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Commit 4779cb31 authored by Andi Kleen's avatar Andi Kleen
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HWPOISON: Fix page count leak in hwpoison late kill in do_swap_page 



When returning due to a poisoned page drop the page count.

It wasn't a fatal problem because noone cares about the page count
on a poisoned page (except when it wraps), but it's cleaner to fix it.

Pointed out by Linus.

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
parent e43c3afb

mm/memory.c

+2 −1
Original line number Diff line number Diff line
@@ -2539,7 +2539,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, 
	} else if (PageHWPoison(page)) {

		ret = VM_FAULT_HWPOISON;

		delayacct_clear_flag(DELAYACCT_PF_SWAPIN);

		goto out;

		goto out_release;

	}



	lock_page(page);
@@ -2611,6 +2611,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, 
	pte_unmap_unlock(page_table, ptl);

out_page:

	unlock_page(page);

out_release:

	page_cache_release(page);

	return ret;

}