The real bug is in the setting of MSG_TRUNC (which is the only side
effect of your change). So the better fix is:
--- net/core/scm.c.~1~ Tue Jun 15 09:19:30 1999
+++ net/core/scm.c Fri Nov 3 14:18:06 2000
@@ -251,7 +251,7 @@
msg->msg_controllen -= cmlen;
}
}
- if (i < fdnum)
+ if (i < fdnum || (fdnum && fdmax <= 0))
msg->msg_flags |= MSG_CTRUNC;
/*
-
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