[ 46.871533] audit: type=1800 audit(1582321078.729:29): pid=8006 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 [ 46.909282] audit: type=1800 audit(1582321078.729:30): pid=8006 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 '10.128.15.212' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.084977] kauditd_printk_skb: 5 callbacks suppressed [ 55.084992] audit: type=1400 audit(1582321086.939:36): avc: denied { map } for pid=8191 comm="syz-executor348" path="/root/syz-executor348612103" 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 [ 55.098910] IPVS: ftp: loaded support on port[0] = 21 [ 55.189198] [ 55.190854] ================================ [ 55.195364] WARNING: inconsistent lock state [ 55.199757] 4.19.105-syzkaller #0 Not tainted [ 55.204233] -------------------------------- [ 55.208662] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 55.214800] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 55.220077] 0000000069c6d010 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 55.230401] {SOFTIRQ-ON-W} state was registered at: [ 55.235683] lock_acquire+0x16f/0x3f0 [ 55.239561] _raw_spin_lock+0x2f/0x40 [ 55.246252] rxrpc_connect_call+0x351/0x4920 [ 55.250867] rxrpc_new_client_call+0x8e7/0x1880 [ 55.255716] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 55.260039] rxrpc_sendmsg+0x4a0/0x5b0 [ 55.264127] sock_sendmsg+0xd7/0x130 [ 55.267951] ___sys_sendmsg+0x3e2/0x920 [ 55.272275] __sys_sendmmsg+0x1bf/0x4e0 [ 55.276334] __x64_sys_sendmmsg+0x9d/0x100 [ 55.280823] do_syscall_64+0xfd/0x620 [ 55.284746] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.290419] irq event stamp: 181288 [ 55.294036] hardirqs last enabled at (181288): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 55.305916] hardirqs last disabled at (181287): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 55.316686] softirqs last enabled at (181184): [] _local_bh_enable+0x1c/0x30 [ 55.326796] softirqs last disabled at (181185): [] irq_exit+0x180/0x1d0 [ 55.335557] [ 55.335557] other info that might help us debug this: [ 55.342304] Possible unsafe locking scenario: [ 55.342304] [ 55.348614] CPU0 [ 55.351198] ---- [ 55.353770] lock(&(&local->client_conns_lock)->rlock); [ 55.359223] [ 55.362080] lock(&(&local->client_conns_lock)->rlock); [ 55.367702] [ 55.367702] *** DEADLOCK *** [ 55.367702] [ 55.373756] 1 lock held by swapper/0/0: [ 55.377714] #0: 00000000733fc17d (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 55.386559] [ 55.386559] stack backtrace: [ 55.391106] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.105-syzkaller #0 [ 55.398300] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.408032] Call Trace: [ 55.410619] [ 55.412764] dump_stack+0x197/0x210 [ 55.416451] print_usage_bug.cold+0x330/0x42a [ 55.421075] ? save_stack_trace+0x1a/0x20 [ 55.425582] mark_lock+0xd1b/0x1370 [ 55.429227] ? check_usage_backwards+0x340/0x340 [ 55.434070] __lock_acquire+0xc62/0x49c0 [ 55.438133] ? mark_held_locks+0x100/0x100 [ 55.442361] ? save_stack+0x45/0xd0 [ 55.445974] ? __kasan_slab_free+0x102/0x150 [ 55.450376] ? kasan_slab_free+0xe/0x10 [ 55.454806] ? kfree+0xcf/0x220 [ 55.459299] ? mark_held_locks+0x100/0x100 [ 55.463546] ? find_held_lock+0x35/0x130 [ 55.467820] ? debug_object_deactivate+0x1e4/0x360 [ 55.472746] ? mark_held_locks+0x100/0x100 [ 55.477191] ? debug_object_deactivate+0x1e4/0x360 [ 55.482134] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 55.487238] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 55.491817] lock_acquire+0x16f/0x3f0 [ 55.495634] ? rxrpc_put_client_conn+0x683/0xc20 [ 55.500380] _raw_spin_lock+0x2f/0x40 [ 55.504175] ? rxrpc_put_client_conn+0x683/0xc20 [ 55.508924] rxrpc_put_client_conn+0x683/0xc20 [ 55.513501] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 55.518245] ? rxrpc_process_call.cold+0x20/0x20 [ 55.523002] rxrpc_rcu_destroy_call+0xbd/0x200 [ 55.527630] rcu_process_callbacks+0xba0/0x1a30 [ 55.532317] ? __rcu_read_unlock+0x170/0x170 [ 55.536765] __do_softirq+0x25c/0x921 [ 55.540568] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.546112] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.551644] irq_exit+0x180/0x1d0 [ 55.555111] smp_apic_timer_interrupt+0x13b/0x550 [ 55.559959] apic_timer_interrupt+0xf/0x20 [ 55.564176] [ 55.566423] RIP: 0010:native_safe_halt+0xe/0x10 [ 55.571130] 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 [ 55.590196] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 55.597901] RAX: 1ffffffff11e4ad4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 55.605173] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 55.612487] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 55.619777] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 55.627045] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 55.635975] ? default_idle+0x4e/0x320 [ 55.639854] arch_cpu_idle+0xa/0x10 [ 55.643466] default_idle_call+0x36/0x90 [ 55.647525] do_idle+0x30c/0x4d0 [ 55.650946] ? arch_cpu_idle_exit+0x80/0x80 [ 55.655263] ? check_preemption_disabled+0x48/0x290 [ 55.660291] cpu_startup_entry+0xc8/0xe0 [ 55.664349] ? cpu_in_idle+0x20/0x20 [ 55.668056] rest_init+0x219/0x222 [ 55.671599] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 55.678098] start_kernel+0x7ec/0x825 [ 55.681910] ? mem_encrypt_init+0xb/0xb [ 55.685891] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.691433] ? x86_family+0x41/0x50 [ 55.695051] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 55.700590] x86_64_start_reservations+0x29/0x2b [ 55.705335] x86_64_start_kernel+0x77/0x7b [ 55.709568] secondary_startup_64+0xa4/0xb0