kernel - Silently swallow EOPNOTSUPP filter errors for select(2) in all cases

* This fixes hald

Reported-by: Rumko

diff --git a/sys/kern/sys_generic.c b/sys/kern/sys_generic.c
index 2e31710..40223eb 100644 (file)
--- a/sys/kern/sys_generic.c
+++ b/sys/kern/sys_generic.c
@@ -1023,9 +1023,14 @@ select_copyout(void *arg, struct kevent *kevp, int count, int *res)
                                /*
                                 * Select silently swallows any unknown errors
                                 * for descriptors in the read or write sets.
+                                *
+                                * ALWAYS filter out EOPNOTSUPP errors from
+                                * filters (at least until all filters support
+                                * EVFILT_EXCEPT)
                                 */
                                if (kevp[i].filter != EVFILT_READ &&
-                                   kevp[i].filter != EVFILT_WRITE) {
+                                   kevp[i].filter != EVFILT_WRITE &&
+                                   kevp[i].data != EOPNOTSUPP) {
                                        skap->error = kevp[i].data;
                                        *res = 0;
                                        return (1);