[....] Starting enhanced syslogd: rsyslogd[ 16.157419] audit: type=1400 audit(1518389712.310:5): avc: denied { syslog } for pid=4017 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[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Starting mcstransd:
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
syzkaller login: [ 18.694260] audit: type=1400 audit(1518389714.847:6): avc: denied { map } for pid=4157 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.
executing program
[ 25.083371] audit: type=1400 audit(1518389721.236:7): avc: denied { map } for pid=4171 comm="syzkaller147103" path="/root/syzkaller147103591" 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
[ 25.110160]
[ 25.111858] =============================
[ 25.116028] WARNING: suspicious RCU usage
[ 25.120175] 4.15.0+ #222 Not tainted
[ 25.123888] -----------------------------
[ 25.128046] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section!
[ 25.137322]
[ 25.137322] other info that might help us debug this:
[ 25.137322]
[ 25.145477]
[ 25.145477] rcu_scheduler_active = 2, debug_locks = 1
[ 25.152162] 1 lock held by syzkaller147103/4171:
[ 25.156922] #0: (rcu_read_lock){....}, at: [<000000007712517a>] __rds_conn_create+0xe46/0x1b50
[ 25.165875]
[ 25.165875] stack backtrace:
[ 25.170382] CPU: 1 PID: 4171 Comm: syzkaller147103 Not tainted 4.15.0+ #222
[ 25.177455] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 25.186778] Call Trace:
[ 25.189343] dump_stack+0x194/0x257
[ 25.192960] ? arch_local_irq_restore+0x53/0x53
[ 25.197611] lockdep_rcu_suspicious+0x123/0x170
[ 25.202254] ___might_sleep+0x385/0x470
[ 25.206202] ? trace_event_raw_event_sched_switch+0x810/0x810
[ 25.212057] ? __debug_object_init+0x235/0x1040
[ 25.216699] ? debug_mutex_init+0x1c/0x60
[ 25.220824] __might_sleep+0x95/0x190
[ 25.224611] kmem_cache_alloc_trace+0x299/0x740
[ 25.229255] ? lock_acquire+0x1d5/0x580
[ 25.233203] ? lock_acquire+0x1d5/0x580
[ 25.237150] ? __rds_conn_create+0xe46/0x1b50
[ 25.241621] rds_loop_conn_alloc+0xc8/0x380
[ 25.245916] ? rds_loop_conn_free+0x290/0x290
[ 25.250385] ? __init_waitqueue_head+0x97/0x140
[ 25.255035] ? rcutorture_record_progress+0x10/0x10
[ 25.260038] ? __lockdep_init_map+0xe4/0x650
[ 25.264427] __rds_conn_create+0x112f/0x1b50
[ 25.268831] ? rds_conn_drop+0xb0/0xb0
[ 25.272700] ? __raw_spin_lock_init+0x1c/0x100
[ 25.277258] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 25.282252] ? __lockdep_init_map+0xe4/0x650
[ 25.286635] ? lockdep_init_map+0x9/0x10
[ 25.290666] ? __init_waitqueue_head+0x97/0x140
[ 25.295309] ? init_wait_entry+0x1b0/0x1b0
[ 25.299523] ? lockdep_init_map+0x9/0x10
[ 25.303561] ? rds_message_alloc+0x28c/0x330
[ 25.307945] ? rds_message_next_extension+0x210/0x210
[ 25.313108] ? trace_hardirqs_on+0xd/0x10
[ 25.317233] ? _raw_spin_unlock_bh+0x30/0x40
[ 25.321619] ? __release_sock+0x360/0x360
[ 25.325736] ? lock_sock_nested+0x91/0x110
[ 25.329948] rds_conn_create_outgoing+0x3f/0x50
[ 25.334594] rds_sendmsg+0xda3/0x2390
[ 25.338366] ? avc_has_perm+0x43e/0x680
[ 25.342331] ? rds_send_drop_to+0x19d0/0x19d0
