[PATCH 4.18 024/145] Replace magic for trusting the secondary keyring with #define
STALE2943d
From: gregkh@linuxfoundation.org (Greg Kroah-Hartman)
Date: 2018-09-07 21:13:18
Also in:
keyrings, lkml, stable
4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yannik Sembritzki <redacted> commit 817aef260037f33ee0f44c17fe341323d3aebd6d upstream. Replace the use of a magic number that indicates that verify_*_signature() should use the secondary keyring with a symbol. Signed-off-by: Yannik Sembritzki <redacted> Signed-off-by: David Howells <dhowells@redhat.com> Cc: keyrings at vger.kernel.org Cc: linux-security-module at vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- certs/system_keyring.c | 3 ++- crypto/asymmetric_keys/pkcs7_key_type.c | 2 +- include/linux/verification.h | 6 ++++++ 3 files changed, 9 insertions(+), 2 deletions(-)
--- a/certs/system_keyring.c
+++ b/certs/system_keyring.c@@ -15,6 +15,7 @@ #include <linux/cred.h> #include <linux/err.h> #include <linux/slab.h> +#include <linux/verification.h> #include <keys/asymmetric-type.h> #include <keys/system_keyring.h> #include <crypto/pkcs7.h>
@@ -230,7 +231,7 @@ int verify_pkcs7_signature(const void *d if (!trusted_keys) { trusted_keys = builtin_trusted_keys; - } else if (trusted_keys == (void *)1UL) { + } else if (trusted_keys == VERIFY_USE_SECONDARY_KEYRING) { #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING trusted_keys = secondary_trusted_keys; #else --- a/crypto/asymmetric_keys/pkcs7_key_type.c +++ b/crypto/asymmetric_keys/pkcs7_key_type.c
@@ -63,7 +63,7 @@ static int pkcs7_preparse(struct key_pre return verify_pkcs7_signature(NULL, 0, prep->data, prep->datalen, - (void *)1UL, usage, + VERIFY_USE_SECONDARY_KEYRING, usage, pkcs7_view_content, prep); } --- a/include/linux/verification.h +++ b/include/linux/verification.h
@@ -13,6 +13,12 @@ #define _LINUX_VERIFICATION_H /* + * Indicate that both builtin trusted keys and secondary trusted keys + * should be used. + */ +#define VERIFY_USE_SECONDARY_KEYRING ((struct key *)1UL) + +/* * The use to which an asymmetric key is being put. */ enum key_being_used_for {