tools: iio: Set caller's ci_array pointer to NULL after free

On error, caller's ci_array is freed and set to NULL to avoid
potential double free if some other user of this code is not
sufficiently careful. Counter is reset to zero for consistency.

Signed-off-by: Joo Aun Saw <jasaw@dius.com.au>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c
index 4bbd6e7959cd..8475b832ee39 100644
--- a/tools/iio/iio_utils.c
+++ b/tools/iio/iio_utils.c
@@ -526,6 +526,8 @@ error_cleanup_array:
                 free((*ci_array)[i].generic_name);
         }
         free(*ci_array);
+        *ci_array = NULL;
+        *counter = 0;
 error_close_dir:
         if (dp)
                 if (closedir(dp) == -1)