[ 25.346809] ? _raw_spin_unlock_irq+0x27/0x70
[ 25.351279] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 25.356270] ? find_held_lock+0x35/0x1d0
[ 25.360313] ? sock_has_perm+0x2a4/0x420
[ 25.364350] ? selinux_secmark_relabel_packet+0xc0/0xc0
[ 25.369683] ? lock_release+0xa02/0xa40
[ 25.373628] ? trace_event_raw_event_sched_switch+0x810/0x810
[ 25.379485] ? __check_object_size+0x8b/0x530
[ 25.383962] ? __handle_mm_fault+0x80e/0x3ce0
[ 25.388441] ? __might_sleep+0x95/0x190
[ 25.392392] ? selinux_socket_sendmsg+0x36/0x40
[ 25.397036] ? security_socket_sendmsg+0x89/0xb0
[ 25.401765] ? rds_send_drop_to+0x19d0/0x19d0
[ 25.406237] sock_sendmsg+0xca/0x110
[ 25.409923] SYSC_sendto+0x361/0x5c0
[ 25.413614] ? SYSC_connect+0x4a0/0x4a0
[ 25.417567] ? __do_page_fault+0x5f7/0xc90
[ 25.421774] ? lock_downgrade+0x980/0x980
[ 25.425902] ? handle_mm_fault+0x43b/0x970
[ 25.430132] ? up_read+0x1a/0x40
[ 25.433472] ? __do_page_fault+0x3d6/0xc90
[ 25.437684] ? mm_fault_error+0x2c0/0x2c0
[ 25.441804] ? trace_event_raw_event_sys_exit+0x260/0x260
[ 25.447317] SyS_sendto+0x40/0x50
[ 25.450747] ? SyS_getpeername+0x30/0x30
[ 25.454781] do_syscall_64+0x282/0x940
[ 25.458638] ? __do_page_fault+0xc90/0xc90
[ 25.462848] ? trace_hardirqs_on_thunk+0x1a/0x1c
[ 25.467579] ? syscall_return_slowpath+0x550/0x550
[ 25.472488] ? syscall_return_slowpath+0x2ac/0x550
[ 25.477391] ? prepare_exit_to_usermode+0x350/0x350
[ 25.482384] ? retint_user+0x18/0x18
[ 25.486074] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 25.490898] entry_SYSCALL_64_after_hwframe+0x26/0x9b
[ 25.496060] RIP: 0033:0x43fd99
[ 25.499221] RSP: 002b:00007fff91ff7578 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[ 25.506901] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99
[ 25.514144] RDX: 0000000000000000 RSI: 000000002056a000 RDI: 0000000000000003
[ 25.521386] RBP: 00000000006ca018 R08: 0000000020dfcff0 R09: 0000000000000010
[ 25.528629] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004016c0
[ 25.535869] R13: 0000000000401750 R14: 0000000000000000 R15: 0000000000000000
[ 25.543203] BUG: sleeping function called from invalid context at mm/slab.h:420
[ 25.550686] in_atomic(): 1, irqs_disabled(): 0, pid: 4171, name: syzkaller147103
[ 25.558256] 1 lock held by syzkaller147103/4171:
[ 25.563042] #0: (rcu_read_lock){....}, at: [<000000007712517a>] __rds_conn_create+0xe46/0x1b50
[ 25.572066] CPU: 1 PID: 4171 Comm: syzkaller147103 Not tainted 4.15.0+ #222
[ 25.579149] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 25.588474] Call Trace:
[ 25.591039] dump_stack+0x194/0x257
[ 25.594644] ? arch_local_irq_restore+0x53/0x53
[ 25.599286] ? print_lock+0x9f/0xa2
[ 25.602887] ? lockdep_print_held_locks+0xc4/0x130
[ 25.607793] ___might_sleep+0x2b2/0x470
[ 25.611741] ? trace_event_raw_event_sched_switch+0x810/0x810
[ 25.617595] ? __debug_object_init+0x235/0x1040
[ 25.622239] ? debug_mutex_init+0x1c/0x60
[ 25.626364] __might_sleep+0x95/0x190
[ 25.630140] kmem_cache_alloc_trace+0x299/0x740
[ 25.634784] ? lock_acquire+0x1d5/0x580
[ 25.638729] ? lock_acquire+0x1d5/0x580
