From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 3 Jul 2018 12:30:56 +0000 (+0300)
Subject: drm/nouveau/gem: off by one bugs in nouveau_gem_pushbuf_reloc_apply()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dcedabcab0457f17df9c7ff7d66cd27aa517b685;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

drm/nouveau/gem: off by one bugs in nouveau_gem_pushbuf_reloc_apply()

[ Upstream commit 7f073d011f93e92d4d225526b9ab6b8b0bbd6613 ]

The bo array has req->nr_buffers elements so the > should be >= so we
don't read beyond the end of the array.

Fixes: a1606a9596e5 ("drm/nouveau: new gem pushbuf interface, bump to 0.0.16")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
index 2170534101ca..60ffb70bb908 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -599,7 +599,7 @@ nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
 		struct nouveau_bo *nvbo;
 		uint32_t data;
 
-		if (unlikely(r->bo_index > req->nr_buffers)) {
+		if (unlikely(r->bo_index >= req->nr_buffers)) {
 			NV_PRINTK(err, cli, "reloc bo index invalid\n");
 			ret = -EINVAL;
 			break;
@@ -609,7 +609,7 @@ nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
 		if (b->presumed.valid)
 			continue;
 
-		if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
+		if (unlikely(r->reloc_bo_index >= req->nr_buffers)) {
 			NV_PRINTK(err, cli, "reloc container bo index invalid\n");
 			ret = -EINVAL;
 			break;