** Changed in: linux (Ubuntu Noble)
Status: New => In Progress
** Changed in: linux (Ubuntu Noble)
Importance: Undecided => Medium
** Tags added: noble sts
** Changed in: linux (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/2082423
Title:
Unable to list directories using CIFS on 6.8 kernel
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Noble:
In Progress
Bug description:
[impact]
Currently on the latest version of the 6.8 kernel, there is an issue where
listing directories with CIFS fails and returns an error stating that the
operation is not permitted.
There is an upstream patch to fix the issue:
https://git.kernel.dk/?p=linux-block.git;a=commitdiff;h=ec686804117a0421cf31d54427768aaf93aa0069
And I have back ported to Noble 6.8. Note that the same issue also affects
jammy HWE 6.8.
[Test Plan]
1. Create a CIFS share.
2. Populate the CIFS share directory with files.
3. connect to the CIFS share using a ubuntu noble machine or a jammy machine
running 6.8 HWE. Steps to connect to a CIFS share can be found here:
https://ubuntu.com/server/docs/how-to-mount-cifs-shares-permanently
4. Once mounted, access the share and try listing the content of the
directory with "ls".
5. This will result in the following errors:
ls: cannot access 'file1': Operation not supported
ls: cannot access 'file2': Operation not supported
ls: cannot access 'file3': Operation not supported
ls: cannot access 'file4': Operation not supported
6. Looking at dmesg, the following traces can be seen:
CIFS: VFS: parse_reparse_point: unhandled reparse tag: 0x0000001b
CIFS: fs/smb/client/dir.c: Unexpected lookup error -95
7. The expected output would be to have the files listed wihtout any
"operation not supported" errors or dmesg CIFS related error logs.
[Fix]
The fix is already upstream and is provided by:
* ec686804117a smb: client: ignore unhandled reparse tags
The patch does not apply cleanly due to the following missing commit:
c520ba7573a8 smb: client: move most of reparse point handling code to common
file
So I had to do a few modifications.
[where problems could occur]
* The patch might not fix the issue and it might still be present in some
scenarios.
* Other CIFS commands might break.
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