Re: [PATCH v4l-utils] libmediactl: bug fix in memory allocation for links enumeration

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Hi,
This patch is wrong, please ignore it,
Dafna

On 11/18/19 1:55 PM, Dafna Hirschfeld wrote:
In the function media_enum_links, the links and pads pointers
should be allocated according to number of pads and links of
the entity. Currently they are allocated to only one element.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
---
  utils/media-ctl/libmediactl.c | 12 ++++++++----
  1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/utils/media-ctl/libmediactl.c b/utils/media-ctl/libmediactl.c
index 1fd6525b..d9a30b01 100644
--- a/utils/media-ctl/libmediactl.c
+++ b/utils/media-ctl/libmediactl.c
@@ -325,11 +325,15 @@ static int media_enum_links(struct media_device *media)
  	for (id = 1; id <= media->entities_count; id++) {
  		struct media_entity *entity = &media->entities[id - 1];
  		struct media_links_enum links = { 0 };
+		unsigned int pads_num = entity->info.pads;
+		unsigned int links_num = entity->info.links;
  		unsigned int i;
links.entity = entity->info.id;
-		links.pads = calloc(entity->info.pads, sizeof(struct media_pad_desc));
-		links.links = calloc(entity->info.links, sizeof(struct media_link_desc));
+		links.pads = calloc(entity->info.pads,
+				    pads_num * sizeof(struct media_pad_desc));
+		links.links = calloc(entity->info.links,
+				     links_num * sizeof(struct media_link_desc));
if (ioctl(media->fd, MEDIA_IOC_ENUM_LINKS, &links) < 0) {
  			ret = -errno;
@@ -341,13 +345,13 @@ static int media_enum_links(struct media_device *media)
  			return ret;
  		}
- for (i = 0; i < entity->info.pads; ++i) {
+		for (i = 0; i < pads_num; ++i) {
  			entity->pads[i].entity = entity;
  			entity->pads[i].index = links.pads[i].index;
  			entity->pads[i].flags = links.pads[i].flags;
  		}
- for (i = 0; i < entity->info.links; ++i) {
+		for (i = 0; i < links_num; ++i) {
  			struct media_link_desc *link = &links.links[i];
  			struct media_link *fwdlink;
  			struct media_link *backlink;




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