There is a signedness bug in shmem_pin_map() error handling because "i"
is unsigned. The "while (--i >= 0)" will loop forever until the system
crashes.
Fixes: bfed6708d6c9 ("drm/i915: use vmap in shmem_pin_map")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/shmem_utils.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/shmem_utils.c b/drivers/gpu/drm/i915/gt/shmem_utils.c
index f011ea42487e..7eb542018219 100644
--- a/drivers/gpu/drm/i915/gt/shmem_utils.c
+++ b/drivers/gpu/drm/i915/gt/shmem_utils.c
@@ -52,8 +52,9 @@ struct file *shmem_create_from_object(struct drm_i915_gem_object *obj)
void *shmem_pin_map(struct file *file)
{
struct page **pages;
- size_t n_pages, i;
+ size_t n_pages;
void *vaddr;
+ int i;
n_pages = file->f_mapping->host->i_size >> PAGE_SHIFT;
pages = kvmalloc_array(n_pages, sizeof(*pages), GFP_KERNEL);
--
2.28.0
