Here are my attempts to answer the questions in the SRU template. I'm not an Ubuntu developer, and I don't speak Debian package language (I speak RPM, but that's rather different), so I'm not going to send an actual debdiff or whatever it's called.
Note, however, that I confused myself with the git history. The latest upstream release in the 0.20 series is 0.20.7, and 0.20.7 does not have the fix. The fix I linked applies directly on top of 0.20.7. This bug should therefore be fixed in Vivid before worrying about backports. The fix does *not* apply to 0.20.3 as is. I can try to backport it, but I'd want confirmation that it would be likely to be applied (as opposed to bumping p11-kit to a newer microrelease or just leaving it unfixed). [Impact] Multithreaded programs that use p11-kit and call fork can deadlock due to a race. More complex programs that use certain malloc replacements and link to libraries like libvmime may deadlock when forking as well, even if they don't use p11-kit. The deadlock is caused by the use of non async-signal-safe functions in an atfork handler in p11-kit. [Test Case] Compile and run the attached program. With a buggy p11-kit, it is very likely to deadlock. With a fixed p11-kit, it will exit after about five seconds. [Regression Potential] When I looked at the patch, it looked straightforward. ** Attachment added: "p11kit_hang.c" https://bugs.launchpad.net/ubuntu/+source/p11-kit/+bug/1381743/+attachment/4264589/+files/p11kit_hang.c -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to p11-kit in Ubuntu. https://bugs.launchpad.net/bugs/1381743 Title: Please consider backporting a p11-kit deadlock fix Status in “p11-kit” package in Ubuntu: New Bug description: Linking against p11-kit or gnutls (especially the outdated gnutls in Trusty) can cause fork() to deadlock randomly. Please consider backporting the stable fix here: http://cgit.freedesktop.org/p11-glue/p11-kit/commit/?h=stable&id=0ecc141f372b375ddd2087a8ca406797976f03bf To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/p11-kit/+bug/1381743/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
