[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 107.023630][ T27] audit: type=1400 audit(1579979071.623:37): avc: denied { watch } for pid=10499 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [....] 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: [ 112.155045][ T27] kauditd_printk_skb: 3 callbacks suppressed [ 112.155061][ T27] audit: type=1400 audit(1579979076.753:41): avc: denied { map } for pid=10586 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 '10.128.0.86' (ECDSA) to the list of known hosts. executing program [ 251.873323][ T27] audit: type=1400 audit(1579979216.473:42): avc: denied { map } for pid=10598 comm="syz-executor681" path="/root/syz-executor681253388" 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 [ 251.902316][ T27] audit: type=1400 audit(1579979216.473:43): avc: denied { create } for pid=10598 comm="syz-executor681" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 251.928209][ T27] audit: type=1400 audit(1579979216.483:44): avc: denied { write } for pid=10598 comm="syz-executor681" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 356.946874][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 356.954233][ C1] rcu: 1-....: (1 GPs behind) idle=a42/1/0x4000000000000002 softirq=20045/20048 fqs=5201 [ 356.964465][ C1] (t=10500 jiffies g=11285 q=1859) [ 356.970423][ C1] NMI backtrace for cpu 1 [ 356.974759][ C1] CPU: 1 PID: 10598 Comm: syz-executor681 Not tainted 5.5.0-rc7-syzkaller #0 [ 356.984646][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 356.994825][ C1] Call Trace: [ 356.998099][ C1] [ 357.001475][ C1] dump_stack+0x197/0x210 [ 357.005822][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 357.011882][ C1] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 357.017587][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 357.023675][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 357.029679][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 357.035159][ C1] ? find_next_bit+0x107/0x130 [ 357.040052][ C1] rcu_sched_clock_irq.cold+0x509/0xc0d [ 357.045720][ C1] ? raise_softirq+0x138/0x340 [ 357.050503][ C1] update_process_times+0x2d/0x70 [ 357.055563][ C1] tick_sched_handle+0xa2/0x190 [ 357.060565][ C1] tick_sched_timer+0x53/0x140 [ 357.065380][ C1] __hrtimer_run_queues+0x364/0xe40 [ 357.070577][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 357.075869][ C1] ? hrtimer_init+0x330/0x330 [ 357.080638][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 357.086356][ C1] ? ktime_get_update_offsets_now+0x2ce/0x430 [ 357.092426][ C1] hrtimer_interrupt+0x314/0x770 [ 357.097412][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 357.103172][ C1] apic_timer_interrupt+0xf/0x20 [ 357.108303][ C1] [ 357.111270][ C1] RIP: 0010:debug_lockdep_rcu_enabled+0x1f/0xa0 [ 357.117665][ C1] Code: 00 66 2e 0f 1f 84 00 00 00 00 00 48 c7 c0 f0 4e 7b 8a 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 89 e5 48 c1 e9 03 <83> c0 03 0f b6 14 11 38 d0 7c 04 84 d2 75 49 8b 15 4c 1e 1a 09 85 [ 357.137578][ C1] RSP: 0018:ffffc90001e66f00 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 [ 357.146240][ C1] RAX: 0000000000000000 RBX: 0000000000000014 RCX: 1ffffffff14f69de [ 357.154394][ C1] RDX: dffffc0000000000 RSI: ffffffff8676b1e9 RDI: ffff888095048008 [ 357.162489][ C1] RBP: ffffc90001e66f00 R08: ffff88808f85a080 R09: ffffc90001e66f28 [ 357.170453][ C1] R10: fffff520003ccde7 R11: ffffc90001e66f3f R12: 0000000000000001 [ 357.178424][ C1] R13: 00000000ffffffff R14: ffffc90001e67030 R15: ffff888095048000 [ 357.186451][ C1] ? hash_ip4_del+0xb9/0xce0 [ 357.191043][ C1] hash_ip4_del+0x1ba/0xce0 [ 357.195559][ C1] ? hash_ip4_uadt+0x4dc/0x7a0 [ 357.200372][ C1] hash_ip4_uadt+0x546/0x7a0 [ 357.204957][ C1] ? hash_ip6_del+0xe70/0xe70 [ 357.209640][ C1] ? hash_ip6_uadt+0x670/0x670 [ 357.214818][ C1] ? __kasan_check_write+0x14/0x20 [ 357.219990][ C1] call_ad+0x1a0/0x5a0 [ 357.224112][ C1] ? start_msg+0x220/0x220 [ 357.228603][ C1] ? nla_memcpy+0xb0/0xb0 [ 357.232932][ C1] ? __nla_parse+0x43/0x60 [ 357.237367][ C1] ip_set_ad.isra.0+0x572/0xb20 [ 357.242248][ C1] ? ip_set_nfnl_get_byindex+0x460/0x460 [ 357.247893][ C1] ? nla_memcpy+0xb0/0xb0 [ 357.252534][ C1] ? lock_downgrade+0x920/0x920 [ 357.257382][ C1] ip_set_udel+0x3a/0x50 [ 357.261611][ C1] ? ip_set_ad.isra.0+0xb20/0xb20 [ 357.266700][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 357.271825][ C1] ? nfnetlink_bind+0x2c0/0x2c0 [ 357.276727][ C1] ? avc_has_extended_perms+0x10f0/0x10f0 [ 357.282496][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 357.288729][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 357.295017][ C1] ? cred_has_capability+0x199/0x330 [ 357.300417][ C1] ? selinux_sb_eat_lsm_opts+0x700/0x700 [ 357.306083][ C1] ? selinux_sb_eat_lsm_opts+0x700/0x700 [ 357.311722][ C1] ? enable_cpucache.cold+0x11/0x1e [ 357.316986][ C1] ? __lock_acquire+0x8a0/0x4a00 [ 357.321922][ C1] netlink_rcv_skb+0x177/0x450 [ 357.326915][ C1] ? nfnetlink_bind+0x2c0/0x2c0 [ 357.331777][ C1] ? netlink_ack+0xb50/0xb50 [ 357.336416][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 357.342711][ C1] ? ns_capable_common+0x93/0x100 [ 357.347837][ C1] ? ns_capable+0x20/0x30 [ 357.352205][ C1] ? __netlink_ns_capable+0x104/0x140 [ 357.357580][ C1] nfnetlink_rcv+0x1ba/0x460 [ 357.362197][ C1] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 357.367644][ C1] ? netlink_deliver_tap+0x24a/0xbe0 [ 357.372987][ C1] ? __kasan_check_write+0x14/0x20 [ 357.378102][ C1] netlink_unicast+0x58c/0x7d0 [ 357.383002][ C1] ? netlink_attachskb+0x870/0x870 [ 357.388103][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 357.394502][ C1] netlink_sendmsg+0x91c/0xea0 [ 357.399277][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 357.404319][ C1] ? tomoyo_socket_sendmsg+0x26/0x30 [ 357.409612][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 357.415893][ C1] ? security_socket_sendmsg+0x8d/0xc0 [ 357.421439][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 357.426432][ C1] sock_sendmsg+0xd7/0x130 [ 357.430847][ C1] ____sys_sendmsg+0x753/0x880 [ 357.435594][ C1] ? kernel_sendmsg+0x50/0x50 [ 357.440341][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 357.446505][ C1] ___sys_sendmsg+0x100/0x170 [ 357.451818][ C1] ? sendmsg_copy_msghdr+0x70/0x70 [ 357.456921][ C1] ? __kasan_check_read+0x11/0x20 [ 357.462045][ C1] ? __lock_acquire+0x8a0/0x4a00 [ 357.467186][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 357.473488][ C1] ? __this_cpu_preempt_check+0x35/0x190 [ 357.479119][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 357.485341][ C1] ? percpu_counter_add_batch+0x13c/0x190 [ 357.491343][ C1] ? __fd_install+0x1bc/0x640 [ 357.496006][ C1] ? find_held_lock+0x35/0x130 [ 357.500760][ C1] ? __fd_install+0x1bc/0x640 [ 357.505426][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 357.511701][ C1] ? __fget_light+0x1a9/0x230 [ 357.516363][ C1] ? __fdget+0x1b/0x20 [ 357.520423][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 357.526662][ C1] __sys_sendmsg+0x105/0x1d0 [ 357.531250][ C1] ? __sys_sendmsg_sock+0xc0/0xc0 [ 357.536666][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 357.542124][ C1] ? do_syscall_64+0x26/0x790 [ 357.546839][ C1] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 357.552991][ C1] ? do_syscall_64+0x26/0x790 [ 357.558157][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 357.562919][ C1] do_syscall_64+0xfa/0x790 [ 357.567422][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 357.573334][ C1] RIP: 0033:0x440509 [ 357.577360][ C1] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 357.596956][ C1] RSP: 002b:00007ffc6873ffd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 357.605360][ C1] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440509 [ 357.613316][ C1] RDX: 0000000000000040 RSI: 0000000020000080 RDI: 0000000000000004 [ 357.621277][ C1] RBP: 00000000006ca018 R08: 0000000000000018 R09: 00000000004002c8 [ 357.629254][ C1] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000401d90 [ 357.637221][ C1] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000