Date: Sat, 06 Jun 2015 14:37:01 -0400 From: starlight.2015q2@binnacle.cx

At 04:12 6/7/2015 +1000, teor wrote:

...

Please let me know how you go - the 0.2.6.x series should also be relatively ASAN and UBSAN clean, as Tor has been tested with them since late 2014.

I've run 0.2.4.x and 0.2.5.x with ASAN live in production with no problems when the relay had less bandwidth. Performance hit is something like 30% extra CPU. Also had it on libssl.so and libevent.so, but was too expensive to run on libcrypto.so.

UBSAN seems expense and doesn't seem it would run other than test, but I didn't work on it long and am not 100% certain. Was trying ASAN extra stack checking at the time, which may have been the culprit.

As I said in my previous email, if you're running releases before 0.2.6.6 (2015), Tor won't run under UBSAN due to issues that have been fixed in subsequent releases.

If you're running on architectures other than x86_64, Tor won't run under UBSAN due to a known issue in the donna C code.

teor

teor2345 at gmail dot com pgp 0xABFED1AC https://gist.github.com/teor2345/d033b8ce0a99adbc89c5

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