[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.154' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   49.407328][ T8471] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
[   49.419230][ T8471] NILFS (loop0): invalid segment: Magic number mismatch
[   49.426217][ T8471] NILFS (loop0): unable to fall back to spare super block
[   49.433341][ T8471] NILFS (loop0): error -22 while searching super root
executing program
[   54.647683][ T8477] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
[   54.659634][ T8477] NILFS (loop0): invalid segment: Magic number mismatch
[   54.667132][ T8477] NILFS (loop0): unable to fall back to spare super block
[   54.674513][ T8477] NILFS (loop0): error -22 while searching super root
executing program
[   59.864782][ T8483] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
[   59.876684][ T8483] NILFS (loop0): invalid segment: Magic number mismatch
[   59.884054][ T8483] NILFS (loop0): unable to fall back to spare super block
[   59.891189][ T8483] NILFS (loop0): error -22 while searching super root
executing program
[   65.074781][ T8489] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024)
[   65.087276][ T8489] NILFS (loop0): invalid segment: Magic number mismatch
[   65.094642][ T8489] NILFS (loop0): unable to fall back to spare super block
[   65.101774][ T8489] NILFS (loop0): error -22 while searching super root
[   66.196539][ T8470] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff88810b4a0060 (size 32):
  comm "syz-executor885", pid 8483, jiffies 4294943250 (age 12.490s)
  hex dump (first 32 bytes):
    6c 6f 6f 70 30 00 00 00 00 00 00 00 00 00 00 00  loop0...........
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<0000000032b9d174>] kstrdup+0x36/0x70
    [<00000000ddff48c5>] kstrdup_const+0x53/0x80
    [<000000009b08a551>] kvasprintf_const+0xc2/0x110
    [<0000000044a97aa4>] kobject_set_name_vargs+0x3b/0xe0
    [<00000000b6f12005>] kobject_init_and_add+0x6d/0xc0
    [<00000000fa2d96f2>] nilfs_sysfs_create_device_group+0x98/0x3a0
    [<000000000ba440fe>] init_nilfs+0x523/0x680
    [<000000000b5b3869>] nilfs_mount+0x51b/0x890
    [<00000000cb5f67c1>] legacy_get_tree+0x2b/0x90
    [<0000000082c0007a>] vfs_get_tree+0x28/0x100
    [<000000000360bc73>] path_mount+0xc5e/0x1170
    [<000000006474dc26>] __x64_sys_mount+0x18e/0x1d0
    [<0000000074facf18>] do_syscall_64+0x2d/0x70
    [<0000000022546e34>] entry_SYSCALL_64_after_hwframe+0x44/0xa9