On Mon, Dec 10, 2012 at 03:18:45PM -0800, m...@freebsd.org wrote: m> On Mon, Dec 10, 2012 at 3:10 PM, Adrian Chadd <adr...@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. _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
