[frameworks-solid] [Bug 366720] New: stat() on faulty nfs mountpoints causes all KDE applications to deadlock (kill -9 required)

[Emmanuel Lepage Vallée via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=366720

Bug ID: 366720
Summary: stat() on faulty nfs mountpoints causes all KDE
applications to deadlock (kill -9 required)
Product: frameworks-solid
Version: 5.24.0
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: crash
Priority: NOR
Component: general
Assignee: ***@kde.org
Reporter: ***@gmail.com
CC: kdelibs-***@kde.org

Mounting NFS shares using the kernel module can cause hard (infinite) lock when
the network is unstable. This is because, by default, the file system is
configured to retry until things work. However, this cause in itself the
network to be flooded and make congestion worst.

This is well documented and isn't a KDE issue. However, this has to be taken
into account by KDE and it isn't. As KDEINIT5 can stat these mountpoint and
lock itself to oblivion, everything talking to KDEINIT also lock. So, in the
end, everything lock and killall -9 from ctrl+alt+f1 is required.

I think what trigger the lock is the open/save file dialog or dolphin sidebar
with the fs list.

To reproduce, mount an nfs (v3) share using the "mount -t nfs" command and
shutdown the server. This will also happen when copying big files over slow
wifi (TCP retry amplification problem).

[Andrew Crouthamel]

https://bugs.kde.org/show_bug.cgi?id=366720

Andrew Crouthamel <***@kdemail.net> changed:

What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |WAITINGFORINFO
Status|REPORTED |NEEDSINFO

--- Comment #1 from Andrew Crouthamel <***@kdemail.net> ---
Dear Bug Submitter,

This bug has been stagnant for a long time. Could you help us out and re-test
if the bug is valid in the latest version? I am setting the status to NEEDSINFO
pending your response, please change the Status back to REPORTED when you
respond.

Thank you for helping us make KDE software even better for everyone!

[Bug Janitor Service]

https://bugs.kde.org/show_bug.cgi?id=366720

--- Comment #2 from Bug Janitor Service <bug-***@kde.org> ---
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

[Bug Janitor Service]

https://bugs.kde.org/show_bug.cgi?id=366720

Bug Janitor Service <bug-***@kde.org> changed:

What |Removed |Added
----------------------------------------------------------------------------
Resolution|WAITINGFORINFO |WORKSFORME
Status|NEEDSINFO |RESOLVED

--- Comment #3 from Bug Janitor Service <bug-***@kde.org> ---
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!