From 18cb317078ba64706cda094a7b72da5faa7968e6 Mon Sep 17 00:00:00 2001 From: Leo Liu Date: Mon, 28 Apr 2014 09:40:22 -0400 Subject: [PATCH] drm/radeon: check buffer relocation offset MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit commit 695daf1a8e731a4b5b89de89a61f32a4d7ad7094 upstream. Signed-off-by: Leo Liu Signed-off-by: Christian König Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/radeon_uvd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c index 21d2d5280fc..5715429279f 100644 --- a/drivers/gpu/drm/radeon/radeon_uvd.c +++ b/drivers/gpu/drm/radeon/radeon_uvd.c @@ -449,6 +449,10 @@ 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 to small (%d / %d)!\n", (unsigned)(end - start), buf_sizes[cmd]); -- 2.11.0