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authorRoel Kluin <roel.kluin@gmail.com>2009-08-03 14:20:32 +0200
committerDave Airlie <airlied@redhat.com>2009-08-04 13:41:05 +1000
commitfa99239cb73dbf419bea9f334b85ba94ac88a532 (patch)
treeea955f6d162a45ba098d9cc247f92e9a7ddada10 /drivers/gpu/drm/radeon/r100.c
parentfee280d3fd9bc5247bef9f4ab35a4693bfffdcfd (diff)
drm/radeon: Read buffer overflow
Check whether index is within bounds before grabbing the element. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/r100.c')
-rw-r--r--drivers/gpu/drm/radeon/r100.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 05a44896dff..f1ba8ff4113 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -722,13 +722,14 @@ int r100_cs_packet_parse(struct radeon_cs_parser *p,
unsigned idx)
{
struct radeon_cs_chunk *ib_chunk = &p->chunks[p->chunk_ib_idx];
- uint32_t header = ib_chunk->kdata[idx];
+ uint32_t header;
if (idx >= ib_chunk->length_dw) {
DRM_ERROR("Can not parse packet at %d after CS end %d !\n",
idx, ib_chunk->length_dw);
return -EINVAL;
}
+ header = ib_chunk->kdata[idx];
pkt->idx = idx;
pkt->type = CP_PACKET_GET_TYPE(header);
pkt->count = CP_PACKET_GET_COUNT(header);