[ 40.777019] audit: type=1800 audit(1582214594.874:32): pid=7829 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 45.716934] kauditd_printk_skb: 2 callbacks suppressed [ 45.716949] audit: type=1400 audit(1582214599.904:35): avc: denied { map } for pid=8003 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 '10.128.0.208' (ECDSA) to the list of known hosts. executing program [ 52.500693] audit: type=1400 audit(1582214606.684:36): avc: denied { map } for pid=8015 comm="syz-executor534" path="/root/syz-executor534113005" 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 [ 52.514789] IPVS: ftp: loaded support on port[0] = 21 [ 52.595859] [ 52.597509] ================================ [ 52.602026] WARNING: inconsistent lock state [ 52.606468] 4.19.105-syzkaller #0 Not tainted [ 52.610943] -------------------------------- [ 52.615335] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 52.621704] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 52.626963] 000000004e289294 (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 52.637321] {SOFTIRQ-ON-W} state was registered at: [ 52.642383] lock_acquire+0x16f/0x3f0 [ 52.646264] _raw_spin_lock+0x2f/0x40 [ 52.650289] rxrpc_connect_call+0x351/0x4920 [ 52.654776] rxrpc_new_client_call+0x8e7/0x1880 [ 52.659691] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 52.664065] rxrpc_sendmsg+0x4a0/0x5b0 [ 52.677430] sock_sendmsg+0xd7/0x130 [ 52.681273] ___sys_sendmsg+0x3e2/0x920 [ 52.685324] __sys_sendmmsg+0x1bf/0x4e0 [ 52.689368] __x64_sys_sendmmsg+0x9d/0x100 [ 52.693672] do_syscall_64+0xfd/0x620 [ 52.697555] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.702808] irq event stamp: 171308 [ 52.706426] hardirqs last enabled at (171308): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 52.716968] hardirqs last disabled at (171307): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 52.726418] softirqs last enabled at (171196): [] _local_bh_enable+0x1c/0x30 [ 52.736002] softirqs last disabled at (171197): [] irq_exit+0x180/0x1d0 [ 52.744313] [ 52.744313] other info that might help us debug this: [ 52.750975] Possible unsafe locking scenario: [ 52.750975] [ 52.757304] CPU0 [ 52.759866] ---- [ 52.762459] lock(&(&local->client_conns_lock)->rlock); [ 52.768070] [ 52.770810] lock(&(&local->client_conns_lock)->rlock); [ 52.776424] [ 52.776424] *** DEADLOCK *** [ 52.776424] [ 52.782473] 1 lock held by swapper/0/0: [ 52.786428] #0: 00000000b684bf77 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 52.795290] [ 52.795290] stack backtrace: [ 52.799789] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.105-syzkaller #0 [ 52.806883] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.816249] Call Trace: [ 52.818827] [ 52.820975] dump_stack+0x197/0x210 [ 52.824589] print_usage_bug.cold+0x330/0x42a [ 52.829071] ? save_stack_trace+0x1a/0x20 [ 52.833355] mark_lock+0xd1b/0x1370 [ 52.837222] ? check_usage_backwards+0x340/0x340 [ 52.842093] __lock_acquire+0xc62/0x49c0 [ 52.846143] ? mark_held_locks+0x100/0x100 [ 52.850369] ? __kasan_slab_free+0x102/0x150 [ 52.854767] ? kasan_slab_free+0xe/0x10 [ 52.858849] ? kmem_cache_free+0x86/0x260 [ 52.862990] ? put_cred_rcu+0x2b6/0x4b0 [ 52.866955] ? mark_held_locks+0x100/0x100 [ 52.871181] ? find_held_lock+0x35/0x130 [ 52.875229] ? debug_object_deactivate+0x1e4/0x360 [ 52.880159] ? mark_held_locks+0x100/0x100 [ 52.884379] ? debug_object_deactivate+0x1e4/0x360 [ 52.889302] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 52.894413] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 52.898995] lock_acquire+0x16f/0x3f0 [ 52.902785] ? rxrpc_put_client_conn+0x683/0xc20 [ 52.907531] _raw_spin_lock+0x2f/0x40 [ 52.911337] ? rxrpc_put_client_conn+0x683/0xc20 [ 52.916082] rxrpc_put_client_conn+0x683/0xc20 [ 52.920665] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 52.925541] ? rxrpc_process_call.cold+0x20/0x20 [ 52.930584] rxrpc_rcu_destroy_call+0xbd/0x200 [ 52.935293] rcu_process_callbacks+0xba0/0x1a30 [ 52.940042] ? __rcu_read_unlock+0x170/0x170 [ 52.944449] __do_softirq+0x25c/0x921 [ 52.948399] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.954210] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.959972] irq_exit+0x180/0x1d0 [ 52.963417] smp_apic_timer_interrupt+0x13b/0x550 [ 52.968255] apic_timer_interrupt+0xf/0x20 [ 52.972493] [ 52.975180] RIP: 0010:native_safe_halt+0xe/0x10 [ 52.980088] 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 [ 52.999351] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 53.007167] RAX: 1ffffffff11e4ad4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 53.014532] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 53.021805] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 53.029213] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 53.036476] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 53.043841] ? default_idle+0x4e/0x320 [ 53.047728] arch_cpu_idle+0xa/0x10 [ 53.051566] default_idle_call+0x36/0x90 [ 53.055722] do_idle+0x30c/0x4d0 [ 53.059080] ? arch_cpu_idle_exit+0x80/0x80 [ 53.063400] ? check_preemption_disabled+0x48/0x290 [ 53.068412] cpu_startup_entry+0xc8/0xe0 [ 53.072471] ? cpu_in_idle+0x20/0x20 [ 53.076236] rest_init+0x219/0x222 [ 53.079767] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 53.086611] start_kernel+0x7ec/0x825 [ 53.090410] ? mem_encrypt_init+0xb/0xb [ 53.094667] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.100210] ? x86_family+0x41/0x50 [ 53.103824] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 53.109470] x86_64_start_reservations+0x29/0x2b [ 53.114273] x86_64_start_kernel+0x77/0x7b [ 53.118646] secondary_startup_64+0xa4/0xb0