From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sun, 29 Aug 2021 11:55:44 +0000 (+0900)
Subject: timesync: check cmsg length
X-Git-Tag: v250-rc1~755^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F20567%2Fhead;p=thirdparty%2Fsystemd.git

timesync: check cmsg length
---

diff --git a/src/timesync/timesyncd-manager.c b/src/timesync/timesyncd-manager.c
index d7f511ee221..d7060aaa45c 100644
--- a/src/timesync/timesyncd-manager.c
+++ b/src/timesync/timesyncd-manager.c
@@ -471,6 +471,8 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re
 
                 switch (cmsg->cmsg_type) {
                 case SCM_TIMESTAMPNS:
+                        assert(cmsg->cmsg_len == CMSG_LEN(sizeof(struct timespec)));
+
                         recv_time = (struct timespec *) CMSG_DATA(cmsg);
                         break;
                 }