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Bug 2299

Summary: Memory leak in SDL_CreateYUV_SW
Product: SDL Reporter: Nitz <nitin.j4>
Component: videoAssignee: Sam Lantinga <slouken>
Status: RESOLVED INVALID QA Contact: Sam Lantinga <slouken>
Severity: critical    
Priority: P2 CC: arvin.mittal, philipp.wiesemann
Version: 1.2.15   
Hardware: x86   
OS: Linux   
Attachments: Patch

Description Nitz 2013-12-12 05:48:15 UTC 
In SDL_Overlay *SDL_CreateYUV_SW(_THIS, int width, int height, Uint32 format, SDL_Surface *display)

function, 3 pointers are getting leak:
1. swdata->pixels
2. swdata->colortab
3. swdata->rgb_2_pix
 
at this point:
if ( ! swdata->pixels || ! swdata->colortab || ! swdata->rgb_2_pix ) {
                SDL_OutOfMemory();
                SDL_FreeYUVOverlay(overlay);
                return(NULL);
        }
Patch:

swdata->pixels = (Uint8 *) SDL_malloc(width*height*2);
if(! swdata->pixels)
{
  SDL_OutOfMemory();
  SDL_FreeYUVOverlay(overlay);
  return(NULL);
}
swdata->colortab = (int *)SDL_malloc(4*256*sizeof(int));
if(! swdata->colortab )
{
  SDL_free(swdata->pixels);
  SDL_OutOfMemory();
  SDL_FreeYUVOverlay(overlay);
  return(NULL);
}
swdata->rgb_2_pix = (Uint32 *)SDL_malloc(3*768*sizeof(Uint32));
if(! swdata->rgb_2_pix)
{
  SDL_free(swdata->pixels);
  SDL_free(swdata->colortab);
  SDL_OutOfMemory();
  SDL_FreeYUVOverlay(overlay);
  return(NULL);
}

        Cr_r_tab = &swdata->colortab[0*256];
        Cr_g_tab = &swdata->colortab[1*256];
        Cb_g_tab = &swdata->colortab[2*256];
        Cb_b_tab = &swdata->colortab[3*256];
        
        r_2_pix_alloc = &swdata->rgb_2_pix[0*768];
        g_2_pix_alloc = &swdata->rgb_2_pix[1*768];
        b_2_pix_alloc = &swdata->rgb_2_pix[2*768];
        

Thanks
Comment 1 Philipp Wiesemann 2014-10-29 20:09:53 UTC 
Seems a duplicate of bug 2334 but the patch is different there.
Comment 2 Nitz 2014-10-30 03:35:19 UTC 
Created attachment 1920 [details]
Patch

This patch is tested and having no issue.
Comment 3 Nitz 2014-10-30 03:37:13 UTC 
Yes Mr.Philipp that seems to be an duplicate issue reported by someone else.
I attached the final path which has been tested having no issue.
So it is safe to apply.

Thanks!!!
Comment 4 Philipp Wiesemann 2014-11-01 12:27:41 UTC 
From looking at the source of SDL_yuv_sw.c it seems to me that all three pointers would also be deleted with SDL_FreeYUVOverlay() because it indirectly calls SDL_FreeYUV_SW(). If this is the case there would be no leak.
Comment 5 Philipp Wiesemann 2014-11-01 12:44:20 UTC 
*** Bug 2334 has been marked as a duplicate of this bug. ***
Comment 6 Nitz 2014-11-03 03:18:00 UTC 
Ohh yee you are right....
thanks for your inputs :)
Comment 7 Philipp Wiesemann 2014-12-03 20:28:02 UTC 
Resolved as invalid because there seems to be no leak. See previous discussion.