File _service:tar_scm_kernel_repo:backport-libkmod-e... of Package kmod

File _service:tar_scm_kernel_repo:backport-libkmod-error-out-on-unknown-hash-algorithm.patch of Package kmod

From b9605c63b859adfffc0b4b9420d720aa323b90e9 Mon Sep 17 00:00:00 2001
From: Emil Velikov <emil.velikov@collabora.com>
Date: Mon, 6 Feb 2023 14:32:59 +0000
Subject: [PATCH 2/9] libkmod: error out on unknown hash algorithm

Currently if we see unknown algorithm, we'll do an OOB read in
pkey_hash_algo. This can happen for example if OPENSSL_NO_SM3 is set and
the kernel module uses a SM3 hash.

Cc: Mikhail Novosyolov <m.novosyolov@rosalinux.ru>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
Signed-off-by: Hangliang Lai <laihangliang1@huawei.com>
---
 libkmod/libkmod-signature.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libkmod/libkmod-signature.c b/libkmod/libkmod-signature.c
index 092f396..b749a81 100644
--- a/libkmod/libkmod-signature.c
+++ b/libkmod/libkmod-signature.c
@@ -219,6 +219,7 @@ static bool fill_pkcs7(const char *mem, off_t size,
 	unsigned char *key_id_str;
 	struct pkcs7_private *pvt;
 	const char *issuer_str;
+	int hash_algo;
 
 	size -= sig_len;
 	pkcs7_raw = mem + size;
@@ -277,7 +278,10 @@ static bool fill_pkcs7(const char *mem, off_t size,
 
 	X509_ALGOR_get0(&o, NULL, NULL, dig_alg);
 
-	sig_info->hash_algo = pkey_hash_algo[obj_to_hash_algo(o)];
+	hash_algo = obj_to_hash_algo(o);
+	if (hash_algo < 0)
+		goto err3;
+	sig_info->hash_algo = pkey_hash_algo[hash_algo];
 	// hash algo has not been recognized
 	if (sig_info->hash_algo == NULL)
 		goto err3;
-- 
2.30.0