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General Questions • [Software] Help investigating/reporting possible kernel bug with SMB

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I think I have encountered a kernel bug and would like help in investigating and (if appropriate) reporting it, as I have no experience in this area.

Since upgrading my Debian 12 workstation PCs to the linux-image-6.1.0-17-amd64 kernel package I am getting an error when I try to copy a file between two locations on mounted samba shares. The copy fails with the message Killed and the destination file is created as a zero bytes file. If I boot the workstations into the previous linux-image-6.1.0-16-amd64 kernel the problem does not occur. Here is a transcript of what happens (directories d1 and d2 are both located on a mounted SAMBA share):

Code:

$ ls -l d1/total 4-rwxrwx--- 1 andrew andrew 6 Jan  7 22:23 file1.txt*$ ls -l d2/total 0$ cp d1/file1.txt d2Killed$ ls -l d2/total 0-rwxrwx--- 1 andrew andrew 0 Jan  8 07:13 file1.txt*
An attempt to repeat the copy hangs. ps shows the cp command process is still running, and it cannot be killed, even with kill -9. If I then try to shut down the shutdown hangs for some time with a message something like Job session-2.scope/stop running, and then later in the shutdown it hangs again for a while with messages like systemd-shudown[1]: Waiting for process: 2156 (cp)

The shares are mounted via fstab with a line similar to that below:

Code:

//SOL/copying   /mnt/SOL/copying   cifs    credentials=/root/.smbcredentials,uid=andrew,gid=andrew,file_mode=0770,dir_mode=0770,x-systemd.automount,x-systemd.mount-timeout=240,x-systemd.idle-timeout=3600 0 0
I have reproduced this with a number of workstations running up-to-date Debian stable and two samba servers - one running a fully up-to-date Debian stable installation, the other a raspberry pi running Raspbian 10 which has not been updated for some time.

I would like to:
  1. Determine if this is a real bug or a problem with my setup
  2. Find out if this is a known bug or something I should report
  3. Learn how to investigate further if required
  4. Get some help and advice or how to report this, if necessary

Statistics: Posted by andy638 — 2024-01-08 07:45 — Replies 0 — Views 9



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