[Bug 1574270] Re: applications segfault systematically with tsocks

[Sébastien Dinot]

I can confirm this, it works for me!

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Markus Lindberg]

This seems to be fixed now. I can use tsocks (1.8beta5-9.3) without it
seg faulting.

Can anyone else confirm this?

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Chris Samuel]

Just confirming that this patch once again lets me again use tsocks
successfully!

Thanks so much for this work.

Now if only the Ubuntu folks were listening..

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[wiz]

Btw, the fix is still not in yakkety. Who can we grill to speed up the
process?

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Martin von Wittich]

I just stumbled over this bug again. What do we have to do so that the
patch gets included in the official package...?

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Karl McMurdo]

** Description changed:

- 
  On Xenial, when an application is used through tsocks, it will
  systematically segfqult:
  
- $ ssh machine
- [connection OK]
- $ wget http://example.com/some/path
- [download succeeds]
- $ tsocks ssh machine
- Segmentation fault
- $ tsocks wget http://example.com/some/path
- Segmentation fault
+ $ ssh machine
+ [connection OK]
+ $ wget http://example.com/some/path
+ [download succeeds]
+ $ tsocks ssh machine
+ Segmentation fault
+ $ tsocks wget http://example.com/some/path
+ Segmentation fault
  
- $ lsb_release -rd
- Description: Ubuntu 16.04 LTS
- Release: 16.04
+ $ lsb_release -rd
+ Description: Ubuntu 16.04 LTS
+ Release: 16.04
  
- $ apt-cache policy tsocks
- tsocks:
-   Installed: 1.8beta5-9.3
-   Candidate: 1.8beta5-9.3
-   Version table:
-  *** 1.8beta5-9.3 500
- 500 http://fr.archive.ubuntu.com/ubuntu xenial/universe amd64 
Packages
- 100 /var/lib/dpkg/status
+ $ apt-cache policy tsocks
+ tsocks:
+   Installed: 1.8beta5-9.3
+   Candidate: 1.8beta5-9.3
+   Version table:
+  *** 1.8beta5-9.3 500
+ 500 http://fr.archive.ubuntu.com/ubuntu xenial/universe amd64 
Packages
+ 100 /var/lib/dpkg/status
  
  Expected: connections through tsocks succeed
  
  What happens: connections through tsocks systematically segfault
  
  Here's my tsocks.conf:
  
- $ cat /etc/tsocks.conf
- local = 192.168.0.0/255.255.0.0
- server = 127.0.0.1
- server_port = 8083
- server_type = 5
+ $ cat /etc/tsocks.conf
+ local = 192.168.0.0/255.255.0.0
+ server = 127.0.0.1
+ server_port = 8083
+ server_type = 5
  
  Running through gdb:
  
- $ gdb ssh machine
- [...]
- (gdb) run
- Starting program: /usr/bin/ssh
- [Thread debugging using libthread_db enabled]
- Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
+ $ gdb ssh machine
+ [...]
+ (gdb) run
+ Starting program: /usr/bin/ssh
+ [Thread debugging using libthread_db enabled]
+ Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
  
