From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit 9e05352340d3a3e68c144136db9810b26ebb88c3 ]
The etnaviv_gem_prime_get_sg_table() is supposed to return error pointers. Otherwise it can lead to a NULL dereference when it's called from drm_gem_map_dma_buf().
Fixes: 5f4a4a73f437 ("drm/etnaviv: fix gem_prime_get_sg_table to return new SG table") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Reviewed-by: Christian Gmeiner christian.gmeiner@gmail.com Signed-off-by: Lucas Stach l.stach@pengutronix.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c index 0566171f8df22..f21529e635e3d 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c @@ -15,7 +15,7 @@ struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj) int npages = obj->size >> PAGE_SHIFT;
if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */ - return NULL; + return ERR_PTR(-EINVAL);
return drm_prime_pages_to_sg(etnaviv_obj->pages, npages); }