[ 45.177977] audit: type=1800 audit(1582089231.235:29): pid=8120 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 45.204837] audit: type=1800 audit(1582089231.245:30): pid=8120 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 periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.315647] kauditd_printk_skb: 5 callbacks suppressed [ 53.315664] audit: type=1400 audit(1582089239.375:36): avc: denied { map } for pid=8306 comm="syz-executor525" path="/root/syz-executor525730957" 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 [ 53.330136] IPVS: ftp: loaded support on port[0] = 21 [ 53.421309] [ 53.422959] ================================ [ 53.427357] WARNING: inconsistent lock state [ 53.431752] 4.19.104-syzkaller #0 Not tainted [ 53.436227] -------------------------------- [ 53.440620] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 53.446814] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 53.452182] 0000000030bb1ef1 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 53.462412] {SOFTIRQ-ON-W} state was registered at: [ 53.467425] lock_acquire+0x16f/0x3f0 [ 53.471300] _raw_spin_lock+0x2f/0x40 [ 53.475205] rxrpc_connect_call+0x351/0x4920 [ 53.479694] rxrpc_new_client_call+0x8e7/0x1880 [ 53.484442] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 53.488786] rxrpc_sendmsg+0x4a0/0x5b0 [ 53.492755] sock_sendmsg+0xd7/0x130 [ 53.496555] ___sys_sendmsg+0x3e2/0x920 [ 53.500611] __sys_sendmmsg+0x1bf/0x4e0 [ 53.504694] __x64_sys_sendmmsg+0x9d/0x100 [ 53.509094] do_syscall_64+0xfd/0x620 [ 53.512971] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.518231] irq event stamp: 165722 [ 53.521898] hardirqs last enabled at (165722): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.531691] hardirqs last disabled at (165721): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 53.541053] softirqs last enabled at (165626): [] _local_bh_enable+0x1c/0x30 [ 53.549905] softirqs last disabled at (165627): [] irq_exit+0x180/0x1d0 [ 53.558207] [ 53.558207] other info that might help us debug this: [ 53.564901] Possible unsafe locking scenario: [ 53.564901] [ 53.570940] CPU0 [ 53.573511] ---- [ 53.576080] lock(&(&local->client_conns_lock)->rlock); [ 53.581517] [ 53.584268] lock(&(&local->client_conns_lock)->rlock); [ 53.589880] [ 53.589880] *** DEADLOCK *** [ 53.589880] [ 53.595932] 1 lock held by swapper/1/0: [ 53.599903] #0: 0000000079b0c71d (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 53.608662] [ 53.608662] stack backtrace: [ 53.613163] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.104-syzkaller #0 [ 53.620250] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.629956] Call Trace: [ 53.632529] [ 53.634673] dump_stack+0x197/0x210 [ 53.638303] print_usage_bug.cold+0x330/0x42a [ 53.642794] ? save_stack_trace+0x1a/0x20 [ 53.646959] mark_lock+0xd1b/0x1370 [ 53.650590] ? check_usage_backwards+0x340/0x340 [ 53.655349] __lock_acquire+0xc62/0x49c0 [ 53.659406] ? mark_held_locks+0x100/0x100 [ 53.663627] ? save_stack+0x45/0xd0 [ 53.667257] ? __kasan_slab_free+0x102/0x150 [ 53.671657] ? kasan_slab_free+0xe/0x10 [ 53.675674] ? kfree+0xcf/0x220 [ 53.678952] ? mark_held_locks+0x100/0x100 [ 53.683174] ? find_held_lock+0x35/0x130 [ 53.687236] ? debug_object_deactivate+0x1e4/0x360 [ 53.692163] ? mark_held_locks+0x100/0x100 [ 53.696398] ? debug_object_deactivate+0x1e4/0x360 [ 53.701476] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.706580] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 53.711205] lock_acquire+0x16f/0x3f0 [ 53.715005] ? rxrpc_put_client_conn+0x683/0xc20 [ 53.719756] _raw_spin_lock+0x2f/0x40 [ 53.723544] ? rxrpc_put_client_conn+0x683/0xc20 [ 53.728473] rxrpc_put_client_conn+0x683/0xc20 [ 53.733091] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 53.737833] ? rxrpc_process_call.cold+0x20/0x20 [ 53.742692] rxrpc_rcu_destroy_call+0xbd/0x200 [ 53.747287] rcu_process_callbacks+0xba0/0x1a30 [ 53.751952] ? __rcu_read_unlock+0x170/0x170 [ 53.756368] __do_softirq+0x25c/0x921 [ 53.760167] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.765698] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.771240] irq_exit+0x180/0x1d0 [ 53.774705] smp_apic_timer_interrupt+0x13b/0x550 [ 53.779546] apic_timer_interrupt+0xf/0x20 [ 53.783761] [ 53.786023] RIP: 0010:native_safe_halt+0xe/0x10 [ 53.790688] 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 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be cc 04 fa e8 d9 [ 53.809585] RSP: 0018:ffff8880aa3b7d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 53.817332] RAX: 1ffffffff11e4ad4 RBX: ffff8880aa3a43c0 RCX: 0000000000000000 [ 53.824596] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa3a4c3c [ 53.831880] RBP: ffff8880aa3b7d38 R08: ffff8880aa3a43c0 R09: 0000000000000000 [ 53.839148] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 53.846475] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffff8880aa3a43c0 [ 53.853794] ? default_idle+0x4e/0x320 [ 53.857740] arch_cpu_idle+0xa/0x10 [ 53.861465] default_idle_call+0x36/0x90 [ 53.865582] do_idle+0x30c/0x4d0 [ 53.868950] ? trace_hardirqs_on+0x67/0x220 [ 53.873266] ? arch_cpu_idle_exit+0x80/0x80 [ 53.877611] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 53.882718] ? complete+0x61/0x80 [ 53.886178] cpu_startup_entry+0xc8/0xe0 [ 53.890253] ? cpu_in_idle+0x20/0x20 [ 53.893973] ? setup_APIC_timer+0x1aa/0x200 [ 53.898299] start_secondary+0x3e8/0x5b0 [ 53.902356] ? set_cpu_sibling_map+0x1860/0x1860 [ 53.907100] secondary_startup_64+0xa4/0xb0