[?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. [ 18.726387] audit: type=1400 audit(1518299614.865:6): avc: denied { map } for pid=4158 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 '10.128.0.27' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.992435] audit: type=1400 audit(1518299621.131:7): avc: denied { map } for pid=4172 comm="syzkaller725285" path="/root/syzkaller725285542" 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 [ 25.019481] [ 25.021201] ============================= [ 25.025373] WARNING: suspicious RCU usage [ 25.029531] 4.15.0+ #222 Not tainted [ 25.033251] ----------------------------- [ 25.037404] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 25.046705] [ 25.046705] other info that might help us debug this: [ 25.046705] [ 25.054868] [ 25.054868] rcu_scheduler_active = 2, debug_locks = 1 [ 25.061565] 1 lock held by syzkaller725285/4172: [ 25.066342] #0: (rcu_read_lock){....}, at: [<00000000622aac3a>] __rds_conn_create+0xe46/0x1b50 [ 25.075300] [ 25.075300] stack backtrace: [ 25.079807] CPU: 1 PID: 4172 Comm: syzkaller725285 Not tainted 4.15.0+ #222 [ 25.086884] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.096212] Call Trace: [ 25.098777] dump_stack+0x194/0x257 [ 25.102380] ? arch_local_irq_restore+0x53/0x53 [ 25.107035] lockdep_rcu_suspicious+0x123/0x170 [ 25.111693] ___might_sleep+0x385/0x470 [ 25.115667] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.121527] ? __debug_object_init+0x235/0x1040 [ 25.126177] ? debug_mutex_init+0x1c/0x60 [ 25.130302] __might_sleep+0x95/0x190 [ 25.134082] kmem_cache_alloc_trace+0x299/0x740 [ 25.138725] ? lock_acquire+0x1d5/0x580 [ 25.142672] ? lock_acquire+0x1d5/0x580 [ 25.146621] ? __rds_conn_create+0xe46/0x1b50 [ 25.151095] rds_loop_conn_alloc+0xc8/0x380 [ 25.155393] ? rds_loop_conn_free+0x290/0x290 [ 25.159867] ? __init_waitqueue_head+0x97/0x140 [ 25.164518] ? rcutorture_record_progress+0x10/0x10 [ 25.169519] ? __lockdep_init_map+0xe4/0x650 [ 25.173912] __rds_conn_create+0x112f/0x1b50 [ 25.178315] ? rds_conn_drop+0xb0/0xb0 [ 25.182186] ? __raw_spin_lock_init+0x1c/0x100 [ 25.186743] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.191739] ? __lockdep_init_map+0xe4/0x650 [ 25.196125] ? lockdep_init_map+0x9/0x10 [ 25.200160] ? __init_waitqueue_head+0x97/0x140 [ 25.204805] ? init_wait_entry+0x1b0/0x1b0 [ 25.209030] ? lockdep_init_map+0x9/0x10 [ 25.213086] ? rds_message_alloc+0x28c/0x330 [ 25.217471] ? rds_message_next_extension+0x210/0x210 [ 25.222643] ? trace_hardirqs_on+0xd/0x10 [ 25.226768] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.231156] ? __release_sock+0x360/0x360 [ 25.235283] ? lock_sock_nested+0x91/0x110 [ 25.239497] rds_conn_create_outgoing+0x3f/0x50 [ 25.244145] rds_sendmsg+0xda3/0x2390 [ 25.247927] ? avc_has_perm+0x43e/0x680 [ 25.251902] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.256375] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.260849] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.265847] ? find_held_lock+0x35/0x1d0 [ 25.269895] ? sock_has_perm+0x2a4/0x420 [ 25.273935] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.279275] ? lock_release+0xa02/0xa40 [ 25.283226] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.289088] ? __check_object_size+0x8b/0x530 [ 25.293559] ? __handle_mm_fault+0x80e/0x3ce0 [ 25.298044] ? __might_sleep+0x95/0x190 [ 25.302007] ? selinux_socket_sendmsg+0x36/0x40 [ 25.306652] ? security_socket_sendmsg+0x89/0xb0 [ 25.311389] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.315886] sock_sendmsg+0xca/0x110 [ 25.319603] SYSC_sendto+0x361/0x5c0 [ 25.323320] ? SYSC_connect+0x4a0/0x4a0 [ 25.327286] ? __do_page_fault+0x5f7/0xc90 [ 25.331500] ? lock_downgrade+0x980/0x980 [ 25.335630] ? handle_mm_fault+0x43b/0x970 [ 25.339860] ? up_read+0x1a/0x40 [ 25.343207] ? __do_page_fault+0x3d6/0xc90 [ 25.347422] ? mm_fault_error+0x2c0/0x2c0 [ 25.351719] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.357233] SyS_sendto+0x40/0x50 [ 25.360659] ? SyS_getpeername+0x30/0x30 [ 25.364694] do_syscall_64+0x282/0x940 [ 25.368556] ? __do_page_fault+0xc90/0xc90 [ 25.372765] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.377497] ? syscall_return_slowpath+0x550/0x550 [ 25.382401] ? syscall_return_slowpath+0x2ac/0x550 [ 25.387304] ? prepare_exit_to_usermode+0x350/0x350 [ 25.392296] ? retint_user+0x18/0x18 [ 25.395986] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.400808] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 25.405970] RIP: 0033:0x43fd99 [ 25.409131] RSP: 002b:00007fff88f806c8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 25.416810] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 25.424064] RDX: 0000000000000000 RSI: 0000000020218000 RDI: 0000000000000003 [ 25.431309] RBP: 00000000006ca018 R08: 0000000020062000 R09: 0000000000000010 [ 25.438550] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004016c0 [ 25.445795] R13: 0000000000401750 R14: 0000000000000000 R15: 0000000000000000 [ 25.453119] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 25.460573] in_atomic(): 1, irqs_disabled(): 0, pid: 4172, name: syzkaller725285 [ 25.468114] 1 lock held by syzkaller725285/4172: [ 25.472873] #0: (rcu_read_lock){....