[ 37.669250] audit: type=1800 audit(1582547921.998:33): pid=7358 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 37.696210] audit: type=1800 audit(1582547922.008:34): pid=7358 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 42.864602] random: sshd: uninitialized urandom read (32 bytes read) [ 43.116941] audit: type=1400 audit(1582547927.448:35): avc: denied { map } for pid=7530 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 [ 43.169002] random: sshd: uninitialized urandom read (32 bytes read) [ 43.947504] random: sshd: uninitialized urandom read (32 bytes read) [ 44.144349] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.183' (ECDSA) to the list of known hosts. [ 49.653177] random: sshd: uninitialized urandom read (32 bytes read) [ 49.774034] audit: type=1400 audit(1582547934.108:36): avc: denied { map } for pid=7543 comm="syz-executor990" path="/root/syz-executor990123831" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 50.031181] IPVS: ftp: loaded support on port[0] = 21 executing program [ 51.070074] [ 51.071716] ================================ [ 51.076101] WARNING: inconsistent lock state [ 51.080491] 4.14.171-syzkaller #0 Not tainted [ 51.084994] -------------------------------- [ 51.089375] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 51.095492] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 51.100752] (&(&local->client_conns_lock)->rlock){+.?.}, at: [] rxrpc_put_client_conn+0x538/0xaa0 [ 51.111466] {SOFTIRQ-ON-W} state was registered at: [ 51.116487] __lock_acquire+0xc33/0x4620 [ 51.120623] lock_acquire+0x16f/0x430 [ 51.124547] _raw_spin_lock+0x2f/0x40 [ 51.128440] rxrpc_connect_call+0x2f5/0x41a0 [ 51.132908] rxrpc_new_client_call+0x8f7/0x1420 [ 51.137639] rxrpc_do_sendmsg+0x92a/0x1109 [ 51.141944] rxrpc_sendmsg+0x4d1/0x610 [ 51.145910] sock_sendmsg+0xce/0x110 [ 51.149708] ___sys_sendmsg+0x349/0x840 [ 51.153739] __sys_sendmmsg+0x152/0x3a0 [ 51.157783] SyS_sendmmsg+0x35/0x60 [ 51.161487] do_syscall_64+0x1e8/0x640 [ 51.165436] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 51.170691] irq event stamp: 248068 [ 51.174319] hardirqs last enabled at (248068): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 51.184089] hardirqs last disabled at (248067): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 51.193430] softirqs last enabled at (248040): [] _local_bh_enable+0x1c/0x30 [ 51.202239] softirqs last disabled at (248041): [] irq_exit+0x160/0x1b0 [ 51.210522] [ 51.210522] other info that might help us debug this: [ 51.217159] Possible unsafe locking scenario: [ 51.217159] [ 51.223184] CPU0 [ 51.225736] ---- [ 51.228310] lock(&(&local->client_conns_lock)->rlock); [ 51.233764] [ 51.236495] lock(&(&local->client_conns_lock)->rlock); [ 51.242136] [ 51.242136] *** DEADLOCK *** [ 51.242136] [ 51.248183] 1 lock held by swapper/0/0: [ 51.252140] #0: (rcu_callback){....}, at: [] rcu_process_callbacks+0x893/0x12b0 [ 51.261312] [ 51.261312] stack backtrace: [ 51.265782] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.171-syzkaller #0 [ 51.272874] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.282217] Call Trace: [ 51.284777] [ 51.286916] dump_stack+0x142/0x197 [ 51.290537] print_usage_bug.cold+0x330/0x42a [ 51.295012] ? save_stack_trace+0x16/0x20 [ 51.299137] mark_lock+0xdbd/0x1240 [ 51.302739] ? check_usage_backwards+0x2f0/0x2f0 [ 51.307468] __lock_acquire+0xb57/0x4620 [ 51.311507] ? trace_hardirqs_on+0x10/0x10 [ 51.315720] ? trace_hardirqs_on+0x10/0x10 [ 51.319939] ? find_held_lock+0x35/0x130 [ 51.323980] ? trace_hardirqs_on+0x10/0x10 [ 51.328190] ? save_trace+0x290/0x290 [ 51.331966] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 51.337045] lock_acquire+0x16f/0x430 [ 51.340823] ? rxrpc_put_client_conn+0x538/0xaa0 [ 51.345558] _raw_spin_lock+0x2f/0x40 [ 51.349337] ? rxrpc_put_client_conn+0x538/0xaa0 [ 51.354114] rxrpc_put_client_conn+0x538/0xaa0 [ 51.358680] ? rxrpc_rcu_destroy_call+0x88/0x190 [ 51.363423] rxrpc_rcu_destroy_call+0x88/0x190 [ 51.367978] ? rxrpc_start_call_timer+0x200/0x200 [ 51.372807] rcu_process_callbacks+0x7b8/0x12b0 [ 51.377462] ? call_rcu_sched+0x20/0x20 [ 51.381427] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 51.386857] __do_softirq+0x244/0x9a0 [ 51.390634] ? sched_clock+0x2e/0x50 [ 51.394327] irq_exit+0x160/0x1b0 [ 51.397753] smp_apic_timer_interrupt+0x146/0x5e0 [ 51.402586] apic_timer_interrupt+0x96/0xa0 [ 51.406875] [ 51.409085] RIP: 0010:native_safe_halt+0xe/0x10 [ 51.413723] RSP: 0018:ffffffff87e07de8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 [ 51.421414] RAX: 1ffffffff0fe2ccc RBX: ffffffff87e76240 RCX: 0000000000000000 [ 51.428657] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff87e76abc [ 51.435913] RBP: ffffffff87e07e10 R08: 1ffffffff1163f01 R09: 0000000000000000 [ 51.443156] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87f16650 [ 51.450487] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87e76240 [ 51.457746] ? default_idle+0x4c/0x370 [ 51.461617] arch_cpu_idle+0xa/0x10 [ 51.465252] default_idle_call+0x36/0x90 [ 51.469296] do_idle+0x262/0x3d0 [ 51.472670] cpu_startup_entry+0x1b/0x20 [ 51.476707] rest_init+0x1d9/0x1e2 [ 51.480250] ? trace_event_define_fields_x86_irq_vector+0x2c/0x2c [ 51.486459] start_kernel+0x65f/0x67d [ 51.490238] ? mem_encrypt_init+0xb/0xb [ 51.494201] ? x86_family+0x32/0x40 [ 51.497822] ? load_ucode_bsp+0x1ea/0x1f6 [ 51.501974] x86_64_start_reservations+0x29/0x2b [ 51.506702] x86_64_start_kernel+0x77/0x7b [ 51.510992] secondary_startup_64+0xa5/0xb0