[Bug 211836] Kernel panic with net.isr enabled

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211836

--- Comment #10 from Andrey V. Elsukov <ae at FreeBSD.org> ---
(In reply to Babak Farrokhi from comment #9)
> Created attachment 173703 [details]
> textdump after applying patch from @ae
> 
> Panicked again after patch

Ok, this is yet another case :)
Can you test this patch instead? It should cover both (all) cases.
The NETISR_DISPATCH_HYBRID case looks not quite correct, but it is better than
panic...

Index: sys/net/netisr.c
===================================================================
--- sys/net/netisr.c    (revision 304101)
+++ sys/net/netisr.c    (working copy)
@@ -810,10 +810,12 @@ netisr_select_cpuid(struct netisr_proto *npp, u_in
                 * dispatch.  In the queued case, fall back on the SOURCE
                 * policy.
                 */
-               if (*cpuidp != NETISR_CPUID_NONE)
+               if (*cpuidp != NETISR_CPUID_NONE) {
+                       *cpuidp = nws_array[ *cpuidp % nws_count ];
                        return (m);
+               }
                if (dispatch_policy == NETISR_DISPATCH_HYBRID) {
-                       *cpuidp = curcpu;
+                       *cpuidp = nws_array[ curcpu % nws_count ];
                        return (m);
                }
                policy = NETISR_POLICY_SOURCE;

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