From: Lans Zhang <jia.zhang@windriver.com>
Date: Sun, 17 Jul 2016 23:10:47 +0000 (+0100)
Subject: pefile: Fix the failure of calculation for digest
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d128471a14775cd11abd81c09b2a086997ab3150;p=linux.git

pefile: Fix the failure of calculation for digest

Commit e68503bd68 forgot to set digest_len and thus cause the following
error reported by kexec when launching a crash kernel:

	kexec_file_load failed: Bad message

Fixes: e68503bd68 (KEYS: Generalise system_verify_data() to provide access to internal content)
Signed-off-by: Lans Zhang <jia.zhang@windriver.com>
Tested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
cc: kexec@lists.infradead.org
cc: linux-crypto@vger.kernel.org
Signed-off-by: James Morris <james.l.morris@oracle.com>
---

diff --git a/crypto/asymmetric_keys/mscode_parser.c b/crypto/asymmetric_keys/mscode_parser.c
index 6a76d5c70ef6e..9492e1c22d389 100644
--- a/crypto/asymmetric_keys/mscode_parser.c
+++ b/crypto/asymmetric_keys/mscode_parser.c
@@ -124,5 +124,10 @@ int mscode_note_digest(void *context, size_t hdrlen,
 	struct pefile_context *ctx = context;
 
 	ctx->digest = kmemdup(value, vlen, GFP_KERNEL);
-	return ctx->digest ? 0 : -ENOMEM;
+	if (!ctx->digest)
+		return -ENOMEM;
+
+	ctx->digest_len = vlen;
+
+	return 0;
 }