mnt: If fs_fully_visible fails call put_filesystem.
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>
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@ -2409,8 +2409,10 @@ static int do_new_mount(struct path *path, const char *fstype, int flags,
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mnt_flags |= MNT_NODEV | MNT_LOCK_NODEV;
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}
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if (type->fs_flags & FS_USERNS_VISIBLE) {
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if (!fs_fully_visible(type, &mnt_flags))
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if (!fs_fully_visible(type, &mnt_flags)) {
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put_filesystem(type);
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return -EPERM;
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}
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}
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}
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