On 2026-06-17 14:45, Eric Huang wrote:
to prevent svm range to be overflow.
Signed-off-by: Eric Huang<[email protected]>
---
drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index ffecd818e611..ad4325d25e7c 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -3473,7 +3473,9 @@ svm_range_is_valid(struct kfd_process *p, uint64_t start,
uint64_t size)
unsigned long start_unchg = start;
start <<= PAGE_SHIFT;
- end = start + (size << PAGE_SHIFT);
+ if (check_add_overflow(start, size << PAGE_SHIFT, &end))
This looks good to me, as you are here, add another check for size==0
case, since this will have underflow
last = start + size - 1;
Regards,
Philip
+ return -EOVERFLOW;
+
do {
vma = vma_lookup(p->mm, start);
if (!vma || (vma->vm_flags & device_vma))
