Starting Permit User Sessions...
         Starting OpenBSD Secure Shell server...
[  OK  ] Started Permit User Sessions.
[  OK  ] Started Getty on tty4.
[  OK  ] Started Getty on tty3.
[  OK  ] Started Getty on tty1.
[  OK  ] Started Getty on tty6.
[  OK  ] Started Getty on tty5.
[  OK  ] Started Getty on tty2.
[  OK  ] Started OpenBSD Secure Shell server.
Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts.
executing program
[*     ] A start job is running for dev-ttyS0.device (8s / 1min 30s)[**    ] A start job is running for dev-ttyS0.device (9s / 1min 30s)[***   ] A start job is running for dev-ttyS0.device (9s / 1min 30s)[ ***  ] A start job is running for dev-ttyS0.device (10s / 1min 30s)[  *** ] A start job is running for dev-ttyS0.device (10s / 1min 30s)[   ***] A start job is running for dev-ttyS0.device (11s / 1min 30s)[    **] A start job is running for dev-ttyS0.device (12s / 1min 30s)[     *] A start job is running for dev-ttyS0.device (12s / 1min 30s)[   19.584001][   T22] audit: type=1400 audit(1626003915.669:8): avc:  denied  { execmem } for  pid=334 comm="syz-executor734" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   19.616570][  T336] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
[   19.626164][  T336] EXT4-fs error (device loop0): __ext4_new_inode:930: comm syz-executor734: reserved inode found cleared - inode=1
[   19.639250][  T336] incfs: Can't find or create .index dir in ./file0
[   19.646678][  T336] BUG: Dentry ffff8881ecac8330{i=0,n=.index}  still in use (1) [unmount of ext4 loop0]
[   19.656478][  T336] ------------[ cut here ]------------
[   19.661937][  T336] WARNING: CPU: 0 PID: 336 at fs/dcache.c:1597 umount_check+0x179/0x1c0
[   19.670322][  T336] Modules linked in:
[   19.674205][  T336] CPU: 0 PID: 336 Comm: syz-executor734 Not tainted 5.4.125-syzkaller-00003-g9c09b1ce4b07 #0
[   19.684408][  T336] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   19.694438][  T336] RIP: 0010:umount_check+0x179/0x1c0
[   19.699700][  T336] Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 a0 07 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 a7 a3 af ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff
[   19.719355][  T336] RSP: 0018:ffff8881e5fe7a58 EFLAGS: 00010282
[   19.725386][  T336] RAX: 0000000000000054 RBX: ffffffff85faa080 RCX: 8b398d057cbfc600
[   19.733338][  T336] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
[   19.741288][  T336] RBP: ffff8881eed57420 R08: ffffffff814e90a7 R09: ffffed103edc9608
[   19.749314][  T336] R10: ffffed103edc9608 R11: 0000000000000000 R12: dffffc0000000000
[   19.757254][  T336] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881ecac8330
[   19.765196][  T336] FS:  000000000075f300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
[   19.774100][  T336] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   19.780650][  T336] CR2: 00000000004b51d0 CR3: 0000000005e0e000 CR4: 00000000001406f0
[   19.788605][  T336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   19.796543][  T336] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   19.804478][  T336] Call Trace:
[   19.807739][  T336]  d_walk+0x2d9/0x540
[   19.811683][  T336]  ? __d_free+0x20/0x20
[   19.815804][  T336]  shrink_dcache_for_umount+0x8a/0x1a0
[   19.821310][  T336]  generic_shutdown_super+0x63/0x2a0
[   19.826577][  T336]  kill_block_super+0x79/0xd0
[   19.831246][  T336]  deactivate_locked_super+0xaf/0x100
[   19.836606][  T336]  deactivate_super+0x1b3/0x270
[   19.841428][  T336]  ? deactivate_locked_super+0x100/0x100
[   19.847039][  T336]  ? dput+0x4de/0x5d0
[   19.851508][  T336]  ? _raw_spin_lock_irq+0xa4/0x1b0
[   19.856585][  T336]  ? find_next_bit+0xc6/0x110
[   19.861229][  T336]  cleanup_mnt+0x432/0x4e0
[   19.865631][  T336]  task_work_run+0x186/0x1b0
[   19.870195][  T336]  do_exit+0xcb9/0x2bf0
[   19.874405][  T336]  ? mm_update_next_owner+0x5c0/0x5c0
[   19.879743][  T336]  ? __up_read+0x6f/0x1b0
[   19.884039][  T336]  ? __down_read+0x210/0x210
[   19.888594][  T336]  ? check_preemption_disabled+0x154/0x330
[   19.894363][  T336]  ? debug_smp_processor_id+0x20/0x20
[   19.899710][  T336]  do_group_exit+0x15c/0x2c0
[   19.904271][  T336]  ? do_user_addr_fault+0x6b0/0xb40
[   19.909431][  T336]  __do_sys_exit_group+0x13/0x20
[   19.914337][  T336]  __se_sys_exit_group+0x10/0x10
[   19.919502][  T336]  __x64_sys_exit_group+0x37/0x40
[   19.924506][  T336]  do_syscall_64+0xcb/0x1e0
[   19.929070][  T336]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   19.935014][  T336] RIP: 0033:0x442f59
[   19.938898][  T336] Code: Bad RIP value.
[   19.942931][  T336] RSP: 002b:00007fff84ea26f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   19.951307][  T336] RAX: ffffffffffffffda RBX: 00000000004b42f0 RCX: 0000000000442f59
[   19.959246][  T336] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
[   19.967184][  T336] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00000000004af000
[   19.975125][  T336] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004b42f0
[   19.983162][  T336] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
[   19.991105][  T336] ---[ end trace aae67c2b33ceab49 ]---
[   20.004216][  T336] VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds.  Have a nice day...