tests: fix unaligned access in nlattr.test

* tests/nlattr.c (test_nlattr): Use SET_STRUCT
to initialize potentially unaligned struct nlattr.

diff --git a/tests/nlattr.c b/tests/nlattr.c
index f7da752d1b28c6004b71dcf340adb03b50836189..a2d59d42cb97d74a257a0e2f4c0996ccd2709346 100644 (file)
--- a/tests/nlattr.c
+++ b/tests/nlattr.c
@@ -144,10 +144,10 @@ test_nlattr(const int fd)
        msg = tail_memdup(&c_msg, msg_len);
        memcpy(&msg->nlh.nlmsg_len, &msg_len, sizeof(msg_len));
        nla = NLMSG_ATTR(msg, sizeof(msg->udm));
-       *nla = (struct nlattr) {
+       SET_STRUCT(struct nlattr, nla,
                .nla_len = NLA_HDRLEN,
                .nla_type = UNIX_DIAG_NAME
-       };
+       );
        memcpy(nla + 1, "12", 2);
        rc = sendto(fd, msg, msg_len, MSG_DONTWAIT, NULL, 0);
        printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
@@ -156,17 +156,17 @@ test_nlattr(const int fd)
               ", udiag_ino=0, udiag_cookie=[0, 0]}, [{nla_len=%u"
               ", nla_type=UNIX_DIAG_NAME}, \"\\x31\\x32\"]}, %u"
               ", MSG_DONTWAIT, NULL, 0) = %s\n",
-              fd, msg_len, nla->nla_len, msg_len, sprintrc(rc));
+              fd, msg_len, NLA_HDRLEN, msg_len, sprintrc(rc));
 
        /* print one struct nlattr and short read of second struct nlattr */
        msg_len = NLMSG_SPACE(sizeof(msg->udm)) + NLA_HDRLEN * 2;
        msg = tail_memdup(&c_msg, msg_len - 1);
        memcpy(&msg->nlh.nlmsg_len, &msg_len, sizeof(msg_len));
        nla = NLMSG_ATTR(msg, sizeof(msg->udm));
-       *nla = (struct nlattr) {
+       SET_STRUCT(struct nlattr, nla,
                .nla_len = NLA_HDRLEN,
                .nla_type = UNIX_DIAG_NAME
-       };
+       );
        rc = sendto(fd, msg, msg_len, MSG_DONTWAIT, NULL, 0);
        printf("sendto(%d, {{len=%u, type=SOCK_DIAG_BY_FAMILY"
               ", flags=NLM_F_DUMP, seq=0, pid=0}, {udiag_family=AF_UNIX"
@@ -174,7 +174,7 @@ test_nlattr(const int fd)
               ", udiag_ino=0, udiag_cookie=[0, 0]}, [{nla_len=%u"
               ", nla_type=UNIX_DIAG_NAME}, %p]}, %u"
               ", MSG_DONTWAIT, NULL, 0) = %s\n",
-              fd, msg_len, nla->nla_len, nla + 1, msg_len, sprintrc(rc));
+              fd, msg_len, NLA_HDRLEN, nla + 1, msg_len, sprintrc(rc));
 
        /* print two struct nlattr */
        msg_len = NLMSG_SPACE(sizeof(msg->udm)) + NLA_HDRLEN * 2;