[ 45.054699] audit: type=1800 audit(1582551000.065:29): pid=7856 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 [ 45.105411] audit: type=1800 audit(1582551000.075:30): pid=7856 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 '10.128.0.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.283705] kauditd_printk_skb: 5 callbacks suppressed [ 54.283720] audit: type=1400 audit(1582551009.295:36): avc: denied { map } for pid=8041 comm="syz-executor147" path="/root/syz-executor147302378" 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 [ 54.296593] IPVS: ftp: loaded support on port[0] = 21 [ 54.376959] [ 54.378642] ================================ [ 54.383032] WARNING: inconsistent lock state [ 54.387431] 4.19.106-syzkaller #0 Not tainted [ 54.391913] -------------------------------- [ 54.396340] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 54.402483] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 54.407792] 00000000ec21ecfe (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 54.418028] {SOFTIRQ-ON-W} state was registered at: [ 54.423058] lock_acquire+0x16f/0x3f0 [ 54.426942] _raw_spin_lock+0x2f/0x40 [ 54.430866] rxrpc_connect_call+0x351/0x4920 [ 54.435350] rxrpc_new_client_call+0x8e7/0x1880 [ 54.440101] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 54.444497] rxrpc_sendmsg+0x4a0/0x5b0 [ 54.448508] sock_sendmsg+0xd7/0x130 [ 54.452303] ___sys_sendmsg+0x3e2/0x920 [ 54.456382] __sys_sendmmsg+0x1bf/0x4e0 [ 54.460471] __x64_sys_sendmmsg+0x9d/0x100 [ 54.464787] do_syscall_64+0xfd/0x620 [ 54.468923] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.474197] irq event stamp: 155722 [ 54.477844] hardirqs last enabled at (155722): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.487648] hardirqs last disabled at (155721): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 54.497048] softirqs last enabled at (155592): [] _local_bh_enable+0x1c/0x30 [ 54.505887] softirqs last disabled at (155593): [] irq_exit+0x180/0x1d0 [ 54.514191] [ 54.514191] other info that might help us debug this: [ 54.520851] Possible unsafe locking scenario: [ 54.520851] [ 54.526931] CPU0 [ 54.529537] ---- [ 54.532098] lock(&(&local->client_conns_lock)->rlock); [ 54.537573] [ 54.540347] lock(&(&local->client_conns_lock)->rlock); [ 54.545959] [ 54.545959] *** DEADLOCK *** [ 54.545959] [ 54.552014] 1 lock held by swapper/1/0: [ 54.556000] #0: 0000000084a53704 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 54.564755] [ 54.564755] stack backtrace: [ 54.569243] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.106-syzkaller #0 [ 54.576339] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.585729] Call Trace: [ 54.588304] [ 54.590496] dump_stack+0x197/0x210 [ 54.594121] print_usage_bug.cold+0x330/0x42a [ 54.598608] ? save_stack_trace+0x1a/0x20 [ 54.602788] mark_lock+0xd1b/0x1370 [ 54.606443] ? check_usage_backwards+0x340/0x340 [ 54.611203] __lock_acquire+0xc62/0x49c0 [ 54.615256] ? mark_held_locks+0x100/0x100 [ 54.619486] ? save_stack+0x45/0xd0 [ 54.623115] ? __kasan_slab_free+0x102/0x150 [ 54.627519] ? kasan_slab_free+0xe/0x10 [ 54.631477] ? kfree+0xcf/0x220 [ 54.634754] ? mark_held_locks+0x100/0x100 [ 54.638982] ? find_held_lock+0x35/0x130 [ 54.643086] ? debug_object_deactivate+0x1e4/0x360 [ 54.648006] ? mark_held_locks+0x100/0x100 [ 54.652223] ? debug_object_deactivate+0x1e4/0x360 [ 54.657139] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.662232] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 54.666815] lock_acquire+0x16f/0x3f0 [ 54.670611] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.675357] _raw_spin_lock+0x2f/0x40 [ 54.679145] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.683883] rxrpc_put_client_conn+0x683/0xc20 [ 54.688491] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.693240] ? rxrpc_process_call.cold+0x20/0x20 [ 54.697982] rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.702559] rcu_process_callbacks+0xba0/0x1a30 [ 54.707262] ? __rcu_read_unlock+0x170/0x170 [ 54.711669] __do_softirq+0x25c/0x921 [ 54.715450] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.721007] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.726535] irq_exit+0x180/0x1d0 [ 54.730015] smp_apic_timer_interrupt+0x13b/0x550 [ 54.734852] apic_timer_interrupt+0xf/0x20 [ 54.739101] [ 54.741337] RIP: 0010:native_safe_halt+0xe/0x10 [ 54.746047] 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 [ 54.765122] RSP: 0018:ffff8880aa3b7d08 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 54.772830] RAX: 1ffffffff11e4ab4 RBX: ffff8880aa3a43c0 RCX: 0000000000000000 [ 54.780097] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa3a4c3c [ 54.787363] RBP: ffff8880aa3b7d38 R08: ffff8880aa3a43c0 R09: 0000000000000000 [ 54.794733] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 54.802009] R13: ffffffff88f25590 R14: 0000000000000000 R15: ffff8880aa3a43c0 [ 54.809304] ? default_idle+0x4e/0x320 [ 54.813194] arch_cpu_idle+0xa/0x10 [ 54.816833] default_idle_call+0x36/0x90 [ 54.820940] do_idle+0x30c/0x4d0 [ 54.824297] ? trace_hardirqs_on+0x67/0x220 [ 54.828616] ? arch_cpu_idle_exit+0x80/0x80 [ 54.832937] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 54.838040] ? complete+0x61/0x80 [ 54.841487] cpu_startup_entry+0xc8/0xe0 [ 54.845584] ? cpu_in_idle+0x20/0x20 [ 54.849290] ? setup_APIC_timer+0x1aa/0x200 [ 54.853605] start_secondary+0x3e8/0x5b0 [ 54.857704] ? set_cpu_sibling_map+0x1860/0x1860 [ 54.862460] secondary_startup_64+0xa4/0xb0