+0x550/0x550 [ 24.553517] ? syscall_return_slowpath+0x2ac/0x550 [ 24.558424] ? prepare_exit_to_usermode+0x350/0x350 [ 24.563416] ? retint_user+0x18/0x18 [ 24.567127] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.571964] entry_SYSENTER_compat+0x54/0x63 [ 24.576345] RIP: 0023:0xf7f9ac79 [ 24.579680] RSP: 002b:00000000ffffd4dc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 24.587362] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020fc2000 [ 24.594612] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002069affb [ 24.601853] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 24.609103] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 24.616348] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 24.623702] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 24.631159] in_atomic(): 1, irqs_disabled(): 0, pid: 4109, name: syzkaller578091 [ 24.638696] 1 lock held by syzkaller578091/4109: [ 24.643452] #0: (rcu_read_lock){....}, at: [<0000000085c58819>] __rds_conn_create+0xe46/0x1b50 [ 24.652410] CPU: 0 PID: 4109 Comm: syzkaller578091 Not tainted 4.15.0+ #217 [ 24.659492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.668820] Call Trace: [ 24.671385] dump_stack+0x194/0x257 [ 24.674992] ? arch_local_irq_restore+0x53/0x53 [ 24.679638] ? print_lock+0x9f/0xa2 [ 24.683238] ? lockdep_print_held_locks+0xc4/0x130 [ 24.688145] ___might_sleep+0x2b2/0x470 [ 24.692096] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.697973] ? debug_mutex_init+0x1c/0x60 [ 24.702102] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.707101] __might_sleep+0x95/0x190 [ 24.710880] kmem_cache_alloc+0x2a2/0x760 [ 24.715000] ? lock_acquire+0x1d5/0x580 [ 24.718956] ? __rds_conn_create+0xe46/0x1b50 [ 24.723427] ? SyS_membarrier+0x700/0x700 [ 24.727548] ? init_timer_key+0x163/0x3f0 [ 24.731673] rds_tcp_conn_alloc+0xa7/0x4e0 [ 24.735893] ? rds_tcp_conn_free+0x2d0/0x2d0 [ 24.740275] ? rds_cmsg_atomic+0xff0/0xff0 [ 24.744486] ? __lockdep_init_map+0xe4/0x650 [ 24.748871] ? rds_cmsg_atomic+0xff0/0xff0 [ 24.753087] __rds_conn_create+0x112f/0x1b50 [ 24.757488] ? rds_conn_drop+0xb0/0xb0 [ 24.761359] ? __raw_spin_lock_init+0x1c/0x100 [ 24.765918] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.770912] ? __lockdep_init_map+0xe4/0x650 [ 24.775295] ? lockdep_init_map+0x9/0x10 [ 24.779331] ? __init_waitqueue_head+0x97/0x140 [ 24.783973] ? init_wait_entry+0x1b0/0x1b0 [ 24.788185] ? lockdep_init_map+0x9/0x10 [ 24.792225] ? rds_message_alloc+0x28c/0x330 [ 24.796615] ? rds_message_next_extension+0x210/0x210 [ 24.801780] ? trace_hardirqs_on+0xd/0x10 [ 24.805910] ? _raw_spin_unlock_bh+0x30/0x40 [ 24.810298] ? __release_sock+0x360/0x360 [ 24.814418] ? lock_sock_nested+0x91/0x110 [ 24.818633] rds_conn_create_outgoing+0x3f/0x50 [ 24.823289] rds_sendmsg+0xda3/0x2390 [ 24.827073] ? avc_has_perm+0x43e/0x680 [ 24.831051] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.835530] ? lock_downgrade+0x980/0x980 [ 24.839657] ? find_held_lock+0x35/0x1d0 [ 24.843699] ? sock_has_perm+0x2a4/0x420 [ 24.848111] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 24.853449] ? lock_release+0xa02/0xa40 [ 24.857401] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.863260] ? __check_object_size+0x8b/0x530 [ 24.867727] ? __release_sock+0x360/0x360 [ 24.871856] ? __might_sleep+0x95/0x190 [ 24.875807] ? selinux_socket_sendmsg+0x36/0x40 [ 24.880451] ? security_socket_sendmsg+0x89/0xb0 [ 24.885184] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.889658] sock_sendmsg+0xca/0x110 [ 24.893353] SYSC_sendto+0x361/0x5c0 [ 24.897054] ? SYSC_connect+0x4a0/0x4a0 [ 24.901016] ? find_held_lock+0x35/0x1d0 [ 24.905071] ? lock_downgrade+0x980/0x980 [ 24.909214] ? up_read+0x1a/0x40 [ 24.912558] ? __do_page_fault+0x3d6/0xc90 [ 24.916774] SyS_sendto+0x40/0x50 [ 24.920201] ? SyS_getpeername+0x30/0x30 [ 24.924236] do_fast_syscall_32+0x3ee/0xfa1 [ 24.928544] ? do_int80_syscall_32+0x9d0/0x9d0 [ 24.933104] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.937835] ? syscall_return_slowpath+0x550/0x550 [ 24.942751] ? syscall_return_slowpath+0x2ac/0x550 [ 24.947654] ? prepare_exit_to_usermode+0x350/0x350 [ 24.952650] ? retint_user+0x18/0x18 [ 24.956345] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.961171] entry_SYSENTER_compat+0x54/0x63 [ 24.965550] RIP: 0023:0xf7f9ac79 [ 24.968883] RSP: 002b:00000000ffffd4dc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 24.976564] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020fc2000 [ 24.983805] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002069affb [ 24.991049] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 24.998295] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.005536] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000