[ 25.642676] ? __rds_conn_create+0xe46/0x1b50
[ 25.647149] rds_loop_conn_alloc+0xc8/0x380
[ 25.651443] ? rds_loop_conn_free+0x290/0x290
[ 25.655913] ? __init_waitqueue_head+0x97/0x140
[ 25.660556] ? rcutorture_record_progress+0x10/0x10
[ 25.665559] ? __lockdep_init_map+0xe4/0x650
[ 25.669943] __rds_conn_create+0x112f/0x1b50
[ 25.674349] ? rds_conn_drop+0xb0/0xb0
[ 25.678220] ? __raw_spin_lock_init+0x1c/0x100
[ 25.682776] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 25.687768] ? __lockdep_init_map+0xe4/0x650
[ 25.692167] ? lockdep_init_map+0x9/0x10
[ 25.696217] ? __init_waitqueue_head+0x97/0x140
[ 25.700860] ? init_wait_entry+0x1b0/0x1b0
[ 25.705071] ? lockdep_init_map+0x9/0x10
[ 25.709111] ? rds_message_alloc+0x28c/0x330
[ 25.713496] ? rds_message_next_extension+0x210/0x210
[ 25.718655] ? trace_hardirqs_on+0xd/0x10
[ 25.722779] ? _raw_spin_unlock_bh+0x30/0x40
[ 25.727164] ? __release_sock+0x360/0x360
[ 25.731281] ? lock_sock_nested+0x91/0x110
[ 25.735493] rds_conn_create_outgoing+0x3f/0x50
[ 25.740143] rds_sendmsg+0xda3/0x2390
[ 25.743914] ? avc_has_perm+0x43e/0x680
[ 25.747875] ? rds_send_drop_to+0x19d0/0x19d0
[ 25.752344] ? _raw_spin_unlock_irq+0x27/0x70
[ 25.756814] ? trace_hardirqs_on_caller+0x421/0x5c0
[ 25.761805] ? find_held_lock+0x35/0x1d0
[ 25.765850] ? sock_has_perm+0x2a4/0x420
[ 25.769888] ? selinux_secmark_relabel_packet+0xc0/0xc0
[ 25.775229] ? lock_release+0xa02/0xa40
[ 25.779175] ? trace_event_raw_event_sched_switch+0x810/0x810
[ 25.785036] ? __check_object_size+0x8b/0x530
[ 25.789503] ? __handle_mm_fault+0x80e/0x3ce0
[ 25.793976] ? __might_sleep+0x95/0x190
[ 25.797932] ? selinux_socket_sendmsg+0x36/0x40
[ 25.802571] ? security_socket_sendmsg+0x89/0xb0
[ 25.807303] ? rds_send_drop_to+0x19d0/0x19d0
[ 25.811775] sock_sendmsg+0xca/0x110
[ 25.815465] SYSC_sendto+0x361/0x5c0
[ 25.819156] ? SYSC_connect+0x4a0/0x4a0
[ 25.823109] ? __do_page_fault+0x5f7/0xc90
[ 25.827317] ? lock_downgrade+0x980/0x980
[ 25.831444] ? handle_mm_fault+0x43b/0x970
[ 25.835662] ? up_read+0x1a/0x40
[ 25.838999] ? __do_page_fault+0x3d6/0xc90
[ 25.843224] ? mm_fault_error+0x2c0/0x2c0
[ 25.847345] ? trace_event_raw_event_sys_exit+0x260/0x260
[ 25.852857] SyS_sendto+0x40/0x50
[ 25.856283] ? SyS_getpeername+0x30/0x30
[ 25.860322] do_syscall_64+0x282/0x940
[ 25.864180] ? __do_page_fault+0xc90/0xc90
[ 25.868386] ? trace_hardirqs_on_thunk+0x1a/0x1c
[ 25.873114] ? syscall_return_slowpath+0x550/0x550
[ 25.878025] ? syscall_return_slowpath+0x2ac/0x550
[ 25.882928] ? prepare_exit_to_usermode+0x350/0x350
[ 25.887920] ? retint_user+0x18/0x18
[ 25.891610] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 25.896431] entry_SYSCALL_64_after_hwframe+0x26/0x9b
[ 25.901592] RIP: 0033:0x43fd99
[ 25.904755] RSP: 002b:00007fff91ff7578 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
[ 25.912436] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd99
[ 25.919676] RDX: 0000000000000000 RSI: 000000002056a000 RDI: 0000000000000003
[ 25.926916] RBP: 00000000006ca018 R08: 0000000020dfcff0 R09: 0000000000000010
[ 25.934159] R10: 000000000000000