Fix the potential leak of chunk iterator used for ICC Profile colorSpace check

Author: dreampiggy

SDWebImageWebPCoder/Classes/SDImageWebPCoder.m

@@ -422,13 +422,17 @@ - (nonnull CGColorSpaceRef)sd_colorSpaceWithDemuxer:(nonnull WebPDemuxer *)demux
  // WebP contains ICC Profile should use the desired colorspace, instead of default device colorspace
  // See: https://developers.google.com/speed/webp/docs/riff_container#color_profile
 
- WebPChunkIterator chunk_iter;
  CGColorSpaceRef colorSpaceRef = NULL;
+ uint32_t flags = WebPDemuxGetI(demuxer, WEBP_FF_FORMAT_FLAGS);
 
- int result = WebPDemuxGetChunk(demuxer, "ICCP", 1, &chunk_iter);
- if (result) {
- NSData *profileData = [NSData dataWithBytes:chunk_iter.chunk.bytes length:chunk_iter.chunk.size];
- colorSpaceRef = CGColorSpaceCreateWithICCProfile((__bridge CFDataRef)profileData);
+ if (flags & ICCP_FLAG) {
+ WebPChunkIterator chunk_iter;
+ int result = WebPDemuxGetChunk(demuxer, "ICCP", 1, &chunk_iter);
+ if (result) {
+ NSData *profileData = [NSData dataWithBytesNoCopy:(void *)chunk_iter.chunk.bytes length:chunk_iter.chunk.size freeWhenDone:NO];
+ colorSpaceRef = CGColorSpaceCreateWithICCProfile((__bridge CFDataRef)profileData);
+ WebPDemuxReleaseChunkIterator(&chunk_iter);
+ }
  }
 
  if (!colorSpaceRef) {