[ 45.054584] audit: type=1800 audit(1582180983.083:29): pid=8076 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 [ 45.075269] audit: type=1800 audit(1582180983.093:30): pid=8076 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 '10.128.0.213' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.436139] kauditd_printk_skb: 5 callbacks suppressed [ 54.436155] audit: type=1400 audit(1582180992.473:36): avc: denied { map } for pid=8261 comm="syz-executor573" path="/root/syz-executor573740695" 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 [ 54.455225] IPVS: ftp: loaded support on port[0] = 21 [ 54.535475] [ 54.537133] ================================ [ 54.541558] WARNING: inconsistent lock state [ 54.545947] 4.19.105-syzkaller #0 Not tainted [ 54.550482] -------------------------------- [ 54.554865] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 54.561013] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 54.566286] 00000000d584493c (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 54.576529] {SOFTIRQ-ON-W} state was registered at: [ 54.581542] lock_acquire+0x16f/0x3f0 [ 54.585416] _raw_spin_lock+0x2f/0x40 [ 54.589899] rxrpc_connect_call+0x351/0x4920 [ 54.594394] rxrpc_new_client_call+0x8e7/0x1880 [ 54.599180] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 54.603512] rxrpc_sendmsg+0x4a0/0x5b0 [ 54.607483] sock_sendmsg+0xd7/0x130 [ 54.611290] ___sys_sendmsg+0x3e2/0x920 [ 54.615342] __sys_sendmmsg+0x1bf/0x4e0 [ 54.619419] __x64_sys_sendmmsg+0x9d/0x100 [ 54.623749] do_syscall_64+0xfd/0x620 [ 54.627643] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.632965] irq event stamp: 154884 [ 54.636608] hardirqs last enabled at (154884): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.646410] hardirqs last disabled at (154883): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 54.655878] softirqs last enabled at (154776): [] _local_bh_enable+0x1c/0x30 [ 54.664907] softirqs last disabled at (154777): [] irq_exit+0x180/0x1d0 [ 54.673257] [ 54.673257] other info that might help us debug this: [ 54.679928] Possible unsafe locking scenario: [ 54.679928] [ 54.685970] CPU0 [ 54.688591] ---- [ 54.691202] lock(&(&local->client_conns_lock)->rlock); [ 54.696644] [ 54.699393] lock(&(&local->client_conns_lock)->rlock); [ 54.705017] [ 54.705017] *** DEADLOCK *** [ 54.705017] [ 54.711080] 1 lock held by swapper/1/0: [ 54.715045] #0: 00000000db28d881 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 54.723970] [ 54.723970] stack backtrace: [ 54.728473] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.105-syzkaller #0 [ 54.735657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.745016] Call Trace: [ 54.747615] [ 54.749765] dump_stack+0x197/0x210 [ 54.753409] print_usage_bug.cold+0x330/0x42a [ 54.757916] ? save_stack_trace+0x1a/0x20 [ 54.762082] mark_lock+0xd1b/0x1370 [ 54.765771] ? check_usage_backwards+0x340/0x340 [ 54.770535] __lock_acquire+0xc62/0x49c0 [ 54.774643] ? mark_held_locks+0x100/0x100 [ 54.778996] ? __kasan_slab_free+0x102/0x150 [ 54.783422] ? kasan_slab_free+0xe/0x10 [ 54.787410] ? kmem_cache_free+0x86/0x260 [ 54.791573] ? put_cred_rcu+0x2b6/0x4b0 [ 54.795558] ? mark_held_locks+0x100/0x100 [ 54.799807] ? find_held_lock+0x35/0x130 [ 54.803873] ? debug_object_deactivate+0x1e4/0x360 [ 54.808824] ? mark_held_locks+0x100/0x100 [ 54.813055] ? debug_object_deactivate+0x1e4/0x360 [ 54.818094] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.823206] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 54.827818] lock_acquire+0x16f/0x3f0 [ 54.831632] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.836497] _raw_spin_lock+0x2f/0x40 [ 54.840416] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.845244] rxrpc_put_client_conn+0x683/0xc20 [ 54.849844] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.854616] ? rxrpc_process_call.cold+0x20/0x20 [ 54.859470] rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.864066] rcu_process_callbacks+0xba0/0x1a30 [ 54.868743] ? __rcu_read_unlock+0x170/0x170 [ 54.873244] __do_softirq+0x25c/0x921 [ 54.877073] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.882622] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.888180] irq_exit+0x180/0x1d0 [ 54.891628] smp_apic_timer_interrupt+0x13b/0x550 [ 54.896483] apic_timer_interrupt+0xf/0x20 [ 54.900722] [ 54.903017] RIP: 0010:native_safe_halt+0xe/0x10 [ 54.907783] 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 [ 54.926688] RSP: 0018:ffff8880aa3b7d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 54.934498] RAX: 1ffffffff11e4ad4 RBX: ffff8880aa3a43c0 RCX: 0000000000000000 [ 54.941760] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa3a4c3c [ 54.949030] RBP: ffff8880aa3b7d38 R08: ffff8880aa3a43c0 R09: 0000000000000000 [ 54.956303] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 54.963621] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffff8880aa3a43c0 [ 54.970924] ? default_idle+0x4e/0x320 [ 54.974809] arch_cpu_idle+0xa/0x10 [ 54.978534] default_idle_call+0x36/0x90 [ 54.982654] do_idle+0x30c/0x4d0 [ 54.986030] ? trace_hardirqs_on+0x67/0x220 [ 54.990379] ? arch_cpu_idle_exit+0x80/0x80 [ 54.994717] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 54.999816] ? complete+0x61/0x80 [ 55.003278] cpu_startup_entry+0xc8/0xe0 [ 55.007331] ? cpu_in_idle+0x20/0x20 [ 55.011056] ? setup_APIC_timer+0x1aa/0x200 [ 55.015391] start_secondary+0x3e8/0x5b0 [ 55.019552] ? set_cpu_sibling_map+0x1860/0x1860 [ 55.024318] secondary_startup_64+0xa4/0xb0