[ 42.427143] audit: type=1800 audit(1582091641.190:31): pid=7823 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 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: [ 47.440355] kauditd_printk_skb: 3 callbacks suppressed [ 47.440371] audit: type=1400 audit(1582091646.260:35): avc: denied { map } for pid=7996 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 '10.128.0.181' (ECDSA) to the list of known hosts. executing program [ 59.622916] audit: type=1400 audit(1582091658.450:36): avc: denied { map } for pid=8008 comm="syz-executor103" path="/root/syz-executor103580921" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 59.639910] IPVS: ftp: loaded support on port[0] = 21 [ 59.730950] [ 59.732753] ================================ [ 59.738512] WARNING: inconsistent lock state [ 59.745321] 4.19.104-syzkaller #0 Not tainted [ 59.750347] -------------------------------- [ 59.755094] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 59.761437] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 59.767273] 00000000c74fdc8e (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 59.779213] {SOFTIRQ-ON-W} state was registered at: [ 59.785217] lock_acquire+0x16f/0x3f0 [ 59.789875] _raw_spin_lock+0x2f/0x40 [ 59.794329] rxrpc_connect_call+0x351/0x4920 [ 59.800305] rxrpc_new_client_call+0x8e7/0x1880 [ 59.805686] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 59.811073] rxrpc_sendmsg+0x4a0/0x5b0 [ 59.815588] sock_sendmsg+0xd7/0x130 [ 59.819754] ___sys_sendmsg+0x3e2/0x920 [ 59.824571] __sys_sendmmsg+0x1bf/0x4e0 [ 59.829077] __x64_sys_sendmmsg+0x9d/0x100 [ 59.833402] do_syscall_64+0xfd/0x620 [ 59.837616] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.843730] irq event stamp: 176364 [ 59.847606] hardirqs last enabled at (176364): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 59.858171] hardirqs last disabled at (176363): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 59.868366] softirqs last enabled at (176260): [] _local_bh_enable+0x1c/0x30 [ 59.877574] softirqs last disabled at (176261): [] irq_exit+0x180/0x1d0 [ 59.887080] [ 59.887080] other info that might help us debug this: [ 59.893836] Possible unsafe locking scenario: [ 59.893836] [ 59.901070] CPU0 [ 59.904587] ---- [ 59.908221] lock(&(&local->client_conns_lock)->rlock); [ 59.914156] [ 59.916907] lock(&(&local->client_conns_lock)->rlock); [ 59.923192] [ 59.923192] *** DEADLOCK *** [ 59.923192] [ 59.929390] 1 lock held by swapper/0/0: [ 59.933793] #0: 00000000afa5f850 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 59.943417] [ 59.943417] stack backtrace: [ 59.947929] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.104-syzkaller #0 [ 59.955592] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.965635] Call Trace: [ 59.968288] [ 59.970728] dump_stack+0x197/0x210 [ 59.974772] print_usage_bug.cold+0x330/0x42a [ 59.979686] ? save_stack_trace+0x1a/0x20 [ 59.984012] mark_lock+0xd1b/0x1370 [ 59.988156] ? check_usage_backwards+0x340/0x340 [ 59.992919] __lock_acquire+0xc62/0x49c0 [ 59.997166] ? mark_held_locks+0x100/0x100 [ 60.001598] ? save_stack+0x45/0xd0 [ 60.005385] ? __kasan_slab_free+0x102/0x150 [ 60.009820] ? kasan_slab_free+0xe/0x10 [ 60.015461] ? kfree+0xcf/0x220 [ 60.018747] ? mark_held_locks+0x100/0x100 [ 60.023547] ? find_held_lock+0x35/0x130 [ 60.027918] ? debug_object_deactivate+0x1e4/0x360 [ 60.033247] ? mark_held_locks+0x100/0x100 [ 60.037649] ? debug_object_deactivate+0x1e4/0x360 [ 60.042581] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 60.047883] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 60.052776] lock_acquire+0x16f/0x3f0 [ 60.056677] ? rxrpc_put_client_conn+0x683/0xc20 [ 60.061905] _raw_spin_lock+0x2f/0x40 [ 60.066071] ? rxrpc_put_client_conn+0x683/0xc20 [ 60.071148] rxrpc_put_client_conn+0x683/0xc20 [ 60.075963] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 60.081315] ? rxrpc_process_call.cold+0x20/0x20 [ 60.086615] rxrpc_rcu_destroy_call+0xbd/0x200 [ 60.091922] rcu_process_callbacks+0xba0/0x1a30 [ 60.097343] ? __rcu_read_unlock+0x170/0x170 [ 60.102377] __do_softirq+0x25c/0x921 [ 60.106820] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.112359] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.118349] irq_exit+0x180/0x1d0 [ 60.121953] smp_apic_timer_interrupt+0x13b/0x550 [ 60.126811] apic_timer_interrupt+0xf/0x20 [ 60.131506] [ 60.133747] RIP: 0010:native_safe_halt+0xe/0x10 [ 60.138957] 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 [ 60.159371] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 60.168318] RAX: 1ffffffff11e4ad4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 60.177562] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 60.185866] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 60.194540] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 60.202582] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 60.210589] ? default_idle+0x4e/0x320 [ 60.215813] arch_cpu_idle+0xa/0x10 [ 60.219845] default_idle_call+0x36/0x90 [ 60.225669] do_idle+0x30c/0x4d0 [ 60.229925] ? arch_cpu_idle_exit+0x80/0x80 [ 60.236432] ? check_preemption_disabled+0x48/0x290 [ 60.243759] cpu_startup_entry+0xc8/0xe0 [ 60.250285] ? cpu_in_idle+0x20/0x20 [ 60.255000] rest_init+0x219/0x222 [ 60.259330] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 60.267703] start_kernel+0x7ec/0x825 [ 60.272219] ? mem_encrypt_init+0xb/0xb [ 60.278649] ? __sanitizer_co