File ec3d9000.patch of Package protobuf-c

From 289f5c18b195aa43d46a619d1188709abbfa9c82 Mon Sep 17 00:00:00 2001
From: 10054172 <hui.zhang@thalesgroup.com>
Date: Fri, 18 Mar 2022 12:42:57 -0400
Subject: [PATCH 1/2] Fix issue #499: unsigned integer overflow

Signed-off-by: 10054172 <hui.zhang@thalesgroup.com>
---
 protobuf-c/protobuf-c.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/protobuf-c/protobuf-c.c b/protobuf-c/protobuf-c.c
index 98052cdb..ec2d40a1 100644
--- a/protobuf-c/protobuf-c.c
+++ b/protobuf-c/protobuf-c.c
@@ -2603,10 +2603,13 @@ parse_required_member(ScannedMember *scanned_member,
 			return FALSE;
 
 		def_mess = scanned_member->field->default_value;
-		subm = protobuf_c_message_unpack(scanned_member->field->descriptor,
-						 allocator,
-						 len - pref_len,
-						 data + pref_len);
+		if (len > pref_len)
+			subm = protobuf_c_message_unpack(scanned_member->field->descriptor,
+							 allocator,
+							 len - pref_len,
+							 data + pref_len);
+		else
+			subm = NULL;
 
 		if (maybe_clear &&
 		    *pmessage != NULL &&

From 0d1fd124a4e0a07b524989f6e64410ff648fba61 Mon Sep 17 00:00:00 2001
From: "Todd C. Miller" <Todd.Miller@sudo.ws>
Date: Thu, 9 Jun 2022 07:34:55 -0600
Subject: [PATCH 2/2] Fix regression with zero-length messages introduced in
 protobuf-c PR 500.

[edmonds: Import bugfix from
https://github.com/sudo-project/sudo/commit/b6a6451482a3ff5e30f43ef888159d4b0d39143b.patch.]
---
 protobuf-c/protobuf-c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/protobuf-c/protobuf-c.c b/protobuf-c/protobuf-c.c
index ec2d40a1..448f3e81 100644
--- a/protobuf-c/protobuf-c.c
+++ b/protobuf-c/protobuf-c.c
@@ -2603,7 +2603,7 @@ parse_required_member(ScannedMember *scanned_member,
 			return FALSE;
 
 		def_mess = scanned_member->field->default_value;
-		if (len > pref_len)
+		if (len >= pref_len)
 			subm = protobuf_c_message_unpack(scanned_member->field->descriptor,
 							 allocator,
 							 len - pref_len,