[Bug 173724] [kernel] SYSV semaphore adjustment incorrect for SETVAL for array with 2 or more semaphores

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=173724

--- Comment #3 from Anton Lavrentiev <lavr at ncbi.nlm.nih.gov> ---
The bug was fixed in Cygwin (long time ago!) by moving the following comparison
with -1 for inequality _inside_ this "if" in the semundo_clear() function.  In
the current FreeBSD source code it's still outside the if:

                                if (semnum == -1 || sunptr->un_num == semnum) {
                                ...
+                                       if (semnum != -1)
+                                               break;
                                }
-                               if (semnum != -1)
-                                       break;

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