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From: Doug Nazar <nazard@nazar.ca>
To: "Kraus, Sebastian" <sebastian.kraus@tu-berlin.de>,
	"J. Bruce Fields" <bfields@fieldses.org>
Cc: "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
Subject: Re: Strange segmentation violations of rpc.gssd in Debian Buster
Date: Thu, 25 Jun 2020 17:44:14 -0400	[thread overview]
Message-ID: <1527b158-3404-168c-8908-de4b8a709ccd@nazar.ca> (raw)
In-Reply-To: <406fe972135846dc8a23b60be59b0590@tu-berlin.de>

On 2020-06-25 13:43, Kraus, Sebastian wrote:
> [Current thread is 1 (Thread 0x7fb2eaeba700 (LWP 14174))]
> (gdb) bt
> #0  0x000056233fff038e in ?? ()
> #1  0x000056233fff09f8 in ?? ()
> #2  0x000056233fff0b92 in ?? ()
> #3  0x000056233fff13b3 in ?? ()
> #4  0x00007fb2eb8dbfa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
> #5  0x00007fb2eb80c4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
> (gdb) quit
>
>
> I am not an expert in analyzing stack and backtraces. Is there anything meaningful, you are able to extract from the trace?
> As far as I see, thread 14174 caused the segmentation violation just after its birth on clone.
> Please correct me, if I am in error.
> Seems Debian Buster does not ship any dedicated package with debug symbols for the rpc.gssd executable.
> So far, I was not able to find such a package.
> What's your opinon about the trace?

You'll need to install the debug symbols for your distribution/package. 
A quick google links to https://wiki.debian.org/HowToGetABacktrace. 
Those ?? lines should then be replaced with function, file & line numbers.

I've been following this with interest since it used to happen to me a 
lot. It hasn't recently, even though every so often I spend a few hours 
trying to re-create it to try debug it.

Doug


  parent reply	other threads:[~2020-06-25 22:11 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-19 21:24 RPC Pipefs: Frequent parsing errors in client database Kraus, Sebastian
2020-06-19 22:04 ` J. Bruce Fields
2020-06-20 11:35   ` Kraus, Sebastian
2020-06-20 17:03     ` J. Bruce Fields
2020-06-20 21:08       ` Kraus, Sebastian
2020-06-22 22:36         ` J. Bruce Fields
2020-06-25 17:43           ` Strange segmentation violations of rpc.gssd in Debian Buster Kraus, Sebastian
2020-06-25 20:14             ` J. Bruce Fields
2020-06-25 21:44             ` Doug Nazar [this message]
2020-06-26 12:31               ` Kraus, Sebastian
2020-06-26 17:23                 ` Doug Nazar
2020-06-26 19:46                   ` J. Bruce Fields
2020-06-26 20:15                     ` Doug Nazar
2020-06-26 21:02                       ` J. Bruce Fields
2020-06-26 21:30                         ` [PATCH v2] " Doug Nazar
2020-06-26 21:44                           ` J. Bruce Fields
2020-06-29  5:39                           ` Kraus, Sebastian
2020-06-29 14:09                             ` Doug Nazar
2020-07-01  7:39                               ` Kraus, Sebastian
2020-07-01  8:13                                 ` [PATCH v2] " Peter Eriksson
2020-07-01 18:45                                 ` [PATCH v2] " Doug Nazar

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