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mnt: If fs_fully_visible fails call put_filesystem.

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Add this trivial missing error handling.

Cc: stable@vger.kernel.org
Fixes: 1b852bceb0 ("mnt: Refactor the logic for mounting sysfs and proc in a user namespace")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2016-06-06 15:36:07 -05:00
parent af8c34ce6a
commit 97c1df3e54
1 changed files with 3 additions and 1 deletions
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4
fs/namespace.c
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@ -2409,8 +2409,10 @@ static int do_new_mount(struct path *path, const char *fstype, int flags,
mnt_flags |= MNT_NODEV | MNT_LOCK_NODEV; mnt_flags |= MNT_NODEV | MNT_LOCK_NODEV;
} }
if (type->fs_flags & FS_USERNS_VISIBLE) { if (type->fs_flags & FS_USERNS_VISIBLE) {
if (!fs_fully_visible(type, &mnt_flags)) if (!fs_fully_visible(type, &mnt_flags)) {
put_filesystem(type);
return -EPERM; return -EPERM;
}
} }
} }