This bug was fixed in the package linux - 4.18.0-15.16
---------------
linux (4.18.0-15.16) cosmic; urgency=medium
* Ubuntu boot failure. 4.18.0-14 boot stalls. (does not boot) (LP: #1814555)
- Revert "drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5"
* Userspace break as a result of missing patch backport (LP: #1813873)
- tty: Don't hold ldisc lock in tty_reopen() if ldisc present
-- Stefan Bader <stefan.ba...@canonical.com> Thu, 07 Feb 2019 11:24:34
+0100
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1813873
Title:
Userspace break as a result of missing patch backport
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Xenial:
Fix Committed
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Cosmic:
Fix Released
Bug description:
Hi,
The most recent set of Ubuntu kernels applied a variety of tty patches
including:
https://github.com/torvalds/linux/commit/c96cf923a98d1b094df9f0cf97a83e118817e31b
But have not applied the more recent
https://github.com/torvalds/linux/commit/d3736d82e8169768218ee0ef68718875918091a0
patch.
This second patch is required to prevent a rather serious regression
where userspace applications reading from stdin can receive EAGAIN
when they should not.
I will try to link correspondence from the mailing list archives once
they are available, but for now if you have access to the linux-
console mailing list you can find discussion under the thread
"Userspace break? read from STDIN returns EAGAIN if tty is "touched"".
I would appreciate it if this could be examined soon as it is a
regression on userspace.
Thanks
Michael
Good:
4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018
Bad:
4.15.0-44-generic #47-Ubuntu SMP Mon Jan 14 11:26:59 UTC 2019
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813873/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
