Re: Failure to access cifs mount of samba share after resume from sleep with 5.17-rc5

[Thorsten Leemhuis <regressions@leemhuis.info>]

[TLDR: I'm adding the regression report below to regzbot, the Linux
kernel regression tracking bot; all text you find below is compiled from
a few templates paragraphs you might have encountered already already
from similar mails.]

Hi, this is your Linux kernel regression tracker. Top-posting for once,
to make this easily accessible to everyone.

CCing the regression mailing list, as it should be in the loop for all
regressions, as explained here:
https://www.kernel.org/doc/html/latest/admin-guide/reporting-issues.html

To be sure below issue doesn't fall through the cracks unnoticed, I'm
adding it to regzbot, my Linux kernel regression tracking bot:

#regzbot ^introduced v5.16.11..v5.17-rc5
#regzbot title cifs: Failure to access cifs mount of samba share after
resume from sleep
#regzbot ignore-activity

Reminder for developers: when fixing the issue, please add a 'Link:'
tags pointing to the report (the mail quoted above) using
lore.kernel.org/r/, as explained in
'Documentation/process/submitting-patches.rst' and
'Documentation/process/5.Posting.rst'. This allows the bot to connect
the report with any patches posted or committed to fix the issue; this
again allows the bot to show the current status of regressions and
automatically resolve the issue when the fix hits the right tree.

I'm sending this to everyone that got the initial report, to make them
aware of the tracking. I also hope that messages like this motivate
people to directly get at least the regression mailing list and ideally
even regzbot involved when dealing with regressions, as messages like
this wouldn't be needed then. And don't worry, if I need to send other
mails regarding this regression only relevant for regzbot I'll send them
to the regressions lists only (with a tag in the subject so people can
filter them away). With a bit of luck no such messages will be needed
anyway.

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I'm getting a lot of
reports on my table. I can only look briefly into most of them and lack
knowledge about most of the areas they concern. I thus unfortunately
will sometimes get things wrong or miss something important. I hope
that's not the case here; if you think it is, don't hesitate to tell me
in a public reply, it's in everyone's interest to set the public record
straight.


On 27.02.22 03:36, Satadru Pramanik wrote:
> I'm on a x86_64 ubuntu 22.04 system accessing a similar system running
> samba Version 4.13.14-Ubuntu. Both systems are on ubuntu mainline
> kernel 5.17-rc5.
> 
> I have a samba share mounted from my fstab, and file access works fine.
> Upon suspending my system and resuming though, the mounted samba share
> is inaccessible, and my dmesg has many "CIFS: VFS: cifs_tree_connect:
> could not find superblock: -22" messages.
> 
> Unmounting and remounting the share restores access.
> 
> When I boot into kernel 5.16.11, I do not have this issue. The cifs
> share is accessible just fine after a suspend/resume cycle.
> 
> I assume this is a regression with 5.17? Is there any information
> worth providing which might help debug and fix this issue?
> 
> Regards,
> 
> Satadru Pramanik

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