[ 102.087994][ T27] audit: type=1800 audit(1581231568.128:36): pid=10497 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0
Starting mcstransd:
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
syzkaller login: [ 106.176815][ T27] kauditd_printk_skb: 4 callbacks suppressed
[ 106.176830][ T27] audit: type=1400 audit(1581231572.308:41): avc: denied { map } for pid=10673 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 '10.128.0.129' (ECDSA) to the list of known hosts.
executing program
[ 113.036846][ T27] audit: type=1400 audit(1581231579.168:42): avc: denied { map } for pid=10685 comm="syz-executor277" path="/root/syz-executor277372275" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[ 113.053491][T10686] IPVS: ftp: loaded support on port[0] = 21
[ 113.152297][ C0]
[ 113.155036][ C0] ================================
[ 113.160385][ C0] WARNING: inconsistent lock state
[ 113.165610][ C0] 5.5.0-syzkaller #0 Not tainted
[ 113.170592][ C0] --------------------------------
[ 113.175949][ C0] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[ 113.183403][ C0] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
[ 113.189835][ C0] ffff8880a86a41c8 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x6ed/0xc90
[ 113.202590][ C0] {SOFTIRQ-ON-W} state was registered at:
[ 113.208603][ C0] lock_acquire+0x190/0x410
[ 113.213535][ C0] _raw_spin_lock+0x2f/0x40
[ 113.218594][ C0] rxrpc_connect_call+0x358/0x4e30
[ 113.224162][ C0] rxrpc_new_client_call+0x9c0/0x1ad0
[ 113.229905][ C0] rxrpc_do_sendmsg+0xffa/0x1d5f
[ 113.234931][ C0] rxrpc_sendmsg+0x4d6/0x5f0
[ 113.239967][ C0] sock_sendmsg+0xd7/0x130
[ 113.245773][ C0] ____sys_sendmsg+0x358/0x880
[ 113.251781][ C0] ___sys_sendmsg+0x100/0x170
[ 113.257342][ C0] __sys_sendmmsg+0x1bf/0x4d0
[ 113.262114][ C0] __x64_sys_sendmmsg+0x9d/0x100
[ 113.267269][ C0] do_syscall_64+0xfa/0x790
[ 113.272010][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 113.278158][ C0] irq event stamp: 223526
[ 113.282983][ C0] hardirqs last enabled at (223526): [<ffffffff87edfb56>] _raw_spin_unlock_irqrestore+0x66/0xe0
[ 113.295036][ C0] hardirqs last disabled at (223525): [<ffffffff87edfecf>] _raw_spin_lock_irqsave+0x6f/0xcd
[ 113.305682][ C0] softirqs last enabled at (223430): [<ffffffff8147568c>] _local_bh_enable+0x1c/0x30
[ 113.316169][ C0] softirqs last disabled at (223431): [<ffffffff8147808b>] irq_exit+0x19b/0x1e0
[ 113.325427][ C0]
[ 113.325427][ C0] other info that might help us debug this:
[ 113.333875][ C0] Possible unsafe locking scenario:
[ 113.333875][ C0]
[ 113.341457][ C0] CPU0
[ 113.344843][ C0] ----
[ 113.349045][ C0] lock(&(&local->client_conns_lock)->rlock);
[ 113.355845][ C0] <Interrupt>
[ 113.359584][ C0] lock(&(&local->client_conns_lock)->rlock);
[ 113.366082][ C0]
[ 113.366082][ C0] *** DEADLOCK ***
[ 113.366082][ C0]
[ 113.374236][ C0] 1 lock held by swapper/0/0:
[ 113.379020][ C0] #0: ffffffff89bac140 (rcu_callback){....}, at: rcu_core+0x562/0x1390
[ 113.388177][ C0]
[ 113.388177][ C0] stack backtrace:
[ 113.396237][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-syzkaller #0
[ 113.403991][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 113.415013][ C0] Call Trace:
[ 113.418299][ C0] <IRQ>
[ 113.421192][ C0] dump_stack+0x197/0x210
