[ 35.088478] audit: type=1800 audit(1582546624.885:33): pid=7187 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 [ 35.115485] audit: type=1800 audit(1582546624.895:34): pid=7187 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: [ 37.345456] random: sshd: uninitialized urandom read (32 bytes read) [ 37.658177] audit: type=1400 audit(1582546627.455:35): avc: denied { map } for pid=7362 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 [ 37.749884] random: sshd: uninitialized urandom read (32 bytes read) [ 38.523713] random: sshd: uninitialized urandom read (32 bytes read) [ 47.466742] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.146' (ECDSA) to the list of known hosts. [ 53.133963] random: sshd: uninitialized urandom read (32 bytes read) [ 53.255474] audit: type=1400 audit(1582546643.055:36): avc: denied { map } for pid=7374 comm="syz-executor669" path="/root/syz-executor669420696" 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 [ 53.520910] IPVS: ftp: loaded support on port[0] = 21 executing program [ 54.350079] [ 54.351772] ================================ [ 54.356179] WARNING: inconsistent lock state [ 54.360564] 4.14.171-syzkaller #0 Not tainted [ 54.365037] -------------------------------- [ 54.369464] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 54.375659] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 54.380924] (&(&local->client_conns_lock)->rlock){+.?.}, at: [] rxrpc_put_client_conn+0x538/0xaa0 [ 54.391594] {SOFTIRQ-ON-W} state was registered at: [ 54.396621] __lock_acquire+0xc33/0x4620 [ 54.400778] lock_acquire+0x16f/0x430 [ 54.404701] _raw_spin_lock+0x2f/0x40 [ 54.408580] rxrpc_connect_call+0x2f5/0x41a0 [ 54.413065] rxrpc_new_client_call+0x8f7/0x1420 [ 54.417814] rxrpc_do_sendmsg+0x92a/0x1109 [ 54.422122] rxrpc_sendmsg+0x4d1/0x610 [ 54.426080] sock_sendmsg+0xce/0x110 [ 54.429867] ___sys_sendmsg+0x349/0x840 [ 54.433913] __sys_sendmmsg+0x152/0x3a0 [ 54.437957] SyS_sendmmsg+0x35/0x60 [ 54.441709] do_syscall_64+0x1e8/0x640 [ 54.445700] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 54.450963] irq event stamp: 204740 [ 54.454573] hardirqs last enabled at (204740): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.464397] hardirqs last disabled at (204739): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 54.473748] softirqs last enabled at (204722): [] _local_bh_enable+0x1c/0x30 [ 54.482594] softirqs last disabled at (204723): [] irq_exit+0x160/0x1b0 [ 54.490908] [ 54.490908] other info that might help us debug this: [ 54.497553] Possible unsafe locking scenario: [ 54.497553] [ 54.503590] CPU0 [ 54.506150] ---- [ 54.508710] lock(&(&local->client_conns_lock)->rlock); [ 54.514180] [ 54.516948] lock(&(&local->client_conns_lock)->rlock); [ 54.522597] [ 54.522597] *** DEADLOCK *** [ 54.522597] [ 54.528703] 1 lock held by swapper/1/0: [ 54.532702] #0: (rcu_callback){....}, at: [] rcu_process_callbacks+0x893/0x12b0 [ 54.541894] [ 54.541894] stack backtrace: [ 54.546382] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.14.171-syzkaller #0 [ 54.553471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.562853] Call Trace: [ 54.565456] [ 54.567594] dump_stack+0x142/0x197 [ 54.571350] print_usage_bug.cold+0x330/0x42a [ 54.575852] ? save_stack_trace+0x16/0x20 [ 54.579987] mark_lock+0xdbd/0x1240 [ 54.583643] ? check_usage_backwards+0x2f0/0x2f0 [ 54.588386] __lock_acquire+0xb57/0x4620 [ 54.592459] ? trace_hardirqs_on+0x10/0x10 [ 54.596682] ? trace_hardirqs_on+0x10/0x10 [ 54.600902] ? find_held_lock+0x35/0x130 [ 54.604960] ? trace_hardirqs_on+0x10/0x10 [ 54.609177] ? save_trace+0x290/0x290 [ 54.613005] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.618095] lock_acquire+0x16f/0x430 [ 54.621877] ? rxrpc_put_client_conn+0x538/0xaa0 [ 54.626626] _raw_spin_lock+0x2f/0x40 [ 54.630449] ? rxrpc_put_client_conn+0x538/0xaa0 [ 54.635226] rxrpc_put_client_conn+0x538/0xaa0 [ 54.639832] ? rxrpc_rcu_destroy_call+0x88/0x190 [ 54.644573] rxrpc_rcu_destroy_call+0x88/0x190 [ 54.649133] ? rxrpc_start_call_timer+0x200/0x200 [ 54.653958] rcu_process_callbacks+0x7b8/0x12b0 [ 54.658607] ? call_rcu_sched+0x20/0x20 [ 54.662627] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 54.668118] __do_softirq+0x244/0x9a0 [ 54.671950] ? sched_clock+0x2e/0x50 [ 54.675654] irq_exit+0x160/0x1b0 [ 54.679140] smp_apic_timer_interrupt+0x146/0x5e0 [ 54.684008] apic_timer_interrupt+0x96/0xa0 [ 54.688311] [ 54.690545] RIP: 0010:native_safe_halt+0xe/0x10 [ 54.695191] RSP: 0018:ffff8880a9d37e70 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 [ 54.702881] RAX: 1ffffffff0fe2ccc RBX: ffff8880a9d2a340 RCX: 0000000000000000 [ 54.710173] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880a9d2abbc [ 54.717427] RBP: ffff8880a9d37e98 R08: 1ffffffff1163f01 R09: 0000000000000000 [ 54.724714] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87f16650 [ 54.731971] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a9d2a340 [ 54.739241] ? default_idle+0x4c/0x370 [ 54.743120] arch_cpu_idle+0xa/0x10 [ 54.746730] default_idle_call+0x36/0x90 [ 54.75077