[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 17.432046] audit: type=1400 audit(1518355962.494:6): avc: denied { map } for pid=4087 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 '10.128.0.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.745505] audit: type=1400 audit(1518355968.808:7): avc: denied { map } for pid=4101 comm="syzkaller583028" path="/root/syzkaller583028205" 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 [ 23.772699] [ 23.774604] ============================= [ 23.778856] WARNING: suspicious RCU usage [ 23.783038] 4.15.0+ #218 Not tainted [ 23.786753] ----------------------------- [ 23.790904] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 23.800177] [ 23.800177] other info that might help us debug this: [ 23.800177] [ 23.808321] [ 23.808321] rcu_scheduler_active = 2, debug_locks = 1 [ 23.814998] 1 lock held by syzkaller583028/4101: [ 23.819762] #0: (rcu_read_lock){....}, at: [<0000000019e8be2f>] __rds_conn_create+0xe46/0x1b50 [ 23.828716] [ 23.828716] stack backtrace: [ 23.833218] CPU: 0 PID: 4101 Comm: syzkaller583028 Not tainted 4.15.0+ #218 [ 23.840292] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.849623] Call Trace: [ 23.852190] dump_stack+0x194/0x257 [ 23.855795] ? arch_local_irq_restore+0x53/0x53 [ 23.860449] lockdep_rcu_suspicious+0x123/0x170 [ 23.865094] ___might_sleep+0x385/0x470 [ 23.869041] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 23.874896] ? __debug_object_init+0x235/0x1040 [ 23.879539] ? debug_mutex_init+0x1c/0x60 [ 23.883662] __might_sleep+0x95/0x190 [ 23.887441] kmem_cache_alloc_trace+0x299/0x740 [ 23.892090] ? lock_acquire+0x1d5/0x580 [ 23.896042] ? lock_acquire+0x1d5/0x580 [ 23.899997] ? __rds_conn_create+0xe46/0x1b50 [ 23.904484] rds_loop_conn_alloc+0xc8/0x380 [ 23.908786] ? rds_loop_conn_free+0x290/0x290 [ 23.913253] ? __init_waitqueue_head+0x97/0x140 [ 23.917899] ? rcutorture_record_progress+0x10/0x10 [ 23.922894] ? __lockdep_init_map+0xe4/0x650 [ 23.927285] __rds_conn_create+0x112f/0x1b50 [ 23.931686] ? rds_conn_drop+0xb0/0xb0 [ 23.935559] ? __raw_spin_lock_init+0x1c/0x100 [ 23.940119] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.945112] ? __lockdep_init_map+0xe4/0x650 [ 23.949494] ? lockdep_init_map+0x9/0x10 [ 23.953529] ? __init_waitqueue_head+0x97/0x140 [ 23.958234] ? init_wait_entry+0x1b0/0x1b0 [ 23.962446] ? lockdep_init_map+0x9/0x10 [ 23.966484] ? rds_message_alloc+0x28c/0x330 [ 23.970866] ? rds_message_next_extension+0x210/0x210 [ 23.976034] ? trace_hardirqs_on+0xd/0x10 [ 23.980169] ? _raw_spin_unlock_bh+0x30/0x40 [ 23.984552] ? __release_sock+0x360/0x360 [ 23.988670] ? lock_sock_nested+0x91/0x110 [ 23.992887] rds_conn_create_outgoing+0x3f/0x50 [ 23.997532] rds_sendmsg+0xda3/0x2390 [ 24.001305] ? avc_has_perm+0x43e/0x680 [ 24.005273] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.009745] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.014214] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.019210] ? find_held_lock+0x35/0x1d0 [ 24.023252] ? sock_has_perm+0x2a4/0x420 [ 24.027287] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 24.032633] ? lock_release+0xa22/0xa40 [ 24.036587] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.042446] ? __check_object_size+0x8b/0x530 [ 24.046924] ? __might_sleep+0x95/0x190 [ 24.050890] ? selinux_socket_sendmsg+0x36/0x40 [ 24.055531] ? security_socket_sendmsg+0x89/0xb0 [ 24.060260] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.064732] sock_sendmsg+0xca/0x110 [ 24.068420] SYSC_sendto+0x361/0x5c0 [ 24.072112] ? SYSC_connect+0x4a0/0x4a0 [ 24.076073] ? find_held_lock+0x35/0x1d0 [ 24.080124] ? lock_downgrade+0x980/0x980 [ 24.084265] ? up_read+0x1a/0x40 [ 24.087603] ? __do_page_fault+0x3d6/0xc90 [ 24.091817] SyS_sendto+0x40/0x50 [ 24.095247] ? SyS_getpeername+0x30/0x30 [ 24.099289] do_fast_syscall_32+0x3ee/0xfa1 [ 24.103590] ? do_int80_syscall_32+0x9d0/0x9d0 [ 24.108145] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.112875] ? syscall_return_slowpath+0x550/0x550 [ 24.117779] ? syscall_return_slowpath+0x2ac/0x550 [ 24.122683] ? prepare_exit_to_usermode+0x350/0x350 [ 24.127674] ? retint_user+0x18/0x18 [ 24.131367] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.136191] entry_SYSENTER_compat+0x54/0x63 [ 