Warning: Permanently added '10.128.0.237' (ECDSA) to the list of known hosts. [ 643.153012] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 643.278151] audit: type=1400 audit(1581344990.298:36): avc: denied { map } for pid=7504 comm="syz-executor745" path="/root/syz-executor745056141" 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 [ 643.308704] XFS (loop0): Mounting V4 Filesystem [ 643.314680] XFS (loop0): Log size 50331648 blocks too large, maximum size is 1048576 blocks [ 643.323497] XFS (loop0): Log size out of supported range. [ 643.329057] XFS (loop0): Continuing onwards, but if log hangs are experienced then please report this message in the bug report. [ 643.341585] XFS (loop0): totally zeroed log [ 643.347056] XFS (loop0): failed to read root inode [ 858.070397] INFO: task syz-executor745:7504 blocked for more than 140 seconds. [ 858.078050] Not tainted 4.14.170-syzkaller #0 [ 858.083229] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.091394] syz-executor745 D27376 7504 7502 0x00000000 [ 858.097202] Call Trace: [ 858.099803] __schedule+0x7b8/0x1cd0 [ 858.103579] ? firmware_map_remove+0x196/0x196 [ 858.108173] schedule+0x92/0x1c0 [ 858.111631] xlog_grant_head_wait+0x135/0xc10 [ 858.116148] xlog_grant_head_check+0x374/0x3c0 [ 858.120796] ? xlog_grant_head_wait+0xc10/0xc10 [ 858.125474] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 858.131295] xfs_log_reserve+0x305/0xa20 [ 858.135380] ? xfs_log_quiesce+0x174/0xa10 [ 858.139778] ? xlog_ticket_alloc+0x430/0x430 [ 858.144335] ? xfs_buf_unlock+0x5c/0x2c0 [ 858.148408] xfs_log_quiesce+0x30e/0xa10 [ 858.152574] ? xfs_log_reserve+0xa20/0xa20 [ 858.156953] ? xfs_warn+0x13b/0x163 [ 858.160939] ? xfs_err+0x163/0x163 [ 858.164496] ? prandom_u32+0x74/0xa0 [ 858.168234] xfs_log_unmount+0x22/0xb0 [ 858.172208] xfs_log_mount_cancel+0x47/0x60 [ 858.176536] xfs_mountfs+0x12ad/0x2170 [ 858.181204] ? xfs_default_resblks+0x60/0x60 [ 858.185753] ? xfs_mru_cache_create+0x456/0x570 [ 858.190486] ? xfs_filestream_get_parent+0xc0/0xc0 [ 858.195428] xfs_fs_fill_super+0xb94/0x1380 [ 858.199745] ? set_bdev_super+0x120/0x120 [ 858.204002] mount_bdev+0x2be/0x370 [ 858.207676] ? xfs_test_remount_options.isra.0+0x90/0x90 [ 858.213208] xfs_fs_mount+0x35/0x40 [ 858.216839] mount_fs+0x97/0x2a1 [ 858.220441] vfs_kern_mount.part.0+0x5e/0x3d0 [ 858.225142] do_mount+0x417/0x27d0 [ 858.228666] ? copy_mount_options+0x5c/0x2f0 [ 858.233311] ? rcu_read_lock_sched_held+0x110/0x130 [ 858.238333] ? copy_mount_string+0x40/0x40 [ 858.242671] ? copy_mount_options+0x1fe/0x2f0 [ 858.247181] SyS_mount+0xab/0x120 [ 858.250807] ? copy_mnt_ns+0x8c0/0x8c0 [ 858.254697] do_syscall_64+0x1e8/0x640 [ 858.258571] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 858.263547] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 858.268741] RIP: 0033:0x44721a [ 858.272111] RSP: 002b:00007ffc7fe044b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 [ 858.279827] RAX: ffffffffffffffda RBX: 00007ffc7fe04690 RCX: 000000000044721a [ 858.287343] RDX: 00007ffc7fe04500 RSI: 0000000020000140 RDI: 00007ffc7fe04520 [ 858.294692] RBP: 0000000000000000 R08: 00007ffc7fe04560 R09: 0000000000000000 [ 858.302013] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000402500 [ 858.309285] R13: 0000000000402590 R14: 0000000000000000 R15: 0000000000000000 [ 858.317300] [ 858.317300] Showing all locks held in the system: [ 858.323705] 1 lock held by khungtaskd/1035: [ 858.328157] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f [ 858.337671] 2 locks held by getty/7482: [ 858.341665] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.350441] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 858.359967] 2 locks held by getty/7483: [ 858.364021] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.372786] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 858.382130] 2 locks held by getty/7484: [ 858.386161] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.394928] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 858.404338] 2 locks held by getty/7485: [ 858.408462] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.417434] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 858.426769] 2 locks held by getty/7486: [ 858.430807] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.439503] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 858.448896] 2 locks held by getty/7487: [ 858.452958] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.461718] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 858.471147] 2 locks held by getty/7488: [ 858.475116] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 858.484055] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 858.493636] 1 lock held by syz-executor745/7504: [ 858.498431] #0: (&type->s_umount_key#51/1){+.+.}, at: [] sget_userns+0x551/0xc30 [ 858.507851] [ 858.509480] ============================================= [ 858.509480] [ 858.516941] NMI backtrace for cpu 0 [ 858.520621] CPU: 0 PID: 1035 Comm: khungtaskd Not tainted 4.14.170-syzkaller #0 [ 858.528082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 858.537548] Call Trace: [ 858.540138] dump_stack+0x142/0x197 [ 858.543768] nmi_cpu_backtrace.cold+0x57/0x94 [ 858.548715] ? irq_force_complete_move.cold+0x7d/0x7d [ 858.554034] nmi_trigger_cpumask_backtrace+0x141/0x189 [ 858.559317] arch_trigger_cpumask_backtrace+0x14/0x20 [ 858.564507] watchdog+0x5e7/0xb90 [ 858.567971] kthread+0x319/0x430 [ 858.571330] ? hungtask_pm_notify+0x50/0x50 [ 858.575686] ? kthread_create_on_node+0xd0/0xd0 [ 858.580411] ret_from_fork+0x24/0x30 [ 858.584255] Sending NMI from CPU 0 to CPUs 1: [ 858.588971] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff866933be [ 858.589931] Kernel panic - not syncing: hung_task: blocked tasks [ 858.602416] CPU: 0 PID: 1035 Comm: khungtaskd Not tainted 4.14.170-syzkaller #0 [ 858.610019] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 858.622063] Call Trace: [ 858.624654] dump_stack+0x142/0x197 [ 858.628281] panic+0x1f9/0x42d [ 858.631459] ? add_taint.cold+0x16/0x16 [ 858.635426] ? ___preempt_schedule+0x16/0x18 [ 858.639839] watchdog+0x5f8/0xb90 [ 858.643354] kthread+0x319/0x430 [ 858.646703] ? hungtask_pm_notify+0x50/0x50 [ 858.651241] ? kthread_create_on_node+0xd0/0xd0 [ 858.655911] ret_from_fork+0x24/0x30 [ 858.661536] Kernel Offset: disabled [ 858.665185] Rebooting in 86400 seconds..