I checked out the focal kernel and reverted the following commits. And
the problem went away, reverting just the 1st one wasn't enough to fix
the issue.
- NFSv4: nfs_atomic_open() can race when looking up a non-regular file
- NFSv4: Handle case where the lookup of a directory fails
git clone git
Looks like a nfs patch for
https://bugs.launchpad.net/bugs/cve/2022-24448 was introduced in
5.13.0-40 and linux-image-5.4.0-109. So could be cause of regression.
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** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2022-24448
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https://bugs.launchpad.net/bugs/1971482
Title:
nfs cannot access/list wildcard file unless its cached
To manage
Also noticed the issue on a 20.04 server which got updated to kernel
5.13.0-40. Downgrading to 5.13.0-39 fixed the issue.
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Title:
nfs cannot acc
Attaching tcpdump for machine seeing errors
$ sudo tcpdump -w /tmp/data.pcap -i bond0 host 10.0.0.23
** Attachment added: "data.pcap"
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.4/+bug/1971482/+attachment/5586399/+files/data.pcap
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