Chelsy Ratnawat
2025-Nov-25 15:47 UTC
[PATCH] drm/nouveau/mmu: add NULL check for args in nouveau_uvmm_sm_prepare()
nouveau_uvmm_sm_prepare() passes the uvmm_map_args pointer (args) to
op_map_prepare() without checking for NULL.
Prevent NULL deref in op_map_prepare() by checking args before use.
Signed-off-by: Chelsy Ratnawat <chelsyratnawat2001 at gmail.com>
---
drivers/gpu/drm/nouveau/nouveau_uvmm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nouveau_uvmm.c
b/drivers/gpu/drm/nouveau/nouveau_uvmm.c
index 79eefdfd08a2..7a33ce63770c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_uvmm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_uvmm.c
@@ -627,6 +627,10 @@ nouveau_uvmm_sm_prepare(struct nouveau_uvmm *uvmm,
case DRM_GPUVA_OP_MAP: {
u64 vmm_get_range = vmm_get_end - vmm_get_start;
+ if (!args) {
+ ret = -EINVAL;
+ goto unwind;
+ }
ret = op_map_prepare(uvmm, &new->map, &op->map, args);
if (ret)
goto unwind;
--
2.47.3