diff options
| -rw-r--r-- | mm/memory-failure.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index a013bc94ebbe..44c6bd201d3a 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1173,6 +1173,16 @@ int memory_failure(unsigned long pfn, int trapno, int flags) lock_page(hpage); /* + * The page could have changed compound pages during the locking. + * If this happens just bail out. + */ + if (compound_head(p) != hpage) { + action_result(pfn, "different compound page after locking", IGNORED); + res = -EBUSY; + goto out; + } + + /* * We use page flags to determine what action should be taken, but * the flags can be modified by the error containment action. One * example is an mlocked page, where PG_mlocked is cleared by |