** Changed in: linux (Ubuntu Xenial)
Status: Triaged => Fix Committed
** Changed in: linux (Ubuntu Bionic)
Status: Triaged => Confirmed
** Changed in: linux (Ubuntu Bionic)
Status: Confirmed => Fix Committed
** Changed in: linux (Ubuntu Cosmic)
Status: Triaged => Fix Committed
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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 Committed
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
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