On Tue, May 28, 2013 at 02:22:11PM -0400, Vince Weaver wrote: > On Tue, 28 May 2013, Vince Weaver wrote: > > > It looks like this is already in tip, but I can confirm that this > > patch seems to fix things on my machine and holds up against longer > > fuzzing runs. > > OK, I take it back. Even with the new patch applied, my fuzzer can still > make the kernel leak user->locked_vm > > I assume that the locked_vm value should go back to 0 once a process that > has a bunch of mmap'd perf_events opened exits?
Yep. > I admit this is sort of an obscure corner case, but it does mean that a > user can leak user->locked_vm to the point that "perf record" no longer > works. Hurm.. I don't suppose you have an easy reproducer handy eh? I'll go stare at it. At least the current state is better than before, but clearly we're not quite there yet. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