[ 113.425627][ C0] print_usage_bug.cold+0x327/0x378
[ 113.431012][ C0] mark_lock+0xbb4/0x1220
[ 113.435573][ C0] ? kfree+0x10a/0x2c0
[ 113.440295][ C0] ? check_usage_backwards+0x330/0x330
[ 113.446497][ C0] ? __nf_hook_entries_free+0x31/0x40
[ 113.452302][ C0] __lock_acquire+0x1e8e/0x4a00
[ 113.457931][ C0] ? find_held_lock+0x35/0x130
[ 113.463219][ C0] ? __kasan_check_read+0x11/0x20
[ 113.468976][ C0] ? mark_lock+0xc2/0x1220
[ 113.474264][ C0] ? mark_held_locks+0xf0/0xf0
[ 113.479379][ C0] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 113.485215][ C0] lock_acquire+0x190/0x410
[ 113.490490][ C0] ? rxrpc_put_client_conn+0x6ed/0xc90
[ 113.496395][ C0] _raw_spin_lock+0x2f/0x40
[ 113.500889][ C0] ? rxrpc_put_client_conn+0x6ed/0xc90
[ 113.506932][ C0] rxrpc_put_client_conn+0x6ed/0xc90
[ 113.512343][ C0] ? rxrpc_rcu_destroy_call+0xbd/0x200
[ 113.518168][ C0] rxrpc_rcu_destroy_call+0xbd/0x200
[ 113.523874][ C0] rcu_core+0x5e1/0x1390
[ 113.528122][ C0] ? __rcu_read_unlock+0x700/0x700
[ 113.533336][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 113.538877][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 113.544858][ C0] ? run_rebalance_domains+0x227/0x2d0
[ 113.550609][ C0] rcu_core_si+0x9/0x10
[ 113.555138][ C0] __do_softirq+0x262/0x98c
[ 113.559646][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 113.564638][ C0] irq_exit+0x19b/0x1e0
[ 113.568990][ C0] smp_apic_timer_interrupt+0x1a3/0x610
[ 113.575052][ C0] apic_timer_interrupt+0xf/0x20
[ 113.580380][ C0] </IRQ>
[ 113.583322][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 113.588774][ C0] Code: 38 3e c6 f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 14 99 5a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 04 99 5a 00 fb f4 <c3> cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 4e f5 74 f9 e8 89
[ 113.608741][ C0] RSP: 0018:ffffffff89a07ce8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 113.617345][ C0] RAX: 1ffffffff1367612 RBX: ffffffff89a7a440 RCX: 0000000000000000
[ 113.625775][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff89a7acd4
[ 113.634407][ C0] RBP: ffffffff89a07d18 R08: ffffffff89a7a440 R09: 0000000000000000
[ 113.642474][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[ 113.650812][ C0] R13: ffffffff8aa587c0 R14: 0000000000000000 R15: 0000000000000000
[ 113.658970][ C0] ? default_idle+0x4e/0x360
[ 113.663725][ C0] arch_cpu_idle+0xa/0x10
[ 113.668064][ C0] default_idle_call+0x84/0xb0
[ 113.672940][ C0] do_idle+0x3c8/0x6e0
[ 113.677452][ C0] ? arch_cpu_idle_exit+0x80/0x80
[ 113.682734][ C0] ? trace_hardirqs_on+0x67/0x240
[ 113.687747][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 113.694342][ C0] ? debug_smp_processor_id+0x33/0x18a
[ 113.699795][ C0] cpu_startup_entry+0x1b/0x20
[ 113.704813][ C0] rest_init+0x23b/0x371
[ 113.709061][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[ 113.715299][ C0] arch_call_rest_init+0xe/0x1b
[ 113.720327][ C0] start_kernel+0x886/0x8c5
[ 113.725032][ C0] ? mem_encrypt_init+0xb/0xb
[ 113.729938][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 113.736173][ C0] ? x86_family+0x41/0x50
[ 113.740620][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 113.746916][ C0] x86_64_start_reservations+0x29/0x2b
[ 113.752534][ C0] x8