[ 42.411531] audit: type=1800 audit(1582149118.491:30): pid=7970 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: [ 46.928264] kauditd_printk_skb: 4 callbacks suppressed [ 46.928280] audit: type=1400 audit(1582149123.031:35): avc: denied { map } for pid=8146 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 '10.128.0.34' (ECDSA) to the list of known hosts. executing program [ 53.696999] audit: type=1400 audit(1582149129.801:36): avc: denied { map } for pid=8158 comm="syz-executor297" path="/root/syz-executor297153643" 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 [ 53.712953] IPVS: ftp: loaded support on port[0] = 21 [ 53.793839] [ 53.795493] ================================ [ 53.799876] WARNING: inconsistent lock state [ 53.804311] 4.19.105-syzkaller #0 Not tainted [ 53.808797] -------------------------------- [ 53.813196] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 53.819335] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 53.824596] 0000000069b56532 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 53.834829] {SOFTIRQ-ON-W} state was registered at: [ 53.839845] lock_acquire+0x16f/0x3f0 [ 53.843814] _raw_spin_lock+0x2f/0x40 [ 53.847718] rxrpc_connect_call+0x351/0x4920 [ 53.852212] rxrpc_new_client_call+0x8e7/0x1880 [ 53.856970] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 53.861274] rxrpc_sendmsg+0x4a0/0x5b0 [ 53.865242] sock_sendmsg+0xd7/0x130 [ 53.869035] ___sys_sendmsg+0x3e2/0x920 [ 53.873091] __sys_sendmmsg+0x1bf/0x4e0 [ 53.877139] __x64_sys_sendmmsg+0x9d/0x100 [ 53.881461] do_syscall_64+0xfd/0x620 [ 53.885391] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.890646] irq event stamp: 189244 [ 53.894257] hardirqs last enabled at (189244): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.904271] hardirqs last disabled at (189243): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 53.913646] softirqs last enabled at (189120): [] _local_bh_enable+0x1c/0x30 [ 53.922482] softirqs last disabled at (189121): [] irq_exit+0x180/0x1d0 [ 53.930792] [ 53.930792] other info that might help us debug this: [ 53.937445] Possible unsafe locking scenario: [ 53.937445] [ 53.943486] CPU0 [ 53.946121] ---- [ 53.948688] lock(&(&local->client_conns_lock)->rlock); [ 53.954157] [ 53.956917] lock(&(&local->client_conns_lock)->rlock); [ 53.962528] [ 53.962528] *** DEADLOCK *** [ 53.962528] [ 53.968576] 1 lock held by swapper/0/0: [ 53.972605] #0: 00000000c9be7e15 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 53.981452] [ 53.981452] stack backtrace: [ 53.985942] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.105-syzkaller #0 [ 53.994417] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.003774] Call Trace: [ 54.006354] [ 54.008498] dump_stack+0x197/0x210 [ 54.012125] print_usage_bug.cold+0x330/0x42a [ 54.016699] ? save_stack_trace+0x1a/0x20 [ 54.020848] mark_lock+0xd1b/0x1370 [ 54.024511] ? check_usage_backwards+0x340/0x340 [ 54.029253] __lock_acquire+0xc62/0x49c0 [ 54.033309] ? mark_held_locks+0x100/0x100 [ 54.037537] ? save_stack+0x45/0xd0 [ 54.041270] ? __kasan_slab_free+0x102/0x150 [ 54.045671] ? kasan_slab_free+0xe/0x10 [ 54.049635] ? kfree+0xcf/0x220 [ 54.052921] ? mark_held_locks+0x100/0x100 [ 54.057148] ? find_held_lock+0x35/0x130 [ 54.061204] ? debug_object_deactivate+0x1e4/0x360 [ 54.066246] ? mark_held_locks+0x100/0x100 [ 54.070476] ? debug_object_deactivate+0x1e4/0x360 [ 54.075399] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.080500] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 54.085158] lock_acquire+0x16f/0x3f0 [ 54.088947] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.093688] _raw_spin_lock+0x2f/0x40 [ 54.097483] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.102225] rxrpc_put_client_conn+0x683/0xc20 [ 54.106901] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.111697] ? rxrpc_process_call.cold+0x20/0x20 [ 54.116447] rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.121054] rcu_process_callbacks+0xba0/0x1a30 [ 54.126808] ? __rcu_read_unlock+0x170/0x170 [ 54.131217] __do_softirq+0x25c/0x921 [ 54.135011] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.140538] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.146075] irq_exit+0x180/0x1d0 [ 54.150349] smp_apic_timer_interrupt+0x13b/0x550 [ 54.155179] apic_timer_interrupt+0xf/0x20 [ 54.159445] [ 54.161679] RIP: 0010:native_safe_halt+0xe/0x10 [ 54.166816] 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 [ 54.186556] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 54.194260] RAX: 1ffffffff11e4ad4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 54.201671] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 54.208932] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 54.216458] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 54.223816] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 54.231180] ? default_idle+0x4e/0x320 [ 54.235114] arch_cpu_idle+0xa/0x10 [ 54.238736] default_idle_call+0x36/0x90 [ 54.242786] do_idle+0x30c/0x4d0 [ 54.246141] ? arch_cpu_idle_exit+0x80/0x80 [ 54.252484] ? check_preemption_disabled+0x48/0x290 [ 54.257502] cpu_startup_entry+0xc8/0xe0 [ 54.261562] ? cpu_in_idle+0x20/0x20 [ 54.265532] rest_init+0x219/0x222 [ 54.269086] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 54.275575] start_kernel+0x7ec/0x825 [ 54.279411] ? mem_encrypt_init+0xb/0xb [ 54.283398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.289057] ? x86_family+0x41/0x50 [ 54.293040] ? __sanitizer_cov_tr