[ 87.801002][ T27] audit: type=1800 audit(1581061957.779:26): pid=9487 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 88.623968][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 88.623979][ T27] audit: type=1800 audit(1581061958.619:29): pid=9487 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 88.651043][ T27] audit: type=1800 audit(1581061958.619:30): pid=9487 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.47' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 97.510871][ T9640] IPVS: ftp: loaded support on port[0] = 21 [ 97.578563][ C0] [ 97.580945][ C0] ================================ [ 97.586035][ C0] WARNING: inconsistent lock state [ 97.591126][ C0] 5.5.0-syzkaller #0 Not tainted [ 97.596169][ C0] -------------------------------- [ 97.601263][ C0] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 97.608097][ C0] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 97.614482][ C0] ffff888097b2e9c8 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x6ed/0xc90 [ 97.625934][ C0] {SOFTIRQ-ON-W} state was registered at: [ 97.631636][ C0] lock_acquire+0x190/0x410 [ 97.636199][ C0] _raw_spin_lock+0x2f/0x40 [ 97.640777][ C0] rxrpc_connect_call+0x358/0x4e30 [ 97.645949][ C0] rxrpc_new_client_call+0x9c0/0x1ad0 [ 97.651380][ C0] rxrpc_do_sendmsg+0xffa/0x1d5f [ 97.656377][ C0] rxrpc_sendmsg+0x4d6/0x5f0 [ 97.661028][ C0] sock_sendmsg+0xd7/0x130 [ 97.665515][ C0] ____sys_sendmsg+0x358/0x880 [ 97.670337][ C0] ___sys_sendmsg+0x100/0x170 [ 97.675079][ C0] __sys_sendmmsg+0x1bf/0x4d0 [ 97.679835][ C0] __x64_sys_sendmmsg+0x9d/0x100 [ 97.684835][ C0] do_syscall_64+0xfa/0x790 [ 97.689401][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.695349][ C0] irq event stamp: 184936 [ 97.699667][ C0] hardirqs last enabled at (184936): [] _raw_spin_unlock_irqrestore+0x66/0xe0 [ 97.710138][ C0] hardirqs last disabled at (184935): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 97.720173][ C0] softirqs last enabled at (184860): [] _local_bh_enable+0x1c/0x30 [ 97.729685][ C0] softirqs last disabled at (184861): [] irq_exit+0x19b/0x1e0 [ 97.738669][ C0] [ 97.738669][ C0] other info that might help us debug this: [ 97.746699][ C0] Possible unsafe locking scenario: [ 97.746699][ C0] [ 97.754130][ C0] CPU0 [ 97.757383][ C0] ---- [ 97.760647][ C0] lock(&(&local->client_conns_lock)->rlock); [ 97.766782][ C0] [ 97.771266][ C0] lock(&(&local->client_conns_lock)->rlock); [ 97.777823][ C0] [ 97.777823][ C0] *** DEADLOCK *** [ 97.777823][ C0] [ 97.786549][ C0] 1 lock held by swapper/0/0: [ 97.791192][ C0] #0: ffffffff89bac140 (rcu_callback){....}, at: rcu_core+0x562/0x1390 [ 97.799499][ C0] [ 97.799499][ C0] stack backtrace: [ 97.805379][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-syzkaller #0 [ 97.813152][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.823190][ C0] Call Trace: [ 97.826455][ C0] [ 97.829291][ C0] dump_stack+0x197/0x210 [ 97.833600][ C0] print_usage_bug.cold+0x327/0x378 [ 97.838917][ C0] mark_lock+0xbb4/0x1220 [ 97.843252][ C0] ? kfree+0x10a/0x2c0 [ 97.847317][ C0] ? check_usage_backwards+0x330/0x330 [ 97.852759][ C0] ? __nf_hook_entries_free+0x31/0x40 [ 97.858114][ C0] __lock_acquire+0x1e8e/0x4a00 [ 97.863057][ C0] ? find_held_lock+0x35/0x130 [ 97.867824][ C0] ? __kasan_check_read+0x11/0x20 [ 97.872829][ C0] ? mark_lock+0xc2/0x1220 [ 97.877312][ C0] ? mark_held_locks+0xf0/0xf0 [ 97.882066][ C0] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 97.887856][ C0] lock_acquire+0x190/0x410 [ 97.892346][ C0] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 97.897783][ C0] _raw_spin_lock+0x2f/0x40 [ 97.902264][ C0] ? rxrpc_put_client_conn+0x6ed/0xc90 [ 97.907798][ C0] rxrpc_put_client_conn+0x6ed/0xc90 [ 97.913218][ C0] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 97.918654][ C0] rxrpc_rcu_destroy_call+0xbd/0x200 [ 97.923914][ C0] rcu_core+0x5e1/0x1390 [ 97.928133][ C0] ? __rcu_read_unlock+0x700/0x700 [ 97.933222][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 97.938744][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 97.944706][ C0] ? run_rebalance_domains+0x227/0x2d0 [ 97.950143][ C0] rcu_core_si+0x9/0x10 [ 97.954317][ C0] __do_softirq+0x262/0x98c [ 97.958794][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 97.963622][ C0] irq_exit+0x19b/0x1e0 [ 97.967755][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 97.973279][ C0] apic_timer_interrupt+0xf/0x20 [ 97.978188][ C0] [ 97.981107][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 97.986452][ C0] Code: 48 70 c7 f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 44 d3 5b 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 34 d3 5b 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 7e 2f 76 f9 e8 19 [ 98.006117][ C0] RSP: 0018:ffffffff89a07ce8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 98.014520][ C0] RAX: 1ffffffff1367612 RBX: ffffffff89a7a440 RCX: 0000000000000000 [ 98.022481][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff89a7acd4 [ 98.030426][ C0] RBP: ffffffff89a07d18 R08: ffffffff89a7a440 R09: 0000000000000000 [ 98.038385][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 98.046347][ C0] R13: ffffffff8aa522c0 R14: 0000000000000000 R15: 0000000000000000 [ 98.054325][ C0] ? default_idle+0x4e/0x360 [ 98.058909][ C0] arch_cpu_idle+0xa/0x10 [ 98.063238][ C0] default_idle_call+0x84/0xb0 [ 98.067999][ C0] do_idle+0x3c8/0x6e0 [ 98.072070][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 98.077264][ C0] ? trace_hardirqs_on+0x67/0x240 [ 98.082269][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.088488][ C0] ? debug_smp_processor_id+0x33/0x18a [ 98.093926][ C0] cpu_startup_entry+0x1b/0x20 [ 98.098669][ C0] rest_init+0x23b/0x371 [ 98.102894][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe [ 98.109108][ C0] arch_call_rest_init+0xe/0x1b [ 98.113937][ C0] start_kernel+0x886/0x8c5 [ 98.118418][ C0] ? mem_encrypt_init+0xb/0xb [ 98.123075][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.129402][ C0] ?