24.140570] RIP: 0023:0xf7f0ac79 [ 24.143902] RSP: 002b:00000000ffe76c6c EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 24.151580] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020218000 [ 24.158826] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020062000 [ 24.166072] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 24.173312] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 24.180554] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 24.187854] BUG: sleeping function called from invalid context at mm/slab.h:420 [ 24.195312] in_atomic(): 1, irqs_disabled(): 0, pid: 4101, name: syzkaller583028 [ 24.202855] 1 lock held by syzkaller583028/4101: [ 24.207618] #0: (rcu_read_lock){....}, at: [<0000000019e8be2f>] __rds_conn_create+0xe46/0x1b50 [ 24.216574] CPU: 0 PID: 4101 Comm: syzkaller583028 Not tainted 4.15.0+ #218 [ 24.223675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.233001] Call Trace: [ 24.235565] dump_stack+0x194/0x257 [ 24.239170] ? arch_local_irq_restore+0x53/0x53 [ 24.243812] ? print_lock+0x9f/0xa2 [ 24.247410] ? lockdep_print_held_locks+0xc4/0x130 [ 24.252318] ___might_sleep+0x2b2/0x470 [ 24.256266] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.262120] ? __debug_object_init+0x235/0x1040 [ 24.266763] ? debug_mutex_init+0x1c/0x60 [ 24.270889] __might_sleep+0x95/0x190 [ 24.274669] kmem_cache_alloc_trace+0x299/0x740 [ 24.279312] ? lock_acquire+0x1d5/0x580 [ 24.283257] ? lock_acquire+0x1d5/0x580 [ 24.287204] ? __rds_conn_create+0xe46/0x1b50 [ 24.291685] rds_loop_conn_alloc+0xc8/0x380 [ 24.295988] ? rds_loop_conn_free+0x290/0x290 [ 24.300456] ? __init_waitqueue_head+0x97/0x140 [ 24.305100] ? rcutorture_record_progress+0x10/0x10 [ 24.310090] ? __lockdep_init_map+0xe4/0x650 [ 24.314475] __rds_conn_create+0x112f/0x1b50 [ 24.318875] ? rds_conn_drop+0xb0/0xb0 [ 24.322744] ? __raw_spin_lock_init+0x1c/0x100 [ 24.327303] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.332298] ? __lockdep_init_map+0xe4/0x650 [ 24.336682] ? lockdep_init_map+0x9/0x10 [ 24.340715] ? __init_waitqueue_head+0x97/0x140 [ 24.345361] ? init_wait_entry+0x1b0/0x1b0 [ 24.349577] ? lockdep_init_map+0x9/0x10 [ 24.353621] ? rds_message_alloc+0x28c/0x330 [ 24.358005] ? rds_message_next_extension+0x210/0x210 [ 24.363168] ? trace_hardirqs_on+0xd/0x10 [ 24.367293] ? _raw_spin_unlock_bh+0x30/0x40 [ 24.371682] ? __release_sock+0x360/0x360 [ 24.375808] ? lock_sock_nested+0x91/0x110 [ 24.380019] rds_conn_create_outgoing+0x3f/0x50 [ 24.384663] rds_sendmsg+0xda3/0x2390 [ 24.388437] ? avc_has_perm+0x43e/0x680 [ 24.392396] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.396865] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.401335] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.406326] ? find_held_lock+0x35/0x1d0 [ 24.410369] ? sock_has_perm+0x2a4/0x420 [ 24.414407] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 24.419753] ? lock_release+0xa22/0xa40 [ 24.423700] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 24.429563] ? __check_object_size+0x8b/0x530 [ 24.434041] ? __might_sleep+0x95/0x190 [ 24.437993] ? selinux_socket_sendmsg+0x36/0x40 [ 24.442635] ? security_socket_sendmsg+0x89/0xb0 [ 24.447368] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.451839] sock_sendmsg+0xca/0x110 [ 24.455531] SYSC_sendto+0x361/0x5c0 [ 24.459221] ? SYSC_connect+0x4a0/0x4a0 [ 24.463173] ? find_held_lock+0x35/0x1d0 [ 24.467218] ? lock_downgrade+0x980/0x980 [ 24.471365] ? up_read+0x1a/0x40 [ 24.474704] ? __do_page_fault+0x3d6/0xc90 [ 24.478922] SyS_sendto+0x40/0x50 [ 24.482347] ? SyS_getpeername+0x30/0x30 [ 24.486382] do_fast_syscall_32+0x3ee/0xfa1 [ 24.490684] ? do_int80_syscall_32+0x9d0/0x9d0 [ 24.495241] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.499971] ? syscall_return_slowpath+0x550/0x550 [ 24.504874] ? syscall_return_slowpath+0x2ac/0x550 [ 24.509777] ? prepare_exit_to_usermode+0x350/0x350 [ 24.514776] ? retint_user+0x18/0x18 [ 24.518465] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.523288] entry_SYSENTER_compat+0x54/0x63 [ 24.527669] RIP: 0023:0xf7f0ac79 [ 24.531004] RSP: 002b:00000000ffe76c6c EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 24.538691] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020218000 [ 24.545934] RDX: 0000000000000000