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crypto: prefix module autoloading with "crypto-"

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This prefixes all crypto module loading with "crypto-" so we never run
the risk of exposing module auto-loading to userspace via a crypto API,
as demonstrated by Mathias Krause:

https://lkml.org/lkml/2013/3/4/70

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kees Cook 2014-11-20 17:05:53 -08:00 • committed by Herbert Xu
parent 5d4a5e770d
commit 5d26a105b5
95 changed files with 155 additions and 123 deletions
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13
include/linux/crypto.h
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@ -25,6 +25,19 @@
#include <linux/string.h>
#include <linux/uaccess.h>
/*
* Autoloaded crypto modules should only use a prefixed name to avoid allowing
* arbitrary modules to be loaded. Loading from userspace may still need the
* unprefixed names, so retains those aliases as well.
* This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3
* gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro
* expands twice on the same line. Instead, use a separate base name for the
* alias.
*/
#define MODULE_ALIAS_CRYPTO(name) \
__MODULE_INFO(alias, alias_userspace, name); \
__MODULE_INFO(alias, alias_crypto, "crypto-" name)
/*
* Algorithm masks and types.
*/