Received-SPF: softfail (google.com: domain of transitioning linux-bluetooth-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
From:   Ildar Kamaletdinov <i.kamaletdinov@omp.ru>
To:     <linux-bluetooth@vger.kernel.org>
CC:     Ildar Kamaletdinov <i.kamaletdinov@omp.ru>
Subject: [PATCH BlueZ 2/4] tools: Fix memory leaks in btgatt-server/client
Date:   Sat, 7 May 2022 18:06:55 +0300
Message-ID: <20220507150657.28240-3-i.kamaletdinov@omp.ru>
In-Reply-To: <20220507150657.28240-1-i.kamaletdinov@omp.ru>
References: <20220507150657.28240-1-i.kamaletdinov@omp.ru>
MIME-Version: 1.0
Content-Transfer-Encoding: 7BIT
Content-Type:   text/plain; charset=US-ASCII
Precedence: bulk

According to man buffer allocated by getline() should be freed by
the user program even if getline() failed.

Found by Linux Verification Center (linuxtesting.org) with the SVACE
static analysis tool.
---
 tools/btgatt-client.c | 5 ++++-
 tools/btgatt-server.c | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/btgatt-client.c b/tools/btgatt-client.c
index 8c9365aa2..9447062fb 100644
--- a/tools/btgatt-client.c
+++ b/tools/btgatt-client.c
@@ -1355,12 +1355,15 @@ static void prompt_read_cb(int fd, uint32_t events, void *user_data)
 		return;
 	}
 
-	if ((read = getline(&line, &len, stdin)) == -1)
+	if ((read = getline(&line, &len, stdin)) == -1) {
+		free(line);
 		return;
+	}
 
 	if (read <= 1) {
 		cmd_help(cli, NULL);
 		print_prompt();
+		free(line);
 		return;
 	}
 
diff --git a/tools/btgatt-server.c b/tools/btgatt-server.c
index 4a5d2b720..90a6c9b0a 100644
--- a/tools/btgatt-server.c
+++ b/tools/btgatt-server.c
@@ -1080,12 +1080,15 @@ static void prompt_read_cb(int fd, uint32_t events, void *user_data)
 	}
 
 	read = getline(&line, &len, stdin);
-	if (read < 0)
+	if (read < 0) {
+		free(line);
 		return;
+	}
 
 	if (read <= 1) {
 		cmd_help(server, NULL);
 		print_prompt();
+		free(line);
 		return;
 	}
 
-- 
2.35.3