On Thursday, 21 October 2021 12:41:34 CEST Salvatore Bonaccorso wrote: > On Thu, Oct 21, 2021 at 09:38:00AM +0000, Daniel Black wrote: > > Package: src:linux > > Version: 5.14.12-1 > > The good news is I've validated that the linux mainline 5.14.14 build > > from https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14.14/ has > > actually fixed this problem. > > Where you able to isolate the upstream change landed upstream which > fixes the issue?
There has been 1 change in fs/io_uring.c that is part of 5.14.14 (and 5.14.13), but not 5.14.12 and that is this commit: e798dcd960a3f0d40302a1bbf7f755879195a163 "io_uring: kill fasync" Possibly the simplest way to verify whether it's indeed that commit that fixes the issue is to apply the patch to Debian's 5.14.12 kernel. Instructions here (also follow 4.2.1): https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#s4.2.2 This would narrow it down to this specific commit and would also rule out differences in Ubuntu's kernel config and Debian's. Cheers, Diederik
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