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[legacy] Return allocated "old_buffer" in png_push_save_buffer()

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before png_error(), to avoid a memory leak.
This commit is contained in:
Glenn Randers-Pehrson
2010-02-08 07:30:16 -06:00
parent d08f1469cb
commit cac0408b59
3 changed files with 9 additions and 2 deletions
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7
pngpread.c
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@@ -702,8 +702,13 @@ png_push_save_buffer(png_structp png_ptr)
new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
old_buffer = png_ptr->save_buffer;
png_ptr->save_buffer = (png_bytep)png_malloc(png_ptr,
png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr,
(png_uint_32)new_max);
if (png_ptr->save_buffer == NULL)
{
png_free(png_ptr, old_buffer);
png_error(png_ptr, "Insufficient memory for save_buffer");
}
png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
png_free(png_ptr, old_buffer);
png_ptr->save_buffer_max = new_max;