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-rw-r--r--mm/mprotect.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 063bbed22c7b..ec91dfd3f900 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -304,6 +304,7 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev,
vma->vm_userfaultfd_ctx);
if (*pprev) {
vma = *pprev;
+ VM_WARN_ON((vma->vm_flags ^ newflags) & ~VM_SOFTDIRTY);
goto success;
}