[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230117025147.69890-1-yulong.zhang@metoak.net>
Date: Tue, 17 Jan 2023 10:51:47 +0800
From: Yulong Zhang <yulong.zhang@...oak.net>
To: jonathan.cameron@...wei.com
Cc: jic23@...nel.org, lars@...afoo.de, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org, yulong.zhang@...oak.net
Subject: [PATCH v3] tools/iio/iio_utils:fix memory leak
1. fopen sysfs without fclose.
2. asprintf filename without free.
3. if asprintf return error,do not need to free the buffer.
Signed-off-by: Yulong Zhang <yulong.zhang@...oak.net>
---
tools/iio/iio_utils.c | 23 ++++++-----------------
1 file changed, 6 insertions(+), 17 deletions(-)
diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c
index 8d35893b2fa8..6a00a6eecaef 100644
--- a/tools/iio/iio_utils.c
+++ b/tools/iio/iio_utils.c
@@ -264,6 +264,7 @@ int iioutils_get_param_float(float *output, const char *param_name,
if (fscanf(sysfsfp, "%f", output) != 1)
ret = errno ? -errno : -ENODATA;
+ fclose(sysfsfp);
break;
}
error_free_filename:
@@ -345,9 +346,9 @@ int build_channel_array(const char *device_dir, int buffer_idx,
}
sysfsfp = fopen(filename, "r");
+ free(filename);
if (!sysfsfp) {
ret = -errno;
- free(filename);
goto error_close_dir;
}
@@ -357,7 +358,6 @@ int build_channel_array(const char *device_dir, int buffer_idx,
if (fclose(sysfsfp))
perror("build_channel_array(): Failed to close file");
- free(filename);
goto error_close_dir;
}
if (ret == 1)
@@ -365,11 +365,9 @@ int build_channel_array(const char *device_dir, int buffer_idx,
if (fclose(sysfsfp)) {
ret = -errno;
- free(filename);
goto error_close_dir;
}
- free(filename);
}
*ci_array = malloc(sizeof(**ci_array) * (*counter));
@@ -395,9 +393,9 @@ int build_channel_array(const char *device_dir, int buffer_idx,
}
sysfsfp = fopen(filename, "r");
+ free(filename);
if (!sysfsfp) {
ret = -errno;
- free(filename);
count--;
goto error_cleanup_array;
}
@@ -405,20 +403,17 @@ int build_channel_array(const char *device_dir, int buffer_idx,
errno = 0;
if (fscanf(sysfsfp, "%i", ¤t_enabled) != 1) {
ret = errno ? -errno : -ENODATA;
- free(filename);
count--;
goto error_cleanup_array;
}
if (fclose(sysfsfp)) {
ret = -errno;
- free(filename);
count--;
goto error_cleanup_array;
}
if (!current_enabled) {
- free(filename);
count--;
continue;
}
@@ -429,7 +424,6 @@ int build_channel_array(const char *device_dir, int buffer_idx,
strlen(ent->d_name) -
strlen("_en"));
if (!current->name) {
- free(filename);
ret = -ENOMEM;
count--;
goto error_cleanup_array;
@@ -439,7 +433,6 @@ int build_channel_array(const char *device_dir, int buffer_idx,
ret = iioutils_break_up_name(current->name,
¤t->generic_name);
if (ret) {
- free(filename);
free(current->name);
count--;
goto error_cleanup_array;
@@ -450,17 +443,16 @@ int build_channel_array(const char *device_dir, int buffer_idx,
scan_el_dir,
current->name);
if (ret < 0) {
- free(filename);
ret = -ENOMEM;
goto error_cleanup_array;
}
sysfsfp = fopen(filename, "r");
+ free(filename);
if (!sysfsfp) {
ret = -errno;
- fprintf(stderr, "failed to open %s\n",
- filename);
- free(filename);
+ fprintf(stderr, "failed to open %s/%s_index\n",
+ scan_el_dir, current->name);
goto error_cleanup_array;
}
@@ -470,17 +462,14 @@ int build_channel_array(const char *device_dir, int buffer_idx,
if (fclose(sysfsfp))
perror("build_channel_array(): Failed to close file");
- free(filename);
goto error_cleanup_array;
}
if (fclose(sysfsfp)) {
ret = -errno;
- free(filename);
goto error_cleanup_array;
}
- free(filename);
/* Find the scale */
ret = iioutils_get_param_float(¤t->scale,
"scale",
--
2.25.1
Powered by blists - more mailing lists