-stable review patch. If anyone has any objections, please let us know.
------------------
Zap the memory before freeing it so we don't leave crypto information
around in memory.
Signed-off-by: Stefan Rompf <[email protected]>
Acked-by: Clemens Fruhwirth <[email protected]>
Acked-by: Alasdair G Kergon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Chris Wright <[email protected]>
---
drivers/md/dm-crypt.c | 5 +++++
1 files changed, 5 insertions(+)
Index: linux-2.6.15.3/drivers/md/dm-crypt.c
===================================================================
--- linux-2.6.15.3.orig/drivers/md/dm-crypt.c
+++ linux-2.6.15.3/drivers/md/dm-crypt.c
@@ -690,6 +690,8 @@ bad3:
bad2:
crypto_free_tfm(tfm);
bad1:
+ /* Must zero key material before freeing */
+ memset(cc, 0, sizeof(*cc) + cc->key_size * sizeof(u8));
kfree(cc);
return -EINVAL;
}
@@ -706,6 +708,9 @@ static void crypt_dtr(struct dm_target *
cc->iv_gen_ops->dtr(cc);
crypto_free_tfm(cc->tfm);
dm_put_device(ti, cc->dev);
+
+ /* Must zero key material before freeing */
+ memset(cc, 0, sizeof(*cc) + cc->key_size * sizeof(u8));
kfree(cc);
}
--
-
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