[parisc-linux] Mount segfaults and stuff

[parisc-linux] Mount segfaults and stuff

[Jurij Smakov]

Hi!

I get segfaults from "mount", when I try to mount a non-existent
device, like

># mount /dev/fd0 /floppy
Segmentation fault

The failure is reported to be in strncmp in glibc, but it looks
like it is just trying to dereference a null pointer, passed
from somewhere else (trap 15 with zero IOR). If someone is 
experiencing similar behaviour, I can look further into it.

Also, I've tried looking at todo list to find something to work on...
It seems rather outdated and some tasks in it seem to be already
completed (like unaligned trap handler, etc.). So, where should
I direct my efforts? What is the part of parisc-linux project, which
needs immediate attention? ;-).

Cheers,

Jurij.

Re: [parisc-linux] Mount segfaults and stuff

[Thomas Marteau]

Jurij Smakov wrote:
> 
> Hi!
> 
> I get segfaults from "mount", when I try to mount a non-existent
> device, like
> 
> ># mount /dev/fd0 /floppy
> Segmentation fault

On my B132L, I have the same behaviour.
> 
> Also, I've tried looking at todo list to find something to work on...
> It seems rather outdated and some tasks in it seem to be already
> completed (like unaligned trap handler, etc.). So, where should
> I direct my efforts? What is the part of parisc-linux project, which
> needs immediate attention? ;-).
> 
I do not know what the developers want but I can say that driver
improvement could be good.
Anyway, if you want to find something to do, the best place to dig is
http://bugs.parisc-linux.org/ :)

Regards, Thomas.
ESIEE Team

Re: [parisc-linux] Mount segfaults and stuff

[Randolph Chung]

> Also, I've tried looking at todo list to find something to work on...
> It seems rather outdated and some tasks in it seem to be already
> completed (like unaligned trap handler, etc.). So, where should
> I direct my efforts? What is the part of parisc-linux project, which
> needs immediate attention? ;-).

http://bugs.parisc-linux.org/ has a list of outstanding bugs. the TODO
list items (and more) were moved over there some time ago.

randolph
-- 
   @..@                                         http://www.TauSq.org/
  (----)
 ( >__< )
 ^^ ~~ ^^

Re: [parisc-linux] Mount segfaults and stuff

[Grant Grundler]

Jurij Smakov wrote:
> What is the part of parisc-linux project, which
> needs immediate attention? ;-).

*sigh*. Lots of little stuff like floppy driver and hpux binary support.

The TODO list is stale intentionally.
We should be using http://bugs.parisc-linux.org.

grant

Re: [parisc-linux] Mount segfaults and stuff

[Jurij Smakov]

> *sigh*. Lots of little stuff like floppy driver and hpux binary support.
> 
> The TODO list is stale intentionally.
> We should be using http://bugs.parisc-linux.org.
> 
> grant

Hi!

The problem is that this bug list is also rather outdated. There are
two more or less recent bugs, others are more than 2 months old. Most
kernel bugs are filed against 2.4.0 kernel. I guess, a lot of things
changed since then. For example, mount bug, that I've mentioned before
just disappeared, once I recompiled it from source with latest CVS gcc.
Also, bug #135 (kernel panic on 712 doing two simultaneous compiles) - 
yesterday I've built the kernel with "make -j 2" without any problems
on a 712/80. Is it enough to close this bug? IMHO, the right strategy
in this situation would be to try and reproduce the bugs with latest
toolchain and drop the bugs, which do not have a recipe to reproduce them.

Anyway, what should I do with mount? Do I have to contact the package
maintainer? I can build the debs myself, but those will be unofficial.

Also, last night I had some weird problems with linux/net/core/netfilter.c
Sometimes its compilation fails, but I could not pinpoint the problem
so far. I'll play with it, but it would be nice to know, if anyone
else has/had any (negative) experiences with this file.

Best regards,

Jurij.

Re: [parisc-linux] Mount segfaults and stuff

[Grant Grundler]

Jurij Smakov wrote:
> Hi!
> 
> The problem is that this bug list is also rather outdated.

yeah - many of the bugs filed were placeholders for
issues we found but didn't want to track down at that time.

> There are
> two more or less recent bugs, others are more than 2 months old. Most
> kernel bugs are filed against 2.4.0 kernel. I guess, a lot of things
> changed since then. For example, mount bug, that I've mentioned before
> just disappeared, once I recompiled it from source with latest CVS gcc.

Well, sounds like that's something you could do - try to replicate bugs
and close them if they can't be replicated. I'll take another pass
at the list this week too.

> Also, bug #135 (kernel panic on 712 doing two simultaneous compiles) - 
> yesterday I've built the kernel with "make -j 2" without any problems
> on a 712/80. Is it enough to close this bug?

yes - I think so.  Getting confirmation from the submitter that the
bug is gone is good too.

>  IMHO, the right strategy
> in this situation would be to try and reproduce the bugs with latest
> toolchain and drop the bugs, which do not have a recipe to reproduce them.

Agreed.

> Anyway, what should I do with mount? Do I have to contact the package
> maintainer? I can build the debs myself, but those will be unofficial.

Preferably, if you can, find the bug and send the maintainer a patch.
Otherwise, file a bug on either bugs.debian.org or bugs.parisc-linux.org
depending on if it's reproducible on other arches or not.

> Also, last night I had some weird problems with linux/net/core/netfilter.c
> Sometimes its compilation fails, but I could not pinpoint the problem
> so far. I'll play with it, but it would be nice to know, if anyone
> else has/had any (negative) experiences with this file.

I'm having problems in general building a working kernel.
Neither my natively built 32-bit kernels for c3k nor x-compiled
64-bit kernels for A500 are booting right now...Last msg printed
to serial console is regarding setting PSW to 0 (or 1).
Just now enabled EARLY_DEBUG in pdc_cons.c.

hope this helps,
grant

Re: [parisc-linux] Mount segfaults and stuff

[Jurij Smakov]

Hi!

> Well, sounds like that's something you could do - try to replicate bugs
> and close them if they can't be replicated. I'll take another pass
> at the list this week too.

Ok, let's do that.

> Preferably, if you can, find the bug and send the maintainer a patch.
> Otherwise, file a bug on either bugs.debian.org or bugs.parisc-linux.org
> depending on if it's reproducible on other arches or not.

It turned out, that there is already newer hppa deb available on the
mirrors. Once I've installed it, the problem was gone. No worries :-).

Cheers,

Jurij.