crypto: chelsio - don't leak information from the stack to userspace
authorColin Ian King <colin.king@canonical.com>
Thu, 5 Apr 2018 16:44:03 +0000 (17:44 +0100)
committerHerbert Xu <herbert@gondor.apana.org.au>
Fri, 20 Apr 2018 16:58:31 +0000 (00:58 +0800)
commit2d93913e22013cb941fa7e1cf3d5e6649bc2bfad
treefa9b7f7c9c17286b8cdb27e65a28e837a3f761d0
parent3d8ccf9f6ef6b569b0821d75e4ada9430d3be462
crypto: chelsio - don't leak information from the stack to userspace

The structure crypto_info contains fields that are not initialized and
only .version is set.  The copy_to_user call is hence leaking information
from the stack to userspace which must be avoided. Fix this by zero'ing
all the unused fields.

Detected by CoverityScan, CID#1467421 ("Uninitialized scalar variable")

Fixes: a08943947873 ("crypto: chtls - Register chtls with net tls")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
drivers/crypto/chelsio/chtls/chtls_main.c