+ lib-fix-test_hmmc-reference-after-free.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: lib: fix test_hmm.c reference after free
has been added to the -mm tree.  Its filename is
     lib-fix-test_hmmc-reference-after-free.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/lib-fix-test_hmmc-reference-after-free.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/lib-fix-test_hmmc-reference-after-free.patch

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------------------------------------------------------
From: Randy Dunlap <rdunlap@infradead.org>
Subject: lib: fix test_hmm.c reference after free

Coccinelle scripts report the following errors:

lib/test_hmm.c:523:20-26: ERROR: reference preceded by free on line 521
lib/test_hmm.c:524:21-27: ERROR: reference preceded by free on line 521
lib/test_hmm.c:523:28-35: ERROR: devmem is NULL but dereferenced.
lib/test_hmm.c:524:29-36: ERROR: devmem is NULL but dereferenced.

Fix these by using the local variable 'res' instead of devmem.

Link: http://lkml.kernel.org/r/c845c158-9c65-9665-0d0b-00342846dd07@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/test_hmm.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/lib/test_hmm.c~lib-fix-test_hmmc-reference-after-free
+++ a/lib/test_hmm.c
@@ -520,8 +520,7 @@ static bool dmirror_allocate_chunk(struc
 err_free:
 	kfree(devmem);
 err_release:
-	release_mem_region(devmem->pagemap.res.start,
-			   resource_size(&devmem->pagemap.res));
+	release_mem_region(res->start, resource_size(res));
 err:
 	mutex_unlock(&mdevice->devmem_lock);
 	return false;
_

Patches currently in -mm which might be from rdunlap@infradead.org are

lib-fix-test_hmmc-reference-after-free.patch