X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Flibelogind%2Fsd-daemon%2Fsd-daemon.c;h=749a3646d709193058ce42f791c568c1d124f4aa;hb=c221e39a6dce308a639185833310b995aad1fc56;hp=b26ecf26d5fff5d0c6041aeae6b26639df21fc3d;hpb=be70ef286ad74a5d9db1716d1b097ff0dbd3e713;p=elogind.git

diff --git a/src/libelogind/sd-daemon/sd-daemon.c b/src/libelogind/sd-daemon/sd-daemon.c
index b26ecf26d..749a3646d 100644
--- a/src/libelogind/sd-daemon/sd-daemon.c
+++ b/src/libelogind/sd-daemon/sd-daemon.c
@@ -456,8 +456,10 @@ _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char
 
         if (n_fds > 0 || have_pid) {
                 /* CMSG_SPACE(0) may return value different then zero, which results in miscalculated controllen. */
-                msghdr.msg_controllen = (n_fds ? CMSG_SPACE(sizeof(int) * n_fds) : 0) +
-                                        CMSG_SPACE(sizeof(struct ucred)) * have_pid;
+                msghdr.msg_controllen =
+                        (n_fds > 0 ? CMSG_SPACE(sizeof(int) * n_fds) : 0) +
+                        (have_pid ? CMSG_SPACE(sizeof(struct ucred)) : 0);
+
                 msghdr.msg_control = alloca(msghdr.msg_controllen);
 
                 cmsg = CMSG_FIRSTHDR(&msghdr);