From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Mon, 1 May 2023 12:48:06 +0000 (+0200)
Subject: socket: Fix tst-cmsghdr-skeleton.c use of cmsg_len
X-Git-Tag: glibc-2.38~305
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7647d1901ea2b34fafd95ecddf52905a3d314368;p=thirdparty%2Fglibc.git

socket: Fix tst-cmsghdr-skeleton.c use of cmsg_len

cmsg_len is supposed to be socklen_t according to standards, but it was made
size_t on Linux, see BZ 16919. For ports that have it socklen_t, SIZE_MAX is
too large. We can however explicitly cast it to the type of cmsg_len so it
will fit according to that type.
---

diff --git a/socket/tst-cmsghdr-skeleton.c b/socket/tst-cmsghdr-skeleton.c
index 296a0a85812..9516139f875 100644
--- a/socket/tst-cmsghdr-skeleton.c
+++ b/socket/tst-cmsghdr-skeleton.c
@@ -49,7 +49,7 @@ RUN_TEST_FUNCNAME (CMSG_NXTHDR_IMPL) (void)
   /* The first header length is so big, using it would cause an overflow.  */
   cmsg = CMSG_FIRSTHDR (&m);
   TEST_VERIFY_EXIT ((char *) cmsg == cmsgbuf);
-  cmsg->cmsg_len = SIZE_MAX;
+  cmsg->cmsg_len = (__typeof (cmsg->cmsg_len)) SIZE_MAX;
   cmsg = CMSG_NXTHDR_IMPL (&m, cmsg);
   TEST_VERIFY_EXIT (cmsg == NULL);