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Date:      Mon, 15 Aug 2016 13:44:41 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-net@FreeBSD.org
Subject:   [Bug 211836] Kernel panic with net.isr enabled
Message-ID:  <bug-211836-2472-cexX4JCXwZ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-211836-2472@https.bugs.freebsd.org/bugzilla/>
References:  <bug-211836-2472@https.bugs.freebsd.org/bugzilla/>

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

--- Comment #7 from Andrey V. Elsukov <ae@FreeBSD.org> ---
So, it looks like this is enough to fix the panic:

Index: sys/net/netisr.c
===================================================================
--- sys/net/netisr.c    (revision 304101)
+++ sys/net/netisr.c    (working copy)
@@ -1014,7 +1014,7 @@ netisr_queue_internal(u_int proto, struct mbuf *m,

        dosignal = 0;
        error = 0;
-       nwsp = DPCPU_ID_PTR(cpuid, nws);
+       nwsp = DPCPU_ID_PTR(nws_array[cpuid % nws_count], nws);
        npwp = &nwsp->nws_work[proto];
        NWS_LOCK(nwsp);
        error = netisr_queue_workstream(nwsp, proto, npwp, m, &dosignal);

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