[ 42.698728] audit: type=1800 audit(1582126371.427:30): pid=8061 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 [ 42.741154] audit: type=1800 audit(1582126371.427:31): pid=8061 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.185' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.438529] kauditd_printk_skb: 4 callbacks suppressed [ 53.438544] audit: type=1400 audit(1582126382.207:36): avc: denied { map } for pid=8246 comm="syz-executor338" path="/root/syz-executor338875585" 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 [ 53.461156] IPVS: ftp: loaded support on port[0] = 21 [ 53.541085] [ 53.542752] ================================ [ 53.547317] WARNING: inconsistent lock state [ 53.551737] 4.19.104-syzkaller #0 Not tainted [ 53.556238] -------------------------------- [ 53.560649] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 53.567110] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 53.572704] 0000000004015518 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 53.584088] {SOFTIRQ-ON-W} state was registered at: [ 53.590592] lock_acquire+0x16f/0x3f0 [ 53.594649] _raw_spin_lock+0x2f/0x40 [ 53.598659] rxrpc_connect_call+0x351/0x4920 [ 53.603156] rxrpc_new_client_call+0x8e7/0x1880 [ 53.608982] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 53.613474] rxrpc_sendmsg+0x4a0/0x5b0 [ 53.617556] sock_sendmsg+0xd7/0x130 [ 53.621541] ___sys_sendmsg+0x3e2/0x920 [ 53.627146] __sys_sendmmsg+0x1bf/0x4e0 [ 53.631201] __x64_sys_sendmmsg+0x9d/0x100 [ 53.635820] do_syscall_64+0xfd/0x620 [ 53.639851] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.645251] irq event stamp: 178442 [ 53.648877] hardirqs last enabled at (178442): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.658690] hardirqs last disabled at (178441): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 53.668086] softirqs last enabled at (178334): [] _local_bh_enable+0x1c/0x30 [ 53.677898] softirqs last disabled at (178335): [] irq_exit+0x180/0x1d0 [ 53.688039] [ 53.688039] other info that might help us debug this: [ 53.695063] Possible unsafe locking scenario: [ 53.695063] [ 53.701762] CPU0 [ 53.704415] ---- [ 53.706988] lock(&(&local->client_conns_lock)->rlock); [ 53.712957] [ 53.715720] lock(&(&local->client_conns_lock)->rlock); [ 53.721358] [ 53.721358] *** DEADLOCK *** [ 53.721358] [ 53.727622] 1 lock held by swapper/0/0: [ 53.731690] #0: 00000000393585b9 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 53.740755] [ 53.740755] stack backtrace: [ 53.745272] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.104-syzkaller #0 [ 53.752726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.762290] Call Trace: [ 53.764871] [ 53.767034] dump_stack+0x197/0x210 [ 53.770760] print_usage_bug.cold+0x330/0x42a [ 53.775260] ? save_stack_trace+0x1a/0x20 [ 53.779416] mark_lock+0xd1b/0x1370 [ 53.783186] ? check_usage_backwards+0x340/0x340 [ 53.788029] __lock_acquire+0xc62/0x49c0 [ 53.792093] ? mark_held_locks+0x100/0x100 [ 53.796419] ? save_stack+0x45/0xd0 [ 53.800063] ? __kasan_slab_free+0x102/0x150 [ 53.804482] ? kasan_slab_free+0xe/0x10 [ 53.808441] ? kfree+0xcf/0x220 [ 53.811721] ? mark_held_locks+0x100/0x100 [ 53.815954] ? find_held_lock+0x35/0x130 [ 53.820017] ? debug_object_deactivate+0x1e4/0x360 [ 53.824947] ? mark_held_locks+0x100/0x100 [ 53.829170] ? debug_object_deactivate+0x1e4/0x360 [ 53.834099] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.839302] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 53.843932] lock_acquire+0x16f/0x3f0 [ 53.847721] ? rxrpc_put_client_conn+0x683/0xc20 [ 53.852562] _raw_spin_lock+0x2f/0x40 [ 53.856377] ? rxrpc_put_client_conn+0x683/0xc20 [ 53.861143] rxrpc_put_client_conn+0x683/0xc20 [ 53.865821] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 53.870585] ? rxrpc_process_call.cold+0x20/0x20 [ 53.875605] rxrpc_rcu_destroy_call+0xbd/0x200 [ 53.880324] rcu_process_callbacks+0xba0/0x1a30 [ 53.885093] ? __rcu_read_unlock+0x170/0x170 [ 53.889504] __do_softirq+0x25c/0x921 [ 53.893297] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.898909] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.904460] irq_exit+0x180/0x1d0 [ 53.907925] smp_apic_timer_interrupt+0x13b/0x550 [ 53.912764] apic_timer_interrupt+0xf/0x20 [ 53.916989] [ 53.919218] RIP: 0010:native_safe_halt+0xe/0x10 [ 53.923977] 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 [ 53.943222] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 53.950929] RAX: 1ffffffff11e4ad4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 53.958325] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 53.965596] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 53.972960] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 53.981073] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 53.990616] ? default_idle+0x4e/0x320 [ 53.994715] arch_cpu_idle+0xa/0x10 [ 53.998589] default_idle_call+0x36/0x90 [ 54.002658] do_idle+0x30c/0x4d0 [ 54.006044] ? arch_cpu_idle_exit+0x80/0x80 [ 54.010512] ? check_preemption_disabled+0x48/0x290 [ 54.015532] cpu_startup_entry+0xc8/0xe0 [ 54.019755] ? cpu_in_idle+0x20/0x20 [ 54.023584] rest_init+0x219/0x222 [ 54.027149] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 54.033922] start_kernel+0x7ec/0x825 [ 54.038163] ? mem_encrypt_init+0xb/0xb [ 54.042220