[ 44.154670] audit: type=1800 audit(1582130095.931:32): pid=7973 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 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: [ 48.626422] kauditd_printk_skb: 2 callbacks suppressed [ 48.626434] audit: type=1400 audit(1582130100.481:35): avc: denied { map } for pid=8147 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 '10.128.0.143' (ECDSA) to the list of known hosts. executing program [ 55.412617] audit: type=1400 audit(1582130107.271:36): avc: denied { map } for pid=8159 comm="syz-executor287" path="/root/syz-executor287174597" 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 [ 55.435917] IPVS: ftp: loaded support on port[0] = 21 [ 55.506474] [ 55.508414] ================================ [ 55.512809] WARNING: inconsistent lock state [ 55.517389] 4.19.104-syzkaller #0 Not tainted [ 55.521867] -------------------------------- [ 55.526325] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 55.532470] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 55.537765] 00000000f90aaded (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x683/0xc20 [ 55.549358] {SOFTIRQ-ON-W} state was registered at: [ 55.554400] lock_acquire+0x16f/0x3f0 [ 55.558283] _raw_spin_lock+0x2f/0x40 [ 55.562157] rxrpc_connect_call+0x351/0x4920 [ 55.566653] rxrpc_new_client_call+0x8e7/0x1880 [ 55.571510] rxrpc_do_sendmsg+0xfc3/0x1ca3 [ 55.575937] rxrpc_sendmsg+0x4a0/0x5b0 [ 55.579896] sock_sendmsg+0xd7/0x130 [ 55.583695] ___sys_sendmsg+0x3e2/0x920 [ 55.587787] __sys_sendmmsg+0x1bf/0x4e0 [ 55.591970] __x64_sys_sendmmsg+0x9d/0x100 [ 55.596298] do_syscall_64+0xfd/0x620 [ 55.600187] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.605449] irq event stamp: 178776 [ 55.609288] hardirqs last enabled at (178776): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 55.619076] hardirqs last disabled at (178775): [] _raw_spin_lock_irqsave+0x6f/0xcd [ 55.628622] softirqs last enabled at (178664): [] _local_bh_enable+0x1c/0x30 [ 55.637505] softirqs last disabled at (178665): [] irq_exit+0x180/0x1d0 [ 55.646428] [ 55.646428] other info that might help us debug this: [ 55.653116] Possible unsafe locking scenario: [ 55.653116] [ 55.659214] CPU0 [ 55.661844] ---- [ 55.664540] lock(&(&local->client_conns_lock)->rlock); [ 55.669979] [ 55.672717] lock(&(&local->client_conns_lock)->rlock); [ 55.678326] [ 55.678326] *** DEADLOCK *** [ 55.678326] [ 55.684774] 1 lock held by swapper/0/0: [ 55.688938] #0: 00000000fd4bf1e6 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 [ 55.697757] [ 55.697757] stack backtrace: [ 55.702388] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.104-syzkaller #0 [ 55.709484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.719608] Call Trace: [ 55.722184] [ 55.724329] dump_stack+0x197/0x210 [ 55.728116] print_usage_bug.cold+0x330/0x42a [ 55.732616] ? save_stack_trace+0x1a/0x20 [ 55.736812] mark_lock+0xd1b/0x1370 [ 55.740441] ? check_usage_backwards+0x340/0x340 [ 55.745268] __lock_acquire+0xc62/0x49c0 [ 55.749376] ? mark_held_locks+0x100/0x100 [ 55.753597] ? save_stack+0x45/0xd0 [ 55.757278] ? __kasan_slab_free+0x102/0x150 [ 55.762297] ? kasan_slab_free+0xe/0x10 [ 55.766326] ? kfree+0xcf/0x220 [ 55.769736] ? mark_held_locks+0x100/0x100 [ 55.773955] ? find_held_lock+0x35/0x130 [ 55.778012] ? debug_object_deactivate+0x1e4/0x360 [ 55.783408] ? mark_held_locks+0x100/0x100 [ 55.787642] ? debug_object_deactivate+0x1e4/0x360 [ 55.792685] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 55.797886] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 55.802597] lock_acquire+0x16f/0x3f0 [ 55.806442] ? rxrpc_put_client_conn+0x683/0xc20 [ 55.811200] _raw_spin_lock+0x2f/0x40 [ 55.814995] ? rxrpc_put_client_conn+0x683/0xc20 [ 55.819746] rxrpc_put_client_conn+0x683/0xc20 [ 55.824351] ? rxrpc_rcu_destroy_call+0xbd/0x200 [ 55.829110] ? rxrpc_process_call.cold+0x20/0x20 [ 55.834002] rxrpc_rcu_destroy_call+0xbd/0x200 [ 55.838583] rcu_process_callbacks+0xba0/0x1a30 [ 55.843362] ? __rcu_read_unlock+0x170/0x170 [ 55.847773] __do_softirq+0x25c/0x921 [ 55.851559] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.857105] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.862652] irq_exit+0x180/0x1d0 [ 55.866107] smp_apic_timer_interrupt+0x13b/0x550 [ 55.870956] apic_timer_interrupt+0xf/0x20 [ 55.875172] [ 55.877409] RIP: 0010:native_safe_halt+0xe/0x10 [ 55.882074] 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 [ 55.901022] RSP: 0018:ffffffff88e07cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 55.908913] RAX: 1ffffffff11e4ad4 RBX: ffffffff88e79ec0 RCX: 0000000000000000 [ 55.916595] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e7a73c [ 55.923858] RBP: ffffffff88e07ce0 R08: ffffffff88e79ec0 R09: 0000000000000000 [ 55.931426] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 55.938821] R13: ffffffff88f25690 R14: 0000000000000000 R15: ffffffff88e79ec0 [ 55.946265] ? default_idle+0x4e/0x320 [ 55.950270] arch_cpu_idle+0xa/0x10 [ 55.953893] default_idle_call+0x36/0x90 [ 55.958002] do_idle+0x30c/0x4d0 [ 55.961358] ? arch_cpu_idle_exit+0x80/0x80 [ 55.965674] ? check_preemption_disabled+0x48/0x290 [ 55.970693] cpu_startup_entry+0xc8/0xe0 [ 55.974747] ? cpu_in_idle+0x20/0x20 [ 55.978460] rest_init+0x219/0x222 [ 55.982000] ? trace_event_define_fields_vector_free_moved+0xb4/0xb4 [ 55.988795] start_kernel+0x7ec/0x825 [ 55.992947] ? mem_encrypt_init+0xb/0xb [ 55.996917] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.002442] ? x86_family+0x41/0x50 [ 56.006065] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 56.011717] x86_64_start_reservations+0x29/0x2b [ 56.016580] x86_64_start_kernel+0x77/0x7b [ 56.020817] secondary_startup_64+0xa4/0xb0