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Fixed bug 4538 - validate image size when loading BMP files

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This commit is contained in:
Sam Lantinga 2019-07-30 11:00:00 -07:00
parent 738dff4bbc
commit 97fefd0509
1 changed files with 5 additions and 0 deletions
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5
src/video/SDL_bmp.c
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@ -226,6 +226,11 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
SDL_RWseek(src, (biSize - headerSize), RW_SEEK_CUR); SDL_RWseek(src, (biSize - headerSize), RW_SEEK_CUR);
} }
} }
if (biWidth <= 0 || biHeight == 0) {
SDL_SetError("BMP file with bad dimensions (%dx%d)", biWidth, biHeight);
was_error = SDL_TRUE;
goto done;
}
if (biHeight < 0) { if (biHeight < 0) {
topDown = SDL_TRUE; topDown = SDL_TRUE;
biHeight = -biHeight; biHeight = -biHeight;