[ 41.993105] audit: type=1800 audit(1582547013.014:30): pid=7981 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: [ 47.279492] kauditd_printk_skb: 4 callbacks suppressed [ 47.279505] audit: type=1400 audit(1582547018.324:35): avc: denied { map } for pid=8155 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 '10.128.0.135' (ECDSA) to the list of known hosts. executing program [ 53.996169] audit: type=1400 audit(1582547025.034:36): avc: denied { map } for pid=8167 comm="syz-executor489" path="/root/syz-executor489851822" 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 [ 54.017247] IPVS: ftp: loaded support on port[0] = 21 [ 54.098245] [ 54.100070] ================================ [ 54.104530] WARNING: inconsistent lock state [ 54.109028] 4.19.106-syzkaller #0 Not tainted [ 54.113567] -------------------------------- [ 54.118095] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 54.124351] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 54.129652] 00000000c39e2630 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 54.139953] {SOFTIRQ-ON-W} state was registered at: [ 54.144977] lock_acquire+0x16f/0x3f0 [ 54.148907] _raw_spin_lock+0x2f/0x40 [ 54.152815] rxrpc_connect_call+0x351/0x4920 [ 54.157315] rxrpc_new_client_call+0x8e7/0x1880 [ 54.162134] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 54.166457] rxrpc_sendmsg+0x4a0/0x5b0 [ 54.170435] sock_sendmsg+0xd7/0x130 [ 54.174277] ___sys_sendmsg+0x3e2/0x920 [ 54.178463] __sys_sendmmsg+0x1bf/0x4e0 [ 54.182635] __x64_sys_sendmmsg+0x9d/0x100 [ 54.186952] do_syscall_64+0xfd/0x620 [ 54.190902] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.196219] irq event stamp: 184190 [ 54.199840] hardirqs last enabled at (184190): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.209677] hardirqs last disabled at (184189): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 54.219103] softirqs last enabled at (184086): [] _local_bh_enable+0x1c/0x30 [ 54.227959] softirqs last disabled at (184087): [] irq_exit+0x180/0x1d0 [ 54.236273] [ 54.236273] other info that might help us debug this: [ 54.242943] Possible unsafe locking scenario: [ 54.242943] [ 54.248982] CPU0 [ 54.251552] ---- [ 54.254139] lock(&(&local->client_conns_lock)->rlock); [ 54.259590] [ 54.262373] lock(&(&local->client_conns_lock)->rlock); [ 54.268039] [ 54.268039] *** DEADLOCK *** [ 54.268039] [ 54.274127] 1 lock held by swapper/0/0: [ 54.278098] #0: 000000009d5f51a1 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 54.287132] [ 54.287132] stack backtrace: [ 54.291625] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.106-syzkaller #0 [ 54.298709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.308093] Call Trace: [ 54.310671] [ 54.312879] dump_stack+0x197/0x210 [ 54.316547] print_usage_bug.cold+0x330/0x42a [ 54.321094] ? save_stack_trace+0x1a/0x20 [ 54.325252] mark_lock+0xd1b/0x1370 [ 54.328941] ? check_usage_backwards+0x340/0x340 [ 54.333756] __lock_acquire+0xc62/0x49c0 [ 54.337813] ? mark_held_locks+0x100/0x100 [ 54.342049] ? save_stack+0x45/0xd0 [ 54.345665] ? __kasan_slab_free+0x102/0x150 [ 54.350084] ? kasan_slab_free+0xe/0x10 [ 54.354061] ? kfree+0xcf/0x220 [ 54.357366] ? mark_held_locks+0x100/0x100 [ 54.361592] ? find_held_lock+0x35/0x130 [ 54.365846] ? debug_object_deactivate+0x1e4/0x360 [ 54.371002] ? mark_held_locks+0x100/0x100 [ 54.375267] ? debug_object_deactivate+0x1e4/0x360 [ 54.380236] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 54.385436] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 54.390185] lock_acquire+0x16f/0x3f0 [ 54.393998] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.398757] _raw_spin_lock+0x2f/0x40 [ 54.402550] ? rxrpc_put_client_conn+0x683/0xc20 [ 54.407350] rxrpc_put_client_conn+0x683/0xc20 [ 54.411968] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.416726] ? rxrpc_process_call.cold+0x20/0x20 [ 54.421481] rxrpc_rcu_destroy_call+0xbd/0x200 [ 54.426152] rcu_process_callbacks+0xba0/0x1a30 [ 54.430921] ? __rcu_read_unlock+0x170/0x170 [ 54.435377] __do_softirq+0x25c/0x921 [ 54.439182] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.444732] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.450264] irq_exit+0x180/0x1d0 [ 54.453718] smp_apic_timer_interrupt+0x13b/0x550 [ 54.458604] apic_timer_interrupt+0xf/0x20 [ 54.462825] [ 54.465065] RIP: 0010:native_safe_halt+0xe/0x10 [ 54.469725] 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 [ 54.489853] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 54.497550] RAX: 1ffffffff11e4ab4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 54.504832] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 54.512116] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 54.519380] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 54.526649] R13: ffffffff88f25590 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 54.533978] ? default_idle+0x4e/0x320 [ 54.537912] arch_cpu_idle+0xa/0x10 [ 54.541637] default_idle_call+0x36/0x90 [ 54.545712] do_idle+0x30c/0x4d0 [ 54.549078] ? arch_cpu_idle_exit+0x80/0x80 [ 54.553390] ? do_idle+0xf/0x4d0 [ 54.556759] cpu_startup_entry+0xc8/0xe0 [ 54.560906] ? cpu_in_idle+0x20/0x20 [ 54.564636] rest_init+0x219/0x222 [ 54.568182] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 54.574661] start_kernel+0x7ec/0x825 [ 54.578461] ? mem_encrypt_init+0xb/0xb [ 54.582434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.588039] ? x86_family+0x41/0x50 [ 54.591678] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 54.597215] x86_64_start_reservatio