Patch "asymmetric_keys: log on fatal failures in PE/pkcs7" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    asymmetric_keys: log on fatal failures in PE/pkcs7

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     asymmetric_keys-log-on-fatal-failures-in-pe-pkcs7.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit d124b0f283b3b68a4f7ddf7741506688b7373333
Author: Robbie Harwood <rharwood@xxxxxxxxxx>
Date:   Mon Feb 20 12:12:54 2023 -0500

    asymmetric_keys: log on fatal failures in PE/pkcs7
    
    [ Upstream commit 3584c1dbfffdabf8e3dc1dd25748bb38dd01cd43 ]
    
    These particular errors can be encountered while trying to kexec when
    secureboot lockdown is in place.  Without this change, even with a
    signed debug build, one still needs to reboot the machine to add the
    appropriate dyndbg parameters (since lockdown blocks debugfs).
    
    Accordingly, upgrade all pr_debug() before fatal error into pr_warn().
    
    Signed-off-by: Robbie Harwood <rharwood@xxxxxxxxxx>
    Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
    cc: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
    cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
    cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
    cc: keyrings@xxxxxxxxxxxxxxx
    cc: linux-crypto@xxxxxxxxxxxxxxx
    cc: kexec@xxxxxxxxxxxxxxxxxxx
    Link: https://lore.kernel.org/r/20230220171254.592347-3-rharwood@xxxxxxxxxx/ # v2
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/crypto/asymmetric_keys/pkcs7_verify.c b/crypto/asymmetric_keys/pkcs7_verify.c
index f94a1d1ad3a6c..df279538cead3 100644
--- a/crypto/asymmetric_keys/pkcs7_verify.c
+++ b/crypto/asymmetric_keys/pkcs7_verify.c
@@ -79,16 +79,16 @@ static int pkcs7_digest(struct pkcs7_message *pkcs7,
 		}
 
 		if (sinfo->msgdigest_len != sig->digest_size) {
-			pr_debug("Sig %u: Invalid digest size (%u)\n",
-				 sinfo->index, sinfo->msgdigest_len);
+			pr_warn("Sig %u: Invalid digest size (%u)\n",
+				sinfo->index, sinfo->msgdigest_len);
 			ret = -EBADMSG;
 			goto error;
 		}
 
 		if (memcmp(sig->digest, sinfo->msgdigest,
 			   sinfo->msgdigest_len) != 0) {
-			pr_debug("Sig %u: Message digest doesn't match\n",
-				 sinfo->index);
+			pr_warn("Sig %u: Message digest doesn't match\n",
+				sinfo->index);
 			ret = -EKEYREJECTED;
 			goto error;
 		}
@@ -481,7 +481,7 @@ int pkcs7_supply_detached_data(struct pkcs7_message *pkcs7,
 			       const void *data, size_t datalen)
 {
 	if (pkcs7->data) {
-		pr_debug("Data already supplied\n");
+		pr_warn("Data already supplied\n");
 		return -EINVAL;
 	}
 	pkcs7->data = data;
diff --git a/crypto/asymmetric_keys/verify_pefile.c b/crypto/asymmetric_keys/verify_pefile.c
index fe1bb374239d7..22beaf2213a22 100644
--- a/crypto/asymmetric_keys/verify_pefile.c
+++ b/crypto/asymmetric_keys/verify_pefile.c
@@ -74,7 +74,7 @@ static int pefile_parse_binary(const void *pebuf, unsigned int pelen,
 		break;
 
 	default:
-		pr_debug("Unknown PEOPT magic = %04hx\n", pe32->magic);
+		pr_warn("Unknown PEOPT magic = %04hx\n", pe32->magic);
 		return -ELIBBAD;
 	}
 
@@ -95,7 +95,7 @@ static int pefile_parse_binary(const void *pebuf, unsigned int pelen,
 	ctx->certs_size = ddir->certs.size;
 
 	if (!ddir->certs.virtual_address || !ddir->certs.size) {
-		pr_debug("Unsigned PE binary\n");
+		pr_warn("Unsigned PE binary\n");
 		return -ENODATA;
 	}
 
@@ -127,7 +127,7 @@ static int pefile_strip_sig_wrapper(const void *pebuf,
 	unsigned len;
 
 	if (ctx->sig_len < sizeof(wrapper)) {
-		pr_debug("Signature wrapper too short\n");
+		pr_warn("Signature wrapper too short\n");
 		return -ELIBBAD;
 	}
 
@@ -142,16 +142,16 @@ static int pefile_strip_sig_wrapper(const void *pebuf,
 	 * rounded up since 0.110.
 	 */
 	if (wrapper.length > ctx->sig_len) {
-		pr_debug("Signature wrapper bigger than sig len (%x > %x)\n",
-			 ctx->sig_len, wrapper.length);
+		pr_warn("Signature wrapper bigger than sig len (%x > %x)\n",
+			ctx->sig_len, wrapper.length);
 		return -ELIBBAD;
 	}
 	if (wrapper.revision != WIN_CERT_REVISION_2_0) {
-		pr_debug("Signature is not revision 2.0\n");
+		pr_warn("Signature is not revision 2.0\n");
 		return -ENOTSUPP;
 	}
 	if (wrapper.cert_type != WIN_CERT_TYPE_PKCS_SIGNED_DATA) {
-		pr_debug("Signature certificate type is not PKCS\n");
+		pr_warn("Signature certificate type is not PKCS\n");
 		return -ENOTSUPP;
 	}
 
@@ -164,7 +164,7 @@ static int pefile_strip_sig_wrapper(const void *pebuf,
 	ctx->sig_offset += sizeof(wrapper);
 	ctx->sig_len -= sizeof(wrapper);
 	if (ctx->sig_len < 4) {
-		pr_debug("Signature data missing\n");
+		pr_warn("Signature data missing\n");
 		return -EKEYREJECTED;
 	}
 
@@ -198,7 +198,7 @@ static int pefile_strip_sig_wrapper(const void *pebuf,
 		return 0;
 	}
 not_pkcs7:
-	pr_debug("Signature data not PKCS#7\n");
+	pr_warn("Signature data not PKCS#7\n");
 	return -ELIBBAD;
 }
 
@@ -341,8 +341,8 @@ static int pefile_digest_pe(const void *pebuf, unsigned int pelen,
 	digest_size = crypto_shash_digestsize(tfm);
 
 	if (digest_size != ctx->digest_len) {
-		pr_debug("Digest size mismatch (%zx != %x)\n",
-			 digest_size, ctx->digest_len);
+		pr_warn("Digest size mismatch (%zx != %x)\n",
+			digest_size, ctx->digest_len);
 		ret = -EBADMSG;
 		goto error_no_desc;
 	}
@@ -373,7 +373,7 @@ static int pefile_digest_pe(const void *pebuf, unsigned int pelen,
 	 * PKCS#7 certificate.
 	 */
 	if (memcmp(digest, ctx->digest, ctx->digest_len) != 0) {
-		pr_debug("Digest mismatch\n");
+		pr_warn("Digest mismatch\n");
 		ret = -EKEYREJECTED;
 	} else {
 		pr_debug("The digests match!\n");