fuse: readdir: check for slash in names
Userspace can add names containing a slash character to the directory listing. Don't allow this as it could cause all sorts of trouble. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: stable@vger.kernel.org
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@ -1174,6 +1174,8 @@ static int parse_dirfile(char *buf, size_t nbytes, struct file *file,
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return -EIO;
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if (reclen > nbytes)
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break;
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if (memchr(dirent->name, '/', dirent->namelen) != NULL)
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return -EIO;
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if (!dir_emit(ctx, dirent->name, dirent->namelen,
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dirent->ino, dirent->type))
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@ -1320,6 +1322,8 @@ static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
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return -EIO;
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if (reclen > nbytes)
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break;
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if (memchr(dirent->name, '/', dirent->namelen) != NULL)
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return -EIO;
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if (!over) {
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/* We fill entries into dstbuf only as much as
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