msm_gem_describe() would attempt to dereference a NULL pointer via the
address space pointer when no IOMMU is present. Correct this by adding
the appropriate check.
Signed-off-by: Brian Masney <masneyb@xxxxxxxxxxxxx>
Fixes: 575f0485508b ("drm/msm: Clean up and enhance the output of the 'gem' debugfs node")
---
drivers/gpu/drm/msm/msm_gem.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 31d5a744d84f..35f55dd25994 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -803,7 +803,8 @@ void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
seq_puts(m, " vmas:");
list_for_each_entry(vma, &msm_obj->vmas, list)
- seq_printf(m, " [%s: %08llx,%s,inuse=%d]", vma->aspace->name,
+ seq_printf(m, " [%s: %08llx,%s,inuse=%d]",
+ vma->aspace != NULL ? vma->aspace->name : NULL,
vma->iova, vma->mapped ? "mapped" : "unmapped",
vma->inuse);
--
2.20.1
