[ 41.942206] audit: type=1800 audit(1582212232.514:30): pid=7931 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 syzkaller login: [ 47.255176] kauditd_printk_skb: 4 callbacks suppressed [ 47.255190] audit: type=1400 audit(1582212237.874:35): avc: denied { map } for pid=8107 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 '10.128.10.18' (ECDSA) to the list of known hosts. executing program [ 53.987175] audit: type=1400 audit(1582212244.604:36): avc: denied { map } for pid=8119 comm="syz-executor803" path="/root/syz-executor803865208" 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 [ 54.009757] IPVS: ftp: loaded support on port[0] = 21 [ 54.080892] [ 54.082561] ================================ [ 54.086949] WARNING: inconsistent lock state [ 54.091342] 4.19.105-syzkaller #0 Not tainted [ 54.095819] -------------------------------- [ 54.100221] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 54.106359] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 54.111648] 00000000a26057e9 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 54.121891] {SOFTIRQ-ON-W} state was registered at: [ 54.126908] lock_acquire+0x16f/0x3f0 [ 54.130791] _raw_spin_lock+0x2f/0x40 [ 54.134689] rxrpc_connect_call+0x351/0x4920 [ 54.139170] rxrpc_new_client_call+0x8e7/0x1880 [ 54.143931] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 54.148355] rxrpc_sendmsg+0x4a0/0x5b0 [ 54.152319] sock_sendmsg+0xd7/0x130 [ 54.156119] ___sys_sendmsg+0x3e2/0x920 [ 54.160167] __sys_sendmmsg+0x1bf/0x4e0 [ 54.164216] __x64_sys_sendmmsg+0x9d/0x100 [ 54.168537] do_syscall_64+0xfd/0x620 [ 54.172530] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.177839] irq event stamp: 170842 [ 54.181462] hardirqs last enabled at (170842): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.191256] hardirqs last disabled at (170841): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 54.200620] softirqs last enabled at (170732): [] _local_bh_enable+0x1c/0x30 [ 54.209475] softirqs last disabled at (170733): [] irq_exit+0x180/0x1d0 [ 54.217880] [ 54.217880] other info that might help us debug this: [ 54.224624] Possible unsafe locking scenario: [ 54.224624] [ 54.230675] CPU0 [ 54.233249] ---- [ 54.235949] lock(&(&local->client_conns_lock)->rlock); [ 54.241523] [ 54.244379] lock(&(&local->client_conns_lock)->rlock); [ 54.250028] [ 54.250028] *** DEADLOCK *** [ 54.250028] [ 54.256093] 1 lock held by swapper/0/0: [ 54.260075] #0: 00000000b615ff74 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 54.268960] [ 54.268960] stack backtrace: [ 54.273460] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.105-syzkaller #0 [ 54.280552] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.290277] Call Trace: [ 54.292882] [ 54.295253] dump_stack+0x197/0x210 [ 54.298914] print_usage_bug.cold+0x330/0x42a [ 54.303417] ? save_stack_trace+0x1a/0x20 [ 54.307579] mark_lock+0xd1b/0x1370 [ 54.311198] ? check_usage_backwards+0x340/0x340 [ 54.315967] __lock_acquire+0xc62/0x49c0 [ 54.320366] ? mark_held_locks+0x100/0x100 [ 54.324659] ? __kasan_slab_free+0x102/0x150 [ 54.329160] ? kasan_slab_free+0xe/0x10 [ 54.333281] ? kmem_cache_free+0x86/0x260 [ 54.337430] ? put_cred_rcu+0x2b6/0x4b0 [ 54.341625] ? mark_held_locks+0x100/0x100 [ 54.345866] ? find_held_lock+0x35/0x130 [ 54.349952] ? debug_object_deactivate+0x1e4/0x360 [ 54.354886] ? mark_held_locks+0x100/0x100 [ 54.359127] ? debug_object_deactivate+0x1e4/0x360 [ 54.364247] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.369402] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 54.374013] lock_acquire+0x16f/0x3f0 [ 54.377822] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.382570] _raw_spin_lock+0x2f/0x40 [ 54.386373] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.391139] rxrpc_put_client_conn+0x683/0xc20 [ 54.395773] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.400676] ? rxrpc_process_call.cold+0x20/0x20 [ 54.405423] rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.410013] rcu_process_callbacks+0xba0/0x1a30 [ 54.414681] ? __rcu_read_unlock+0x170/0x170 [ 54.419101] __do_softirq+0x25c/0x921 [ 54.422892] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.428449] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.433996] irq_exit+0x180/0x1d0 [ 54.437458] smp_apic_timer_interrupt+0x13b/0x550 [ 54.442321] apic_timer_interrupt+0xf/0x20 [ 54.446544] [ 54.448788] RIP: 0010:native_safe_halt+0xe/0x10 [ 54.453639] 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 [ 54.473159] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 54.480984] RAX: 1ffffffff11e4ad4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 54.488268] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 54.495539] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 54.502811] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 54.510080] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 54.517390] ? default_idle+0x4e/0x320 [ 54.521264] arch_cpu_idle+0xa/0x10 [ 54.524892] default_idle_call+0x36/0x90 [ 54.528949] do_idle+0x30c/0x4d0 [ 54.532349] ? arch_cpu_idle_exit+0x80/0x80 [ 54.536671] ? check_preemption_disabled+0x48/0x290 [ 54.541695] cpu_startup_entry+0xc8/0xe0 [ 54.545747] ? cpu_in_idle+0x20/0x20 [ 54.549468] rest_init+0x219/0x222 [ 54.553018] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 54.559512] start_kernel+0x7ec/0x825 [ 54.563317] ? mem_encrypt_init+0xb/0xb [ 54.567326] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.572930] ? x86_family+0x41/0x50 [ 54.576635] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 54.582173] x86_64_start_reservations+0x29/0x2b [ 54.586950] x86_64_start_kernel+0x77/0x7b [ 54.591287] secondary_startup_64+0xa4/0xb0