** Description changed: + [SRU Justification] + + == Impact == + + 1bd4978a88ac2 ("tun: honor IFF_UP in tun_get_user()") which is part of + kernel v4.5 introduced an issue where userspace processes might not get + notified if a link comes up after initially being down. This was fixed + in the requested backport (from 4.17). + + == Fix == + + Backport the requested patch to Bionic (4.15). Xenial (4.4) is not + affected and Disco and later already contain that fix. + + == Risk of Regregression == + + The change only slightly modifies a very specific protocol function. + Risk should be low and limited to tuntap. + + --- + The upstream commit 2f3ab6221e4c ("tuntap: correctly set SOCKWQ_ASYNC_NOSPACE") is missing. Without this patch, userspace apps that use tuntap may be blocked. - https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2f3ab6221e4c
** Changed in: linux (Ubuntu) Status: In Progress => Fix Released ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1830756 Title: tuntap: correctly set SOCKWQ_ASYNC_NOSPACE To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1830756/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs