Messages in this thread | | | Date | Wed, 28 Jun 2006 12:49:06 -0700 | From | Andrew Morton <> | Subject | Re: 2.6.17-mm2 |
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On Wed, 28 Jun 2006 12:22:02 -0700 Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> Andrew Morton wrote: > > Found a way to reproduce it - do `cat /proc/slabinfo > /dev/null' in a > > tight loop. With that happening, a little two-way wasn't able to make > > it through `dbench 4' without soiling the upholstery. Then bisection-searching. > > > It's surprising it was so subtle. I'd been running with that code for a > month or so without a peep of problem... >
It'll only bite if someone does snprintf() into a too-short buffer. That's rare (it's usually a bug). But it looks like the seq_file() code does it when someone is trying to generate more than PAGE_SIZE's worth of data. Like /proc/slabinfo.
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