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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 20:07:01 +0300
Message-ID: <20220507170703.29902-3-i.kamaletdinov@omp.ru>
In-Reply-To: <20220507170703.29902-1-i.kamaletdinov@omp.ru>
References: <20220507170703.29902-1-i.kamaletdinov@omp.ru>
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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 | 6 +++++-
 tools/btgatt-server.c | 5 ++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/btgatt-client.c b/tools/btgatt-client.c
index 8c9365aa2..58a03bd48 100644
--- a/tools/btgatt-client.c
+++ b/tools/btgatt-client.c
@@ -1355,12 +1355,16 @@ static void prompt_read_cb(int fd, uint32_t events, void *user_data)
 		return;
 	}
 
-	if ((read = getline(&line, &len, stdin)) == -1)
+	read = getline(&line, &len, stdin);
+	if (read < 0) {
+		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