** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Kamal Mostafa (kamalmostafa)
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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
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
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