@Tom Sounds like a winner to me! I've submitted the patch to our process
pipeline:
https://lists.ubuntu.com/archives/kernel-team/2019-October/105155.html
A post will appear here once it lands in a production Bionic kernel
(most likely in our next three-week cycle, around 18-Nov).
Thanks again for doing the leg-work on this!
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Kamal Mostafa (kamalmostafa)
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1843487
Title:
UIO: mutex used in interrupt handler causes crash
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Bionic:
In Progress
Bug description:
Running:
Bionic Beaver
Ubuntu 4.15.0-62.69-generic 4.15.18
Problem since: Ubuntu-4.15.0-59.66
In commit 725bbc87 on 2/13/2019 in uio.c a mutex_lock was added to
uio_interrupt. This results in a "scheduling while atomic" error if
someone else owns the mutex at the time it is invoked.
The following commit in the kernel mainline appears to fix this issue:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3d27c4de8d4fb2d4099ff324671792aa2578c6f9
To manage notifications about this bug go to:
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