[Mldonkey-bugs] [bug #24456] Segfault when max_upload_slots set to 3

[José Manuel]

URL:
  <http://savannah.nongnu.org/bugs/?24456>

                 Summary: Segfault when max_upload_slots set to 3
                 Project: mldonkey, a multi-networks file-sharing client
            Submitted by: morgul
            Submitted on: Sun Oct  5 13:41:37 2008
                Category: None
                Severity: 3 - Normal
              Item Group: Segmentation Fault
                  Status: None
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 2.9.5
                 Release: 2.9.5
        Operating System: Linux
         Binaries Origin: Gentoo ebuild
                CPU type: x86_64

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Details:

Hi, I've been using MLNet for a long time (different versions of it). But
since I updated it to version 2.9.5, it kept crashing with a segmentation
fault after a few seconds of running the mlnet executable from console. I
tried a lot of times on different days, but always the same result:
segmentation fault, and mlnet died.

I tried recompiling/installing (I have a Gentoo Linux OS) mldonkey, lablgtk
and ocaml. But no luck, same result every time.

Yesterday, I thought about renaming my .mldonkey configuration directory and
starting mlnet with the default config it takes from scratch. I launched
mlnet, and this time it worked!

So I started changing the configuration values to enter the ones I had
before. And, very soon, I guess I found the trouble making cause. All values
where changing fine, but when I changed the value max_upload_slots from its
default 5 to 3 (the value I had before), it didn't even gave me the
confirmation message on my web browser... the web interface stopped working.
And in the console I saw mlnet died with a segmentation fault.

I tried doing that a few times more, with same results: when you change
max_upload_slots to 3, mlnet segfaults (IIRC, that happens before mlnet saves
that config option, so next time you run mlnet it works, but because it still
have the default 5 value). I also checked that with that value on the config
file, mlnet fails with a segmentation fault after a few seconds.

So I removed the new (stock) configuration directory, and the renamed again
the old one to the original .mldonkey name, without changing anything from it.
I tried running mlnet... segmentation fault as always, after a few seconds.
Then I changed by hand the max_upload_slots configuration value on
.mldonkey/downloads.ini to the default 5 value. I tried again to start mlnet,
and it worked!, and has been running and working fine for about 12 hours now
:D

My system is a PC with an AMD64 3200+ processor, running a 64/32 bits Gentoo
system (though all of mlnet and its dependencies are 64 bits on my system).
Version of mlnet and some (maybe) related packages I have installed:

- dev-lang/ocaml-3.10.2
- dev-ml/lablgl-1.03-r1
- sys-devel/gcc-4.1.2
- sys-libs/glibc-2.6.1
- dev-ml/lablgtk-2.10.1
- net-p2p/mldonkey-2.9.5

If you need any more information, just ask ;)

By the way, I want this fixed, because with my low upload speed (my Internet
connection is asymmetric 4Mbits download, 128Kbits upload), with the default 5
upload slots, people need lots of patience to download from me :D The previous
3 value I had is what worked for me the best before 2.9.5.




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