From: Leo Liu Date: Mon, 28 Apr 2014 13:40:22 +0000 (-0400) Subject: drm/radeon: check buffer relocation offset X-Git-Tag: v3.15-rc5~10^2~2^2~6 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=695daf1a8e731a4b5b89de89a61f32a4d7ad7094;p=karo-tx-linux.git drm/radeon: check buffer relocation offset Signed-off-by: Leo Liu Signed-off-by: Christian König Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c index 5748bdaeacce..0f96c471c6d8 100644 --- a/drivers/gpu/drm/radeon/radeon_uvd.c +++ b/drivers/gpu/drm/radeon/radeon_uvd.c @@ -465,6 +465,10 @@ static int radeon_uvd_cs_reloc(struct radeon_cs_parser *p, cmd = radeon_get_ib_value(p, p->idx) >> 1; if (cmd < 0x4) { + if (end <= start) { + DRM_ERROR("invalid reloc offset %X!\n", offset); + return -EINVAL; + } if ((end - start) < buf_sizes[cmd]) { DRM_ERROR("buffer (%d) to small (%d / %d)!\n", cmd, (unsigned)(end - start), buf_sizes[cmd]);