[PATCH AUTOSEL 4.19 09/16] tools/iio/iio_utils:fix memory leak

From: Yulong Zhang yulong.zhang@metoak.net

[ Upstream commit f2edf0c819a4823cd6c288801ce737e8d4fcde06 ]

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@metoak.net Link: https://lore.kernel.org/r/20230117025147.69890-1-yulong.zhang@metoak.net Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 d60a252577f0b..d174487b2f226 100644 --- a/tools/iio/iio_utils.c +++ b/tools/iio/iio_utils.c @@ -265,6 +265,7 @@ 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, }

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, 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,

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, }

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, errno = 0; if (fscanf(sysfsfp, "%i", &current_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, 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, ret = iioutils_break_up_name(current->name, &current->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, 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, 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(&current->scale, "scale",