On Mon, Dec 10, 2012 at 03:18:45PM -0800, mdf_at_freebsd.org wrote: m> On Mon, Dec 10, 2012 at 3:10 PM, Adrian Chadd <adrian_at_freebsd.org> wrote: m> > 9216 sounds like a jumbo frame mbuf. So the NIC is writing to an mbuf m> > after it's finalised/freed. m> > m> > I have a similar bug showing up on ath(4) RX. :( m> m> Compile with DEBUG_MEMGUARD in the kernel configuration, and then set m> vm.memguard.desc to the name of the UMA zone used for the 9216 byte m> allocations, mbuf_jumbo_9k. This should cause a panic when the memory m> is touched after free. DEBUG_MEMGUARD doesn't work with cluster zone, I'm afraid it won't work with mbuf_jumbo_9k, too, but I didn't try this. The problem is documented in BUGS in memguard(9). -- Totus tuus, Glebius.Received on Tue Dec 11 2012 - 06:53:45 UTC
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