Am Mittwoch 04 Januar 2006 22:15 schrieb Greg KH:
> Yes, Stefan, care to redo this with an updated changelog command?
dm-crypt should clear struct crypt_config before freeing it to
avoid information leak f.e. to a swsusp image.
Signed-off-by: Stefan Rompf <[email protected]>
Acked-by: Clemens Fruhwirth <[email protected]>
--- linux-2.6.15/drivers/md/dm-crypt.c.orig 2006-01-04 01:01:16.000000000 +0100
+++ linux-2.6.15/drivers/md/dm-crypt.c 2006-01-04 22:35:13.000000000 +0100
@@ -690,6 +690,8 @@
bad2:
crypto_free_tfm(tfm);
bad1:
+ /* Zero key material before free to avoid information leak */
+ memset(cc, 0, sizeof(*cc) + cc->key_size * sizeof(u8));
kfree(cc);
return -EINVAL;
}
@@ -706,6 +708,9 @@
cc->iv_gen_ops->dtr(cc);
crypto_free_tfm(cc->tfm);
dm_put_device(ti, cc->dev);
+
+ /* Zero key material before free to avoid information leak */
+ memset(cc, 0, sizeof(*cc) + cc->key_size * sizeof(u8));
kfree(cc);
}
-
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