[ 43.546137] audit: type=1800 audit(1582127774.448:30): pid=7893 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
Starting mcstransd:
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
syzkaller login: [ 47.503902] kauditd_printk_skb: 4 callbacks suppressed
[ 47.503917] audit: type=1400 audit(1582127778.448:35): avc: denied { map } for pid=8066 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 '10.128.0.135' (ECDSA) to the list of known hosts.
executing program
[ 54.282317] audit: type=1400 audit(1582127785.228:36): avc: denied { map } for pid=8078 comm="syz-executor282" path="/root/syz-executor282635172" 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
[ 54.297472] IPVS: ftp: loaded support on port[0] = 21
[ 54.378764]
[ 54.380408] ================================
[ 54.384790] WARNING: inconsistent lock state
[ 54.389176] 4.19.104-syzkaller #0 Not tainted
[ 54.393681] --------------------------------
[ 54.398079] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[ 54.404205] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
[ 54.409459] 0000000057eccb65 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20
[ 54.419835] {SOFTIRQ-ON-W} state was registered at:
[ 54.424841] lock_acquire+0x16f/0x3f0
[ 54.428718] _raw_spin_lock+0x2f/0x40
[ 54.432600] rxrpc_connect_call+0x351/0x4920
[ 54.437190] rxrpc_new_client_call+0x8e7/0x1880
[ 54.441931] rxrpc_do_sendmsg+0xfc3/0x1ca3
[ 54.446234] rxrpc_sendmsg+0x4a0/0x5b0
[ 54.450237] sock_sendmsg+0xd7/0x130
[ 54.454020] ___sys_sendmsg+0x3e2/0x920
[ 54.458096] __sys_sendmmsg+0x1bf/0x4e0
[ 54.462142] __x64_sys_sendmmsg+0x9d/0x100
[ 54.466452] do_syscall_64+0xfd/0x620
[ 54.470327] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 54.475606] irq event stamp: 157808
[ 54.479230] hardirqs last enabled at (157808): [<ffffffff87549a3b>] _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 54.489017] hardirqs last disabled at (157807): [<ffffffff87549ccf>] _raw_spin_lock_irqsave+0x6f/0xcd
[ 54.498401] softirqs last enabled at (157708): [<ffffffff813fdc3c>] _local_bh_enable+0x1c/0x30
[ 54.507356] softirqs last disabled at (157709): [<ffffffff814007c0>] irq_exit+0x180/0x1d0
[ 54.515651]
[ 54.515651] other info that might help us debug this:
[ 54.522296] Possible unsafe locking scenario:
[ 54.522296]
[ 54.528343] CPU0
[ 54.530907] ----
[ 54.533466] lock(&(&local->client_conns_lock)->rlock);
[ 54.538896] <Interrupt>
[ 54.541629] lock(&(&local->client_conns_lock)->rlock);
[ 54.547229]
[ 54.547229] *** DEADLOCK ***
[ 54.547229]
[ 54.553267] 1 lock held by swapper/1/0:
[ 54.557218] #0: 00000000df626414 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30
[ 54.565971]
[ 54.565971] stack backtrace:
[ 54.570459] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.104-syzkaller #0
[ 54.577904] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 54.587242] Call Trace:
[ 54.589810] <IRQ>
[ 54.591968] dump_stack+0x197/0x210
[ 54.595583] print_usage_bug.cold+0x330/0x42a
[ 54.600071] ? save_stack_trace+0x1a/0x20
[ 54.604203] mark_lock+0xd1b/0x1370
[ 54.607861] ? check_usage_backwards+0x340/0x340
[ 54.612619] __lock_acquire+0xc62/0x49c0
[ 54.617064] ? mark_held_locks+0x100/0x100
[ 54.621290] ? save_stack+0x45/0xd0
[ 54.624901] ? __kasan_slab_free+0x102/0x150
[ 54.629302] ? kasan_slab_free+0xe/0x10
[ 54.633264] ? kfree+0xcf/0x220
[ 54.636541] ? mark_held_locks+0x100/0x100
[ 54.640760] ? find_held_lock+0x35/0x130
[ 54.644823] ? debug_object_deactivate+0x1e4/0x360
[ 54.649749] ? mark_held_locks+0x100/0x100
[ 54.654153] ? debug_object_deactivate+0x1e4/0x360
[ 54.659076] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 54.664230] ? lockdep_hardirqs_on+0x19b/0x5d0
[ 54.668803] lock_acquire+0x16f/0x3f0
[ 54.672652] ? rxrpc_put_client_conn+0x683/0xc20
[ 54.677411] _raw_spin_lock+0x2f/0x40
[ 54.681205] ? rxrpc_put_client_conn+0x683/0xc20
[ 54.685969] rxrpc_put_client_conn+0x683/0xc20
[ 54.690578] ? rxrpc_rcu_destroy_call+0xbd/0x200
[ 54.695356] ? rxrpc_process_call.cold+0x20/0x20
[ 54.700111] rxrpc_rcu_destroy_call+0xbd/0x200
[ 54.704735] rcu_process_callbacks+0xba0/0x1a30
[ 54.709400] ? __rcu_read_unlock+0x170/0x170
[ 54.713808] __do_softirq+0x25c/0x921
[ 54.717595] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 54.723124] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 54.728666] irq_exit+0x180/0x1d0
[ 54.732125] smp_apic_timer_interrupt+0x13b/0x550
[ 54.736965] apic_timer_interrupt+0xf/0x20
[ 54.741222] </IRQ>
[ 54.743459] RIP: 0010:native_safe_halt+0xe/0x10
[ 54.748120] Code: ff ff 48 89 df e8 92 f8 4d fa eb 82 e9 07 00 00 00 0f 00 2d 74 61 53 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 64 61 53 00 fb f4 <c3> 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be cc 04 fa e8 d9
[ 54.767139] RSP: 0018:ffff8880aa3b7d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 54.774846] RAX: 1ffffffff11e4ad4 RBX: ffff8880aa3a43c0 RCX: 0000000000000000
[ 54.782238] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa3a4c3c
[ 54.789542] RBP: ffff8880aa3b7d38 R08: ffff8880aa3a43c0 R09: 0000000000000000
[ 54.796843] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
[ 54.804236] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffff8880aa3a43c0
[ 54.811513] ? default_idle+0x4e/0x320
[ 54.815407] arch_cpu_idle+0xa/0x10
[ 54.819022] default_idle_call+0x36/0x90
[ 54.823084] do_idle+0x30c/0x4d0
[ 54.826446] ? trace_hardirqs_on+0x67/0x220
[ 54.830756] ? arch_cpu_idle_exit+0x80/0x80
[ 54.835072] ? _raw_spin_unlock_irqrestore+0xa4/0xe0
[ 54.840216] ? complete+0x61/0x80
[ 54.843668] cpu_startup_entry+0xc8/0xe0
[ 54.847720] ? cpu_in_idle+0x20/0x20
[ 54.851472] ? setup_APIC_timer+0x1aa/0x200
[ 54.855921] start_secondary+0x3e8/0x5b0
[ 54.859985] ? set_cpu_sibling_map+0x1860/0x1860
[ 54.864739] secondary_startup_64+0xa4/0xb0