[ 43.312290] audit: type=1800 audit(1582549723.164:29): pid=8036 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 [ 43.352941] audit: type=1800 audit(1582549723.174:30): pid=8036 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.137849] kauditd_printk_skb: 5 callbacks suppressed [ 53.137865] audit: type=1400 audit(1582549732.994:36): avc: denied { map } for pid=8221 comm="syz-executor367" path="/root/syz-executor367822848" 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 [ 53.153234] IPVS: ftp: loaded support on port[0] = 21 [ 53.234209] [ 53.235876] ================================ [ 53.240398] WARNING: inconsistent lock state [ 53.244792] 4.19.106-syzkaller #0 Not tainted [ 53.249265] -------------------------------- [ 53.253653] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 53.259790] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 53.265049] 00000000bea8e786 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 53.275280] {SOFTIRQ-ON-W} state was registered at: [ 53.280284] lock_acquire+0x16f/0x3f0 [ 53.284180] _raw_spin_lock+0x2f/0x40 [ 53.288101] rxrpc_connect_call+0x351/0x4920 [ 53.292592] rxrpc_new_client_call+0x8e7/0x1880 [ 53.297345] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 53.301653] rxrpc_sendmsg+0x4a0/0x5b0 [ 53.305626] sock_sendmsg+0xd7/0x130 [ 53.309450] ___sys_sendmsg+0x3e2/0x920 [ 53.313548] __sys_sendmmsg+0x1bf/0x4e0 [ 53.317639] __x64_sys_sendmmsg+0x9d/0x100 [ 53.321952] do_syscall_64+0xfd/0x620 [ 53.325878] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.331143] irq event stamp: 183648 [ 53.334770] hardirqs last enabled at (183648): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.344600] hardirqs last disabled at (183647): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 53.354005] softirqs last enabled at (183524): [] _local_bh_enable+0x1c/0x30 [ 53.362924] softirqs last disabled at (183525): [] irq_exit+0x180/0x1d0 [ 53.371229] [ 53.371229] other info that might help us debug this: [ 53.377875] Possible unsafe locking scenario: [ 53.377875] [ 53.383972] CPU0 [ 53.386538] ---- [ 53.389105] lock(&(&local->client_conns_lock)->rlock); [ 53.394572] [ 53.397311] lock(&(&local->client_conns_lock)->rlock); [ 53.402916] [ 53.402916] *** DEADLOCK *** [ 53.402916] [ 53.408965] 1 lock held by swapper/0/0: [ 53.412939] #0: 0000000087ae79ae (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 53.421800] [ 53.421800] stack backtrace: [ 53.426290] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.106-syzkaller #0 [ 53.433418] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.442812] Call Trace: [ 53.445379] [ 53.447660] dump_stack+0x197/0x210 [ 53.451331] print_usage_bug.cold+0x330/0x42a [ 53.455811] ? save_stack_trace+0x1a/0x20 [ 53.459942] mark_lock+0xd1b/0x1370 [ 53.463556] ? check_usage_backwards+0x340/0x340 [ 53.468405] __lock_acquire+0xc62/0x49c0 [ 53.472509] ? mark_held_locks+0x100/0x100 [ 53.476745] ? save_stack+0x45/0xd0 [ 53.480410] ? __kasan_slab_free+0x102/0x150 [ 53.484813] ? kasan_slab_free+0xe/0x10 [ 53.488910] ? kfree+0xcf/0x220 [ 53.492186] ? mark_held_locks+0x100/0x100 [ 53.496446] ? find_held_lock+0x35/0x130 [ 53.500575] ? debug_object_deactivate+0x1e4/0x360 [ 53.505503] ? mark_held_locks+0x100/0x100 [ 53.509740] ? debug_object_deactivate+0x1e4/0x360 [ 53.514670] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.519767] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 53.524395] lock_acquire+0x16f/0x3f0 [ 53.528180] ? rxrpc_put_client_conn+0x683/0xc20 [ 53.532936] _raw_spin_lock+0x2f/0x40 [ 53.536723] ? rxrpc_put_client_conn+0x683/0xc20 [ 53.541524] rxrpc_put_client_conn+0x683/0xc20 [ 53.546093] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 53.550832] ? rxrpc_process_call.cold+0x20/0x20 [ 53.555633] rxrpc_rcu_destroy_call+0xbd/0x200 [ 53.560208] rcu_process_callbacks+0xba0/0x1a30 [ 53.564866] ? __rcu_read_unlock+0x170/0x170 [ 53.569281] __do_softirq+0x25c/0x921 [ 53.573079] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.578615] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.584188] irq_exit+0x180/0x1d0 [ 53.587631] smp_apic_timer_interrupt+0x13b/0x550 [ 53.592514] apic_timer_interrupt+0xf/0x20 [ 53.596737] [ 53.598964] RIP: 0010:native_safe_halt+0xe/0x10 [ 53.603619] Code: ff ff 48 89 df e8 22 c7 4d fa eb 82 e9 07 00 00 00 0f 00 2d 44 30 53 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 34 30 53 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 6e 9b 04 fa e8 09 [ 53.622549] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 53.630255] RAX: 1ffffffff11e4ab4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 53.637513] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 53.644773] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 53.652063] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 53.659351] R13: ffffffff88f25590 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 53.666663] ? default_idle+0x4e/0x320 [ 53.670538] arch_cpu_idle+0xa/0x10 [ 53.674146] default_idle_call+0x36/0x90 [ 53.678188] do_idle+0x30c/0x4d0 [ 53.681537] ? arch_cpu_idle_exit+0x80/0x80 [ 53.685852] ? check_preemption_disabled+0x48/0x290 [ 53.690872] cpu_startup_entry+0xc8/0xe0 [ 53.694927] ? cpu_in_idle+0x20/0x20 [ 53.698639] rest_init+0x219/0x222 [ 53.702183] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 53.708669] start_kernel+0x7ec/0x825 [ 53.712454] ? mem_encrypt_init+0xb/0xb [ 53.716528] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.722058] ? x86_family+0x41/0x50 [ 53.725681] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 53.731225] x86_64_start_reservations+0x29/0x2b [ 53.