maindavfs2 - Support: sr #110136, Segmentation fault on umount


sr #110136: Segmentation fault on umount

Submitter:  None
Submitted:  Tue 26 Nov 2019 07:33:30 AM UTC
Category:  None Priority:  5 - Normal
Severity:  3 - Normal Status:  Done
Privacy:  Public Assigned to:  _71007
Originator Email:  -email is unavailable- Open/Closed:  Open
Operating System:  GNU/Linux
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Wed 27 Nov 2019 05:44:56 PM UTC, comment #2: 

many thanks

Wed 27 Nov 2019 05:29:00 PM UTC, comment #1: 

This is a known bug fixed in the CVS sources (, but there is no bugfix release yet.

Until a new release is available for your distribution you may work around this bug:

Instead of unmounting with "umount <mountpoint>" use command "umount -i <mountpoint>". With option "-i" the umount helper umount.davfs is not called (and can't segfault). But now umount might return when mount.davfs is still running. If you created or edited files you should check whether mount.davfs already terminated ("ps ax") before shutting down your system.


- <_71007>
Tue 26 Nov 2019 07:33:30 AM UTC, original submission:  

When I umount my mounted davfs volume I get a segmentation fault on kubuntu 19.10 with davfs2 version 1.5.5.
The core dump is attached.

The syslog output is:

Nov 26 08:17:21 buero kernel: [79748.450702] umount.davfs[24201]: segfault at 46fa9a00 ip 00007fb847876d8a sp 00007fff1cbde0 a8 error 4 in[7fb8477e7000+178000] Nov 26 08:17:21 buero kernel: [79748.450711] Code: f3 0f 1e fa 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 8 9 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 66 <f3> 0f 6f 20 66 0f 74 e0 66 0f d7 d4 85 d2 74 04 0f bc c2 c3 48 83

I hope you can help me with this issue.



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Attach Files:

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file #47931:  core added by None (1MiB - application/octet-stream - Core Dump)


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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-11-27 _71007 StatusNone Done
        Assigned toNone _71007
    2019-11-26 None Attached File- Added core, #47931

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