From patchwork Tue Aug 20 18:26:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Moyer X-Patchwork-Id: 13770527 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AAFBD1B86F1 for ; Tue, 20 Aug 2024 18:27:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724178436; cv=none; b=NVx+T41MdYHScKjQv35Oy1ijD0wsSyJLQfaYdgG0qorVAKbB8fIl7zFPyL5twT+4UMVw2hJzd2RbFSLfRIie89mWsokSZs7ZjuVnSFbcpcDIAxOpAMrf1pR1AJSibHw70B11EHoKomib4z/QLFUshWFZIxG9unuE3Tx/ZsNcW88= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724178436; c=relaxed/simple; bh=X7gnnKeMXGNArynnYsg7QWUU1vE5aGlRUDOmiCeKWjY=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=igN97MDO4r927O7gRB//RGH4W02mtVXZVkv7nj8pkgXqvjIFz5h1WLIoBc2iTsA2GxRs1UDIg0RzY4JolqlWiMQLUfpezaTCAhuEnivovRjZXUWAgB+SoJtfdVfdyrYrsVczP5fAwyWAsHgp9SLD7z4YoQ/aYGRqGHwvt2uUN7A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=CSMhv2hB; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="CSMhv2hB" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724178433; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RDYdzBsedMT1L1pG5g9sJB2OVOSY8UR/9G3iq9yt/kk=; b=CSMhv2hB8tbWuAf2e7dTu1377UqQNycXYnEyLUfR9aUaD/NrQixOq/SG3uOj8hESJnx2Uh ejyoeL1C1IbWPodUAoKaTUZQ9/49mpTyYwtPmzHSF9hVvpHyYviaekKZMe/8tbwuMDnMwi bLjxNr2T3xiW97CQC5yP39AhV4OpWfI= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-111-KA-xPZ9nPpevu5y4J1nwMA-1; Tue, 20 Aug 2024 14:27:12 -0400 X-MC-Unique: KA-xPZ9nPpevu5y4J1nwMA-1 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E12D71955D4E for ; Tue, 20 Aug 2024 18:27:10 +0000 (UTC) Received: from segfault.usersys.redhat.com (unknown [10.22.32.128]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7BEDD1955F21 for ; Tue, 20 Aug 2024 18:27:10 +0000 (UTC) Received: by segfault.usersys.redhat.com (Postfix, from userid 3734) id 350D622ACC09; Tue, 20 Aug 2024 14:27:08 -0400 (EDT) From: jmoyer@redhat.com To: nvdimm@lists.linux.dev Subject: [PATCH ndctl 1/2] ndctl/keys.c: don't leak fd in error cases Date: Tue, 20 Aug 2024 14:26:40 -0400 Message-ID: <20240820182705.139842-2-jmoyer@redhat.com> In-Reply-To: <20240820182705.139842-1-jmoyer@redhat.com> References: <20240820182705.139842-1-jmoyer@redhat.com> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com From: Jeff Moyer Static analysis points out that fd is leaked in some cases. The change to the while loop is optional. I only did that to make the code consistent. Signed-off-by: Jeff Moyer Reviewed-by: Dave Jiang Reviewed-by: Vishal Verma --- ndctl/keys.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/ndctl/keys.c b/ndctl/keys.c index 2c1f474..cc55204 100644 --- a/ndctl/keys.c +++ b/ndctl/keys.c @@ -108,7 +108,7 @@ char *ndctl_load_key_blob(const char *path, int *size, const char *postfix, struct stat st; ssize_t read_bytes = 0; int rc, fd; - char *blob, *pl, *rdptr; + char *blob = NULL, *pl, *rdptr; char prefix[] = "load "; bool need_prefix = false; @@ -125,16 +125,16 @@ char *ndctl_load_key_blob(const char *path, int *size, const char *postfix, rc = fstat(fd, &st); if (rc < 0) { fprintf(stderr, "stat: %s\n", strerror(errno)); - return NULL; + goto out_close; } if ((st.st_mode & S_IFMT) != S_IFREG) { fprintf(stderr, "%s not a regular file\n", path); - return NULL; + goto out_close; } if (st.st_size == 0 || st.st_size > 4096) { fprintf(stderr, "Invalid blob file size\n"); - return NULL; + goto out_close; } *size = st.st_size; @@ -166,15 +166,13 @@ char *ndctl_load_key_blob(const char *path, int *size, const char *postfix, fprintf(stderr, "Failed to read from blob file: %s\n", strerror(errno)); free(blob); - close(fd); - return NULL; + blob = NULL; + goto out_close; } read_bytes += rc; rdptr += rc; } while (read_bytes != st.st_size); - close(fd); - if (postfix) { pl += read_bytes; *pl = ' '; @@ -182,6 +180,8 @@ char *ndctl_load_key_blob(const char *path, int *size, const char *postfix, rc = sprintf(pl, "keyhandle=%s", postfix); } +out_close: + close(fd); return blob; }