}, at: [<00000000622aac3a>] __rds_conn_create+0xe46/0x1b50 [ 25.481831] CPU: 1 PID: 4172 Comm: syzkaller725285 Not tainted 4.15.0+ #222 [ 25.488928] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.498256] Call Trace: [ 25.500821] dump_stack+0x194/0x257 [ 25.504427] ? arch_local_irq_restore+0x53/0x53 [ 25.509089] ? print_lock+0x9f/0xa2 [ 25.512689] ? lockdep_print_held_locks+0xc4/0x130 [ 25.517598] ___might_sleep+0x2b2/0x470 [ 25.521546] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.527403] ? __debug_object_init+0x235/0x1040 [ 25.532054] ? debug_mutex_init+0x1c/0x60 [ 25.536180] __might_sleep+0x95/0x190 [ 25.539957] kmem_cache_alloc_trace+0x299/0x740 [ 25.544602] ? lock_acquire+0x1d5/0x580 [ 25.548550] ? lock_acquire+0x1d5/0x580 [ 25.552498] ? __rds_conn_create+0xe46/0x1b50 [ 25.556969] rds_loop_conn_alloc+0xc8/0x380 [ 25.561265] ? rds_loop_conn_free+0x290/0x290 [ 25.565746] ? __init_waitqueue_head+0x97/0x140 [ 25.570397] ? rcutorture_record_progress+0x10/0x10 [ 25.575398] ? __lockdep_init_map+0xe4/0x650 [ 25.579785] __rds_conn_create+0x112f/0x1b50 [ 25.584186] ? rds_conn_drop+0xb0/0xb0 [ 25.588057] ? __raw_spin_lock_init+0x1c/0x100 [ 25.592613] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.597626] ? __lockdep_init_map+0xe4/0x650 [ 25.602039] ? lockdep_init_map+0x9/0x10 [ 25.606089] ? __init_waitqueue_head+0x97/0x140 [ 25.610733] ? init_wait_entry+0x1b0/0x1b0 [ 25.614947] ? lockdep_init_map+0x9/0x10 [ 25.618986] ? rds_message_alloc+0x28c/0x330 [ 25.623370] ? rds_message_next_extension+0x210/0x210 [ 25.628530] ? trace_hardirqs_on+0xd/0x10 [ 25.632655] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.637046] ? __release_sock+0x360/0x360 [ 25.641174] ? lock_sock_nested+0x91/0x110 [ 25.645394] rds_conn_create_outgoing+0x3f/0x50 [ 25.650044] rds_sendmsg+0xda3/0x2390 [ 25.653822] ? avc_has_perm+0x43e/0x680 [ 25.657781] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.662251] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.666720] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.671713] ? find_held_lock+0x35/0x1d0 [ 25.675755] ? sock_has_perm+0x2a4/0x420 [ 25.679792] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.685128] ? lock_release+0xa02/0xa40 [ 25.689076] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 25.694937] ? __check_object_size+0x8b/0x530 [ 25.699407] ? __handle_mm_fault+0x80e/0x3ce0 [ 25.703883] ? __might_sleep+0x95/0x190 [ 25.707836] ? selinux_socket_sendmsg+0x36/0x40 [ 25.712482] ? security_socket_sendmsg+0x89/0xb0 [ 25.717213] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.722246] sock_sendmsg+0xca/0x110 [ 25.725938] SYSC_sendto+0x361/0x5c0 [ 25.729629] ? SYSC_connect+0x4a0/0x4a0 [ 25.733581] ? __do_page_fault+0x5f7/0xc90 [ 25.737790] ? lock_downgrade+0x980/0x980 [ 25.741917] ? handle_mm_fault+0x43b/0x970 [ 25.746138] ? up_read+0x1a/0x40 [ 25.749478] ? __do_page_fault+0x3d6/0xc90 [ 25.753693] ? mm_fault_error+0x2c0/0x2c0 [ 25.757813] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 25.763327] SyS_sendto+0x40/0x50 [ 25.766753] ? SyS_getpeername+0x30/0x30 [ 25.770797] do_syscall_64+0x282/0x940 [ 25.774654] ? __do_page_fault+0xc90/0xc90 [ 25.778865] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.783595] ? syscall_return_slowpath+0x550/0x550 [ 25.788499] ? syscall_return_slowpath+0x2ac/0x550 [ 25.793497] ? prepare_exit_to_usermode+0x350/0x350 [ 25.798488] ? retint_user+0x18/0x18 [ 25.802178] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.806999] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 25.812166] RIP: 0033:0x43fd99 [ 25.815332] RSP: 002b:00007fff88f806c8 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 25.823017] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99 [ 25.830265] RDX: 0000000000000000 RSI: 0000000020218000 RDI: 0000000000000003 [ 25.837508] RBP: 00000000006ca018 R08: 0000000020062000 R09: 0000000000000010 [ 25.844749] R10