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-rw-r--r--mm/huge_memory.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index d5b2b75..e7d5db9 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1227,8 +1227,11 @@ int do_huge_pmd_numa_page(struct fault_env *fe, pmd_t pmd)
*/
if (unlikely(pmd_trans_migrating(*fe->pmd))) {
page = pmd_page(*fe->pmd);
+ if (!get_page_unless_zero(page))
+ goto out_unlock;
spin_unlock(fe->ptl);
wait_on_page_locked(page);
+ put_page(page);
goto out;
}
@@ -1260,8 +1263,11 @@ int do_huge_pmd_numa_page(struct fault_env *fe, pmd_t pmd)
/* Migration could have started since the pmd_trans_migrating check */
if (!page_locked) {
+ if (!get_page_unless_zero(page))
+ goto out_unlock;
spin_unlock(fe->ptl);
wait_on_page_locked(page);
+ put_page(page);
page_nid = -1;
goto out;
}