[Pkg-samba-maint] Bug#935501: Bug#935501: cifs-utils: accessing cifs mounted share in qbittorrent causes kehelper 100% cpu after 10-15 mins of use.

[Mathieu Parent]

Control: reassign -1 src:linux 4.19.37-5
Control: affects -1 cifs-utils

Le ven. 23 août 2019 à 11:09, PB <pbone1970 at gmail.com> a écrit :
>
> Package: cifs-utils
> Version: 2:6.8-2
> Severity: important
>
> Dear Maintainer,

Hi,

>    * What led up to the situation?
> - cifs-utils: accessing cifs mounted share in qbittorrent causes kehelper 100%
> cpu after 10-15 mins of use.
> - watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [cifsd:1280] reported in
> syslog

This is a kernel bug then, reaffecting.

>    * What exactly did you do (or not do) that was effective (or
>      ineffective)?
> n/a. requires hard power off to shutdown.
>    * What was the outcome of this action?
> n/a
>    * What outcome did you expect instead?
> n/a
>
> This system was ugraded from Stretch release which was working fine with same
> hardware and usage pattern.

Please try with linux 4.19.37-5+deb10u2 from buster-proposed-updates.
It has a couple of cifs fixes.

Also, this commit in cifs is about lockup, and *may* be relevant:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/cifs?id=48f238a79f668f8ff013024d83010de551833d7f

Regards

Mathieu Parent


>
> -- System Information:
> Debian Release: 10.0
>   APT prefers stable-updates
>   APT policy: (500, 'stable-updates'), (500, 'stable')
> Architecture: amd64 (x86_64)
> Foreign Architectures: i386
>
> Kernel: Linux 4.19.0-5-amd64 (SMP w/4 CPU cores)
> Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
> Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE=en_AU:en (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> Init: systemd (via /run/systemd/system)
> LSM: AppArmor: enabled
>
> Versions of packages cifs-utils depends on:
> ii  libc6         2.28-10
> ii  libcap-ng0    0.7.9-2
> ii  libkeyutils1  1.6-6
> ii  libkrb5-3     1.17-3
> ii  libpam0g      1.3.1-5
> ii  libtalloc2    2.1.14-2
> ii  libwbclient0  2:4.9.5+dfsg-5
>
> cifs-utils recommends no packages.
>
> Versions of packages cifs-utils suggests:
> ii  keyutils   1.6-6
> pn  smbclient  <none>
> pn  winbind    <none>
>
> -- no debconf information