[Mesa-dev] [PATCH v3 2/4] intel/decoder: Avoid freeing invalid pointer
Sagar Ghuge
sagar.ghuge at intel.com
Thu Sep 13 19:15:00 UTC 2018
Ping.
On 9/6/18 12:37 PM, Sagar Ghuge wrote:
> v2: Free ctx.spec if error while reading genxml (Lionel Landwerlin)
>
> v3: Handle case where genxml is empty (Lionel Landwerlin)
>
> Signed-off-by: Sagar Ghuge <sagar.ghuge at intel.com>
> ---
> src/intel/common/gen_decoder.c | 18 +++++++++++++-----
> 1 file changed, 13 insertions(+), 5 deletions(-)
>
> diff --git a/src/intel/common/gen_decoder.c b/src/intel/common/gen_decoder.c
> index d4db8b89cc..38a5fccb2a 100644
> --- a/src/intel/common/gen_decoder.c
> +++ b/src/intel/common/gen_decoder.c
> @@ -654,25 +654,27 @@ gen_spec_load_from_path(const struct gen_device_info *devinfo,
> ctx.spec = gen_spec_init();
> if (ctx.spec == NULL) {
> fprintf(stderr, "Failed to create gen_spec\n");
> - return NULL;
> + goto end;
> }
>
> do {
> buf = XML_GetBuffer(ctx.parser, XML_BUFFER_SIZE);
> len = fread(buf, 1, XML_BUFFER_SIZE, input);
> - if (len == 0) {
> + if (ferror(input)) {
> fprintf(stderr, "fread: %m\n");
> - free(ctx.spec);
> + gen_spec_destroy(ctx.spec);
> ctx.spec = NULL;
> goto end;
> - }
> + } else if (feof(input))
> + goto end;
> +
> if (XML_ParseBuffer(ctx.parser, len, len == 0) == 0) {
> fprintf(stderr,
> "Error parsing XML at line %ld col %ld: %s\n",
> XML_GetCurrentLineNumber(ctx.parser),
> XML_GetCurrentColumnNumber(ctx.parser),
> XML_ErrorString(XML_GetErrorCode(ctx.parser)));
> - free(ctx.spec);
> + gen_spec_destroy(ctx.spec);
> ctx.spec = NULL;
> goto end;
> }
> @@ -684,6 +686,12 @@ gen_spec_load_from_path(const struct gen_device_info *devinfo,
> fclose(input);
> free(filename);
>
> + /* free ctx.spec if genxml is empty */
> + if (ctx.spec && _mesa_hash_table_num_entries(ctx.spec->commands) == 0) {
> + gen_spec_destroy(ctx.spec);
> + return NULL;
> + }
> +
> return ctx.spec;
> }
>
>
More information about the mesa-dev
mailing list