Re: Null pointer dereference in tg3_poll_work running linux-3.4

On Tue, Mar 28, 2017 at 11:53 AM, Michael Chan
[off-list ref] wrote:

I don't remember any bug fixes related to this logic.  One possibility
is that there is DMA corruption and we are getting a bad opaque value.
If you have the core dump, it will be useful to look at the receive
completion ring.   These opaque values are simple index values and
should be in sequence.

Unfortunately I don't have a core dump, this has happened around 5
times on boxes that have been up between 2 and 7 months. So it
seems extremely rare. So far, the only information I have is the
stack trace.