[PATCH] Ceph: Fix use-after-free in destroy_fs_client()

[Jesper Juhl]

Hi,

In fs/ceph/super.c::destroy_fs_client() the pointer 'fsc' is freed by 
kfree() and subsequently used in a call to dout() - use after free bug.
Easily fixed by simply moving the kfree() call after the dout() call.

Signed-off-by: Jesper Juhl <jj@xxxxxxxxxxxxx>
---
 super.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 08b460a..7373594 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -498,8 +498,8 @@ void destroy_fs_client(struct ceph_fs_client *fsc)
 
 	ceph_destroy_client(fsc->client);
 
-	kfree(fsc);
 	dout("destroy_fs_client %p done\n", fsc);
+	kfree(fsc);
 }
 
 /*


-- 
Jesper Juhl <jj@xxxxxxxxxxxxx>            http://www.chaosbits.net/
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
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