[ 94.234058][ T27] audit: type=1800 audit(1582598037.647:36): pid=10849 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=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 95.006782][ T27] audit: type=1400 audit(1582598038.557:37): avc: denied { watch } for pid=10941 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 Warning: Permanently added '10.128.0.255' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 405.018553][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 405.018568][ T27] audit: type=1400 audit(1582598348.577:42): avc: denied { map } for pid=11039 comm="syz-executor236" path="/root/syz-executor236596210" 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 [ 560.216709][ T1114] INFO: task syz-executor236:11039 blocked for more than 143 seconds. [ 560.225238][ T1114] Not tainted 5.6.0-rc3-syzkaller #0 [ 560.231185][ T1114] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 560.240101][ T1114] syz-executor236 D27248 11039 11037 0x00000000 [ 560.246424][ T1114] Call Trace: [ 560.249937][ T1114] __schedule+0x934/0x1f90 [ 560.254432][ T1114] ? firmware_map_remove+0x1a3/0x1a3 [ 560.260121][ T1114] ? lockdep_hardirqs_on+0x421/0x5e0 [ 560.265502][ T1114] ? __lock_sock+0x160/0x290 [ 560.270417][ T1114] ? trace_hardirqs_on+0x67/0x240 [ 560.275517][ T1114] schedule+0xdc/0x2b0 [ 560.279752][ T1114] __lock_sock+0x165/0x290 [ 560.284185][ T1114] ? __sk_dst_check+0x2e0/0x2e0 [ 560.289245][ T1114] ? finish_wait+0x260/0x260 [ 560.294436][ T1114] lock_sock_nested+0xfe/0x120 [ 560.299407][ T1114] virtio_transport_release+0xc4/0xd60 [ 560.304995][ T1114] ? virtio_transport_close_timeout+0x220/0x220 [ 560.311461][ T1114] ? rcu_read_lock_held+0x9c/0xb0 [ 560.316690][ T1114] ? __kasan_check_read+0x11/0x20 [ 560.321789][ T1114] vsock_assign_transport+0xf3/0x3b0 [ 560.327379][ T1114] vsock_stream_connect+0x2b3/0xc70 [ 560.332890][ T1114] ? tomoyo_socket_listen_permission+0x3b0/0x3b0 [ 560.339365][ T1114] ? vsock_dgram_connect+0x470/0x470 [ 560.344681][ T1114] ? _raw_spin_unlock_bh+0x2c/0x30 [ 560.349947][ T1114] ? finish_wait+0x260/0x260 [ 560.354586][ T1114] ? tomoyo_socket_connect+0x26/0x30 [ 560.360104][ T1114] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 560.366429][ T1114] __sys_connect_file+0x161/0x1c0 [ 560.371733][ T1114] ? move_addr_to_kernel.part.0+0xcd/0x110 [ 560.377645][ T1114] __sys_connect+0x174/0x1b0 [ 560.382253][ T1114] ? __sys_connect_file+0x1c0/0x1c0 [ 560.387622][ T1114] ? up_read+0x1cd/0x810 [ 560.391960][ T1114] ? down_read_non_owner+0x490/0x490 [ 560.397392][ T1114] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 560.402884][ T1114] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 560.408721][ T1114] ? do_syscall_64+0x26/0x790 [ 560.413425][ T1114] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 560.419701][ T1114] ? do_syscall_64+0x26/0x790 [ 560.424406][ T1114] __x64_sys_connect+0x73/0xb0 [ 560.429300][ T1114] do_syscall_64+0xfa/0x790 [ 560.433830][ T1114] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 560.439828][ T1114] RIP: 0033:0x4401b9 [ 560.443910][ T1114] Code: Bad RIP value. [ 560.448102][ T1114] RSP: 002b:00007ffeb6a237c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 560.456614][ T1114] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401b9 [ 560.464686][ T1114] RDX: 0000000000000010 RSI: 0000000020000440 RDI: 0000000000000003 [ 560.472831][ T1114] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 560.481025][ T1114] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 560.489251][ T1114] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 560.497562][ T1114] [ 560.497562][ T1114] Showing all locks held in the system: [ 560.505374][ T1114] 1 lock held by khungtaskd/1114: [ 560.510562][ T1114] #0: ffffffff89bac280 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 560.520021][ T1114] 1 lock held by rsyslogd/10887: [ 560.524957][ T1114] #0: ffff8880a8e275e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 560.533801][ T1114] 2 