[ 47.550473] audit: type=1800 audit(1582132650.304:30): pid=8298 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 syzkaller login: [ 51.811633] kauditd_printk_skb: 4 callbacks suppressed [ 51.811648] audit: type=1400 audit(1582132654.604:35): avc: denied { map } for pid=8472 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 '10.128.0.82' (ECDSA) to the list of known hosts. executing program [ 58.628380] audit: type=1400 audit(1582132661.414:36): avc: denied { map } for pid=8484 comm="syz-executor495" path="/root/syz-executor495721589" 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 [ 58.652981] IPVS: ftp: loaded support on port[0] = 21 [ 58.721179] [ 58.722835] ================================ [ 58.727344] WARNING: inconsistent lock state [ 58.731770] 4.19.104-syzkaller #0 Not tainted [ 58.736256] -------------------------------- [ 58.741715] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 58.748060] swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 58.753339] 000000005343ec33 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 58.763692] {SOFTIRQ-ON-W} state was registered at: [ 58.768810] lock_acquire+0x16f/0x3f0 [ 58.772706] _raw_spin_lock+0x2f/0x40 [ 58.776949] rxrpc_connect_call+0x351/0x4920 [ 58.781464] rxrpc_new_client_call+0x8e7/0x1880 [ 58.786268] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 58.790589] rxrpc_sendmsg+0x4a0/0x5b0 [ 58.794584] sock_sendmsg+0xd7/0x130 [ 58.798497] ___sys_sendmsg+0x3e2/0x920 [ 58.802577] __sys_sendmmsg+0x1bf/0x4e0 [ 58.806746] __x64_sys_sendmmsg+0x9d/0x100 [ 58.811251] do_syscall_64+0xfd/0x620 [ 58.815229] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 58.820510] irq event stamp: 133788 [ 58.824312] hardirqs last enabled at (133788): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 58.834200] hardirqs last disabled at (133787): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 58.843562] softirqs last enabled at (133692): [] _local_bh_enable+0x1c/0x30 [ 58.852405] softirqs last disabled at (133693): [] irq_exit+0x180/0x1d0 [ 58.861298] [ 58.861298] other info that might help us debug this: [ 58.867950] Possible unsafe locking scenario: [ 58.867950] [ 58.874258] CPU0 [ 58.876829] ---- [ 58.879414] lock(&(&local->client_conns_lock)->rlock); [ 58.884972] [ 58.888055] lock(&(&local->client_conns_lock)->rlock); [ 58.893826] [ 58.893826] *** DEADLOCK *** [ 58.893826] [ 58.900345] 1 lock held by swapper/1/0: [ 58.904325] #0: 0000000073eb538b (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 58.913095] [ 58.913095] stack backtrace: [ 58.918552] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.104-syzkaller #0 [ 58.925647] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.935122] Call Trace: [ 58.937697] [ 58.939850] dump_stack+0x197/0x210 [ 58.943497] print_usage_bug.cold+0x330/0x42a [ 58.948207] ? save_stack_trace+0x1a/0x20 [ 58.952378] mark_lock+0xd1b/0x1370 [ 58.956137] ? check_usage_backwards+0x340/0x340 [ 58.961023] __lock_acquire+0xc62/0x49c0 [ 58.965218] ? mark_held_locks+0x100/0x100 [ 58.969838] ? save_stack+0x45/0xd0 [ 58.973559] ? __kasan_slab_free+0x102/0x150 [ 58.978066] ? kasan_slab_free+0xe/0x10 [ 58.982040] ? kfree+0xcf/0x220 [ 58.985356] ? mark_held_locks+0x100/0x100 [ 58.989814] ? find_held_lock+0x35/0x130 [ 58.993925] ? debug_object_deactivate+0x1e4/0x360 [ 58.999716] ? mark_held_locks+0x100/0x100 [ 59.003996] ? debug_object_deactivate+0x1e4/0x360 [ 59.008966] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 59.014089] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 59.018686] lock_acquire+0x16f/0x3f0 [ 59.022577] ? rxrpc_put_client_conn+0x683/0xc20 [ 59.027499] _raw_spin_lock+0x2f/0x40 [ 59.031578] ? rxrpc_put_client_conn+0x683/0xc20 [ 59.036340] rxrpc_put_client_conn+0x683/0xc20 [ 59.040927] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 59.045703] ? rxrpc_process_call.cold+0x20/0x20 [ 59.050458] rxrpc_rcu_destroy_call+0xbd/0x200 [ 59.055384] rcu_process_callbacks+0xba0/0x1a30 [ 59.060181] ? __rcu_read_unlock+0x170/0x170 [ 59.064599] __do_softirq+0x25c/0x921 [ 59.068402] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.073940] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 59.079485] irq_exit+0x180/0x1d0 [ 59.083104] smp_apic_timer_interrupt+0x13b/0x550 [ 59.088101] apic_timer_interrupt+0xf/0x20 [ 59.092321] [ 59.094564] RIP: 0010:native_safe_halt+0xe/0x10 [ 59.099231] 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 [ 59.118369] RSP: 0018:ffff8880aa3b7d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 59.126337] RAX: 1ffffffff11e4ad4 RBX: ffff8880aa3a43c0 RCX: 0000000000000000 [ 59.133955] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa3a4c3c [ 59.141231] RBP: ffff8880aa3b7d38 R08: ffff8880aa3a43c0 R09: 0000000000000000 [ 59.148906] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 59.157457] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffff8880aa3a43c0 [ 59.165153] ? default_idle+0x4e/0x320 [ 59.169115] arch_cpu_idle+0xa/0x10 [ 59.172744] default_idle_call+0x36/0x90 [ 59.176836] do_idle+0x30c/0x4d0 [ 59.180203] ? trace_hardirqs_on+0x67/0x220 [ 59.184636] ? arch_cpu_idle_exit+0x80/0x80 [ 59.189546] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 59.194841] ? complete+0x61/0x80 [ 59.198321] cpu_startup_entry+0xc8/0xe0 [ 59.202659] ? cpu_in_idle+0x20/0x20 [ 59.206394] ? setup_APIC_timer+0x1aa/0x200 [ 59.210842] start_secondary+0x3e8/0x5b0 [ 59.215075] ? set_cpu_sibling_map+0x1860/0x1860 [ 59.220077] secondary_startup_64+0xa4/0xb0