The buffer->pages[] has "buffer->pagecount" elements so this > comparison
has to be changed to >= to avoid reading beyond the end of the array.
The buffer->pages[] array is allocated in cma_heap_allocate().
Fixes: a5d2d29e24be ("dma-buf: heaps: Move heap-helper logic into the cma_heap implementation")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
drivers/dma-buf/heaps/cma_heap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c
index ee899f8e6721..bea7e574f916 100644
--- a/drivers/dma-buf/heaps/cma_heap.c
+++ b/drivers/dma-buf/heaps/cma_heap.c
@@ -165,7 +165,7 @@ static vm_fault_t cma_heap_vm_fault(struct vm_fault *vmf)
struct vm_area_struct *vma = vmf->vma;
struct cma_heap_buffer *buffer = vma->vm_private_data;
- if (vmf->pgoff > buffer->pagecount)
+ if (vmf->pgoff >= buffer->pagecount)
return VM_FAULT_SIGBUS;
vmf->page = buffer->pages[vmf->pgoff];
--
2.39.2