locks held by getty/11009: [ 560.538656][ T1114] #0: ffff88809711d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 560.547863][ T1114] #1: ffffc9000184b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 560.560526][ T1114] 2 locks held by getty/11010: [ 560.565344][ T1114] #0: ffff8880a9a72090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 560.574462][ T1114] #1: ffffc9000186b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 560.584217][ T1114] 2 locks held by getty/11011: [ 560.589113][ T1114] #0: ffff88809826b090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 560.598161][ T1114] #1: ffffc9000187b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 560.607848][ T1114] 2 locks held by getty/11012: [ 560.612734][ T1114] #0: ffff8880972e2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 560.621895][ T1114] #1: ffffc9000185b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 560.631823][ T1114] 2 locks held by getty/11013: [ 560.636699][ T1114] #0: ffff8880a7644090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 560.645667][ T1114] #1: ffffc9000180b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 560.655465][ T1114] 2 locks held by getty/11014: [ 560.660446][ T1114] #0: ffff8880982b1090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 560.669680][ T1114] #1: ffffc9000188b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 560.679460][ T1114] 2 locks held by getty/11015: [ 560.684223][ T1114] #0: ffff888093d9d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 560.693291][ T1114] #1: ffffc900017cf2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 560.703489][ T1114] 1 lock held by syz-executor236/11039: [ 560.709105][ T1114] #0: ffff8880a1de98d0 (sk_lock-AF_VSOCK){+.+.}, at: vsock_stream_connect+0xfb/0xc70 [ 560.719043][ T1114] [ 560.721371][ T1114] ============================================= [ 560.721371][ T1114] [ 560.729952][ T1114] NMI backtrace for cpu 1 [ 560.734441][ T1114] CPU: 1 PID: 1114 Comm: khungtaskd Not tainted 5.6.0-rc3-syzkaller #0 [ 560.742812][ T1114] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 560.753116][ T1114] Call Trace: [ 560.757137][ T1114] dump_stack+0x197/0x210 [ 560.761477][ T1114] nmi_cpu_backtrace.cold+0x70/0xb2 [ 560.766746][ T1114] ? vprintk_func+0x86/0x189 [ 560.771424][ T1114] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 560.777412][ T1114] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 560.783416][ T1114] arch_trigger_cpumask_backtrace+0x14/0x20 [ 560.789324][ T1114] watchdog+0xb11/0x10c0 [ 560.793657][ T1114] kthread+0x361/0x430 [ 560.797737][ T1114] ? reset_hung_task_detector+0x30/0x30 [ 560.803344][ T1114] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 560.809079][ T1114] ret_from_fork+0x24/0x30 [ 560.813651][ T1114] Sending NMI from CPU 1 to CPUs 0: [ 560.819030][ C0] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 [ 560.819952][ T1114] Kernel panic - not syncing: hung_task: blocked tasks [ 560.834189][ T1114] CPU: 1 PID: 1114 Comm: khungtaskd Not tainted 5.6.0-rc3-syzkaller #0 [ 560.842709][ T1114] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 560.852760][ T1114] Call Trace: [ 560.856103][ T1114] dump_stack+0x197/0x210 [ 560.861448][ T1114] panic+0x2e3/0x75c [ 560.865336][ T1114] ? add_taint.cold+0x16/0x16 [ 560.870258][ T1114] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 560.876184][ T1114] ? printk_safe_flush+0xf2/0x140 [ 560.881212][ T1114] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 560.887539][ T1114] ? nmi_trigger_cpumask_backtrace+0x224/0x28b [ 560.893708][ T1114] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 560.899982][ T1114] watchdog+0xb22/0x10c0 [ 560.904245][ T1114] kthread+0x361/0x430 [ 560.908318][ T1114] ? reset_hung_task_detector+0x30/0x30 [ 560.913998][ T1114] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 560.919759][ T1114] ret_from_fork+0x24/0x30 [ 560.926080][ T1114] Kernel Offset: disabled [ 560.930510][ T1114] Rebooting in 86400 seconds..