On Wed, 20 Nov 2024 15:27:46 -0500 "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx> wrote:
> I hate the extra check because syzbot can cause this as this should
> basically never happen in real life, but it seems we have to add it.
So..
--- a/mm/mempolicy.c~mm-mempolicy-fix-migrate_to_node-assuming-there-is-at-least-one-vma-in-a-mm-fix
+++ a/mm/mempolicy.c
@@ -1080,7 +1080,7 @@ static long migrate_to_node(struct mm_st
mmap_read_lock(mm);
vma = find_vma(mm, 0);
- if (!vma) {
+ if (unlikely(!vma)) {
mmap_read_unlock(mm);
return 0;
}
_
?
