[ 44.242499] audit: type=1800 audit(1582269879.776:30): pid=7772 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 syzkaller login: [ 48.670265] kauditd_printk_skb: 4 callbacks suppressed [ 48.670280] audit: type=1400 audit(1582269884.236:35): avc: denied { map } for pid=7943 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 '10.128.0.213' (ECDSA) to the list of known hosts. executing program [ 57.609427] audit: type=1400 audit(1582269893.176:36): avc: denied { map } for pid=7955 comm="syz-executor287" path="/root/syz-executor287870659" 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 [ 57.631558] IPVS: ftp: loaded support on port[0] = 21 [ 57.712422] [ 57.714307] ================================ [ 57.718701] WARNING: inconsistent lock state [ 57.723098] 4.19.105-syzkaller #0 Not tainted [ 57.727602] -------------------------------- [ 57.731997] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 57.738188] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 57.743500] 000000008b257f18 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 57.753729] {SOFTIRQ-ON-W} state was registered at: [ 57.758757] lock_acquire+0x16f/0x3f0 [ 57.762631] _raw_spin_lock+0x2f/0x40 [ 57.766513] rxrpc_connect_call+0x351/0x4920 [ 57.771002] rxrpc_new_client_call+0x8e7/0x1880 [ 57.775845] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 57.780541] rxrpc_sendmsg+0x4a0/0x5b0 [ 57.784503] sock_sendmsg+0xd7/0x130 [ 57.788302] ___sys_sendmsg+0x3e2/0x920 [ 57.792369] __sys_sendmmsg+0x1bf/0x4e0 [ 57.796686] __x64_sys_sendmmsg+0x9d/0x100 [ 57.801001] do_syscall_64+0xfd/0x620 [ 57.804936] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.810982] irq event stamp: 182950 [ 57.814604] hardirqs last enabled at (182950): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 57.824393] hardirqs last disabled at (182949): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 57.833749] softirqs last enabled at (182934): [] _local_bh_enable+0x1c/0x30 [ 57.842581] softirqs last disabled at (182935): [] irq_exit+0x180/0x1d0 [ 57.850873] [ 57.850873] other info that might help us debug this: [ 57.857521] Possible unsafe locking scenario: [ 57.857521] [ 57.863826] CPU0 [ 57.866483] ---- [ 57.869107] lock(&(&local->client_conns_lock)->rlock); [ 57.874554] [ 57.877301] lock(&(&local->client_conns_lock)->rlock); [ 57.882917] [ 57.882917] *** DEADLOCK *** [ 57.882917] [ 57.888971] 1 lock held by swapper/0/0: [ 57.894452] #0: 000000009c914349 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 57.903732] [ 57.903732] stack backtrace: [ 57.908235] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.105-syzkaller #0 [ 57.915468] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.924811] Call Trace: [ 57.928885] [ 57.931079] dump_stack+0x197/0x210 [ 57.934699] print_usage_bug.cold+0x330/0x42a [ 57.939201] ? save_stack_trace+0x1a/0x20 [ 57.943361] mark_lock+0xd1b/0x1370 [ 57.946988] ? check_usage_backwards+0x340/0x340 [ 57.951739] __lock_acquire+0xc62/0x49c0 [ 57.955802] ? mark_held_locks+0x100/0x100 [ 57.960026] ? __lock_acquire+0x6ee/0x49c0 [ 57.964251] ? mark_held_locks+0x100/0x100 [ 57.968469] ? find_held_lock+0x35/0x130 [ 57.972526] ? debug_object_deactivate+0x1e4/0x360 [ 57.977454] ? mark_held_locks+0x100/0x100 [ 57.981710] ? debug_object_deactivate+0x1e4/0x360 [ 57.986632] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 57.991731] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 58.000835] lock_acquire+0x16f/0x3f0 [ 58.004805] ? rxrpc_put_client_conn+0x683/0xc20 [ 58.009584] _raw_spin_lock+0x2f/0x40 [ 58.013382] ? rxrpc_put_client_conn+0x683/0xc20 [ 58.018136] rxrpc_put_client_conn+0x683/0xc20 [ 58.022712] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 58.027457] ? rxrpc_process_call.cold+0x20/0x20 [ 58.032203] rxrpc_rcu_destroy_call+0xbd/0x200 [ 58.036965] rcu_process_callbacks+0xba0/0x1a30 [ 58.041622] ? __rcu_read_unlock+0x170/0x170 [ 58.046028] __do_softirq+0x25c/0x921 [ 58.049827] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.055394] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.060931] irq_exit+0x180/0x1d0 [ 58.064374] smp_apic_timer_interrupt+0x13b/0x550 [ 58.069260] apic_timer_interrupt+0xf/0x20 [ 58.073529] [ 58.075763] RIP: 0010:native_safe_halt+0xe/0x10 [ 58.080429] 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 [ 58.099961] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 58.107689] RAX: 1ffffffff11e4ad4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 58.114949] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 58.122557] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 58.129820] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 58.137084] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 58.144969] ? default_idle+0x4e/0x320 [ 58.148859] arch_cpu_idle+0xa/0x10 [ 58.153017] default_idle_call+0x36/0x90 [ 58.157074] do_idle+0x30c/0x4d0 [ 58.160450] ? arch_cpu_idle_exit+0x80/0x80 [ 58.164760] ? check_preemption_disabled+0x48/0x290 [ 58.169763] cpu_startup_entry+0xc8/0xe0 [ 58.173809] ? cpu_in_idle+0x20/0x20 [ 58.177573] rest_init+0x219/0x222 [ 58.181109] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 58.187597] start_kernel+0x7ec/0x825 [ 58.191571] ? mem_encrypt_init+0xb/0xb [ 58.195532] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 58.201100] ? x86_family+0x41/0x50 [ 58.204724] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 58.210270] x86_64_start_reservations+0x29/0x2b