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drm/etnaviv: potential NULL dereference

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[ Upstream commit 9e05352340 ]

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: 5f4a4a73f4 ("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>
This commit is contained in:
Dan Carpenter 2019-02-05 12:08:19 +03:00 committed by Greg Kroah-Hartman
parent 9aea648830
commit a4bf79da35
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
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@ -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);
}