From: Francis Deslauriers <francis.deslauriers@efficios.com>
Date: Wed, 8 Mar 2017 19:32:31 +0000 (-0500)
Subject: Fix: use of uninitialized ret value in lttng_abi_open_metadata_stream
X-Git-Tag: v2.9.2~2
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=715b31b70672fdf2606d7fc7d5d59a4c005d0c6b;p=lttng-modules.git

Fix: use of uninitialized ret value in lttng_abi_open_metadata_stream

Fixes the following compiler warning:

lttng-abi.c: In function ‘lttng_metadata_ioctl’:
lttng-abi.c:971:6: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  int ret;
      ^

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/lttng-abi.c b/lttng-abi.c
index e193f437..478a5912 100644
--- a/lttng-abi.c
+++ b/lttng-abi.c
@@ -998,8 +998,11 @@ int lttng_abi_open_metadata_stream(struct file *channel_file)
 		goto notransport;
 	}
 
-	if (!lttng_kref_get(&session->metadata_cache->refcount))
+	if (!lttng_kref_get(&session->metadata_cache->refcount)) {
+		ret = -EOVERFLOW;
 		goto kref_error;
+	}
+
 	ret = lttng_abi_create_stream_fd(channel_file, stream_priv,
 			&lttng_metadata_ring_buffer_file_operations);
 	if (ret < 0)