[ 41.360864] audit: type=1800 audit(1582384436.809:31): pid=7925 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 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: [ 46.776633] kauditd_printk_skb: 3 callbacks suppressed [ 46.776648] audit: type=1400 audit(1582384442.289:35): avc: denied { map } for pid=8100 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 '10.128.0.145' (ECDSA) to the list of known hosts. executing program [ 53.521319] audit: type=1400 audit(1582384449.029:36): avc: denied { map } for pid=8112 comm="syz-executor336" path="/root/syz-executor336831414" 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 [ 53.535478] IPVS: ftp: loaded support on port[0] = 21 [ 53.616234] [ 53.618069] ================================ [ 53.622742] WARNING: inconsistent lock state [ 53.627150] 4.19.105-syzkaller #0 Not tainted [ 53.631729] -------------------------------- [ 53.636298] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 53.642622] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 53.648105] 00000000b398ff6f (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 53.658493] {SOFTIRQ-ON-W} state was registered at: [ 53.663511] lock_acquire+0x16f/0x3f0 [ 53.667398] _raw_spin_lock+0x2f/0x40 [ 53.671281] rxrpc_connect_call+0x351/0x4920 [ 53.675773] rxrpc_new_client_call+0x8e7/0x1880 [ 53.680536] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 53.684959] rxrpc_sendmsg+0x4a0/0x5b0 [ 53.689094] sock_sendmsg+0xd7/0x130 [ 53.692892] ___sys_sendmsg+0x3e2/0x920 [ 53.697338] __sys_sendmmsg+0x1bf/0x4e0 [ 53.701636] __x64_sys_sendmmsg+0x9d/0x100 [ 53.706164] do_syscall_64+0xfd/0x620 [ 53.710065] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.715370] irq event stamp: 153696 [ 53.719018] hardirqs last enabled at (153696): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.728811] hardirqs last disabled at (153695): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 53.738349] softirqs last enabled at (153592): [] _local_bh_enable+0x1c/0x30 [ 53.747187] softirqs last disabled at (153593): [] irq_exit+0x180/0x1d0 [ 53.755493] [ 53.755493] other info that might help us debug this: [ 53.762217] Possible unsafe locking scenario: [ 53.762217] [ 53.768407] CPU0 [ 53.771162] ---- [ 53.774035] lock(&(&local->client_conns_lock)->rlock); [ 53.780724] [ 53.783472] lock(&(&local->client_conns_lock)->rlock); [ 53.789675] [ 53.789675] *** DEADLOCK *** [ 53.789675] [ 53.795907] 1 lock held by swapper/1/0: [ 53.799876] #0: 000000003e14e76e (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 53.809149] [ 53.809149] stack backtrace: [ 53.813649] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.105-syzkaller #0 [ 53.820987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.830657] Call Trace: [ 53.833513] [ 53.835674] dump_stack+0x197/0x210 [ 53.839306] print_usage_bug.cold+0x330/0x42a [ 53.843815] ? save_stack_trace+0x1a/0x20 [ 53.847971] mark_lock+0xd1b/0x1370 [ 53.851595] ? check_usage_backwards+0x340/0x340 [ 53.856753] __lock_acquire+0xc62/0x49c0 [ 53.860831] ? mark_held_locks+0x100/0x100 [ 53.865196] ? save_stack+0x45/0xd0 [ 53.868826] ? __kasan_slab_free+0x102/0x150 [ 53.873426] ? kasan_slab_free+0xe/0x10 [ 53.877401] ? kfree+0xcf/0x220 [ 53.880838] ? mark_held_locks+0x100/0x100 [ 53.885094] ? find_held_lock+0x35/0x130 [ 53.889561] ? debug_object_deactivate+0x1e4/0x360 [ 53.894504] ? mark_held_locks+0x100/0x100 [ 53.898877] ? debug_object_deactivate+0x1e4/0x360 [ 53.903842] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.909032] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 53.914722] lock_acquire+0x16f/0x3f0 [ 53.918524] ? rxrpc_put_client_conn+0x683/0xc20 [ 53.923340] _raw_spin_lock+0x2f/0x40 [ 53.927574] ? rxrpc_put_client_conn+0x683/0xc20 [ 53.932328] rxrpc_put_client_conn+0x683/0xc20 [ 53.937036] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 53.941791] ? rxrpc_process_call.cold+0x20/0x20 [ 53.946544] rxrpc_rcu_destroy_call+0xbd/0x200 [ 53.951126] rcu_process_callbacks+0xba0/0x1a30 [ 53.955928] ? __rcu_read_unlock+0x170/0x170 [ 53.960865] __do_softirq+0x25c/0x921 [ 53.964881] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.970425] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.976302] irq_exit+0x180/0x1d0 [ 53.979826] smp_apic_timer_interrupt+0x13b/0x550 [ 53.984667] apic_timer_interrupt+0xf/0x20 [ 53.988895] [ 53.991132] RIP: 0010:native_safe_halt+0xe/0x10 [ 53.995828] 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 [ 54.015184] RSP: 0018:ffff8880aa3b7d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 54.023017] RAX: 1ffffffff11e4ad4 RBX: ffff8880aa3a43c0 RCX: 0000000000000000 [ 54.030444] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa3a4c3c [ 54.037883] RBP: ffff8880aa3b7d38 R08: ffff8880aa3a43c0 R09: 0000000000000000 [ 54.045187] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 54.052545] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffff8880aa3a43c0 [ 54.059923] ? default_idle+0x4e/0x320 [ 54.063851] arch_cpu_idle+0xa/0x10 [ 54.067474] default_idle_call+0x36/0x90 [ 54.071632] do_idle+0x30c/0x4d0 [ 54.075122] ? trace_hardirqs_on+0x67/0x220 [ 54.079572] ? arch_cpu_idle_exit+0x80/0x80 [ 54.083898] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 54.089149] ? complete+0x61/0x80 [ 54.092618] cpu_startup_entry+0xc8/0xe0 [ 54.097381] ? cpu_in_idle+0x20/0x20 [ 54.101390] ? setup_APIC_timer+0x1aa/0x200 [ 54.105712] start_secondary+0x3e8/0x5b0 [ 54.110389] ? set_cpu_sibling_map+0x1860/0x1860 [ 54.115271] secondary_startup_64+0xa4/0xb0