Possible memory leak

[VoroninArtemii]

There is a possible memory leak:

Pillow/src/libImaging/SgiRleDecode.c

Lines 191 to 200 in 8d0a6d0

	ptr = malloc(sizeof(UINT8) * c->bufsize);
	if (!ptr) {
	state->errcode = IMAGING_CODEC_MEMORY;
	return -1;
	}
	_imaging_seek_pyFd(state->fd, SGI_HEADER_SIZE, SEEK_SET);
	if (_imaging_read_pyFd(state->fd, (char *)ptr, c->bufsize) != c->bufsize) {
	state->errcode = IMAGING_CODEC_UNKNOWN;
	return -1;
	}

We allocated memory for ptr but didn't free it before return -1; on line 199.

Found by Linux Verification Center (portal.linuxtesting.ru) with SVACE.
Author A. Voronin.

[radarhere]

I've created #8413 to resolve this.