- Program received signal SIGSEGV, Segmentation fault.
- 0x in ?? ()
- (gdb) bt
- #0 0x in ?? ()
- #1 0x77670e77 in poll (__timeout=10, __nfds=1, 
__fds=0x7fffdb70)
- at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
- #2 RAND_poll () at rand_unix.c:325
- #3 0x7766fbd5 in ssleay_rand_bytes (buf=0x55804010 
"\212\003", num=num@entry=60,
- pseudo=pseudo@entry=0, lock=lock@entry=0) at md_rand.c:398
- #4 0x77670603 in drbg_get_entropy (ctx=, 
pout=0x7fffdec0,
- entropy=, min_len=60, max_len=) at 
rand_lib.c:199
- #5 0x776e6278 in fips_get_entropy (dctx=dctx@entry=0x779a9960 
,
- pout=pout@entry=0x7fffdf30, entropy=, 
min_len=,
- max_len=2147483632) at fips_drbg_lib.c:151
- #6 0x776e6904 in FIPS_drbg_instantiate 
(dctx=dctx@entry=0x779a9960 ,
- pers=pers@entry=0x7fffdf80 "OpenSSL DRBG2.0", 
perslen=perslen@entry=32)
- at fips_drbg_lib.c:223
- #7 0x77670993 in RAND_init_fips () at rand_lib.c:302
- #8 0x775b3f7a in OPENSSL_init_library () at o_init.c:119
- #9 0x77de74ea in call_init (l=, argc=argc@entry=1,
- argv=argv@entry=0x7fffe078, env=env@entry=0x7fffe088) at 
dl-init.c:72
- #10 0x77de75fb in call_init (env=0x7fffe088, 
argv=0x7fffe078, argc=1,
- l=) at dl-init.c:30
- #11 _dl_init (main_map=0x77ffe168, argc=1, argv=0x7fffe078, 
env=0x7fffe088)
- at dl-init.c:120
- #12 0x77dd7cfa in _dl_start_user () from 
/lib64/ld-linux-x86-64.so.2
- #13 0x0001 in ?? ()
- #14 0x7fffe4da in ?? ()
- #15 0x in ?? ()
+ Program received signal SIGSEGV, Segmentation fault.
+ 0x in ?? ()
+ (gdb) bt
+ #0 0x in ?? ()
+ #1 0x77670e77 in poll (__timeout=10, __nfds=1, 
__fds=0x7fffdb70)
+ at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
+ #2 RAND_poll () at rand_unix.c:325
+ #3 0x7766fbd5 in ssleay_rand_bytes (buf=0x55804010 
"\212\003", num=num@entry=60,
+ pseudo=pseudo@entry=0, lock=lock@entry=0) at md_rand.c:398
+ #4 0x77670603 in drbg_get_entropy (ctx=, 
pout=0x7fffdec0,
+ entropy=, min_len=60, max_len=) at 
rand_lib.c:199
+ #5 0x776e6278 in fips_get_entropy (dctx=dctx@entry=0x779a9960 
,
+ pout=pout@entry=0x7fffdf30, entropy=, 
min_len=,
+ max_len=2147483632) at fips_drbg_lib.c:151
+ #6 0x776e6904 in FIPS_drbg_instantiate 
(dctx=dctx@entry=0x779a9960 ,
+ pers=pers@entry=0x7fffdf80 "OpenSSL 

[Bug 1574270] Re: applications segfault systematically with tsocks

[Johan Ramm-Ericson]

Additional confirmation; the patch works for me as well - thanks all!

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Markus Lindberg]

@GospoGied (gospogied)
Thanks, that did it.

Best regards
Markus Lindberg
IT Helpdesk

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[GospoGied]

@Markus Lindberg (k-markus)
There is one more step required in #15, which is edit file debian/patches/00list

$ sudo apt-get build-dep tsocks
[--snip--]
$ apt-get source tsocks
[--snip--]
$ cp 07_always_init_function_pointers.dpatch tsocks-1.8beta5/debian/patches/
$ echo -e "\n07_always_init_function_pointers.dpatch" >> 
tsocks-1.8beta5/debian/patches/00list
$ cd tsocks-1.8beta5/
$ dpkg-buildpackage -us -uc
[--snip--]
$ sudo apt-get purge tsocks
$ sudo dpkg --install ../tsocks_1.8beta5-9.3_amd64.deb

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

All,

Thanks to the testers; thanks to the up-voters! It feels good not to be
alone! ;-)

However, I'm not sure what to do with this bug report now...

The maintainer is in Cc, the Ubuntu Review Team is in Cc, the last
uploader is in Cc. Yet, no reply so far.

I know the tsocks code base is, to say the least, not the best I had to
deal with; yet the reasons are pretty well explained and the patch
itself pretty simple. It's a wonder the bug did not get exposed until
only recently; it's been latent for all those years.

I *am* ready to rework the patch if it is deemed to be not correct, but
I can't do that without feedback. Heck, I would even consider
volunteering to handle this package for the foreseable future if that
would help (but I am not used to packaging; I'd need directions quite
often).

Quid?

Regards,
Yann E. MORIN.

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

Markus, All,

Weird that it did not work for you. I retested it just right now, and it
worked for me.

Note however that I did a mistake when typing the command in the report:
dpkg-buildpacakge is misspelled, it should be dpkg-buildpackage.

Regards,
Yann E. MORIN.

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Markus Lindberg]

I can confirm that the patch do in fact resolve the segmentation fault
issue. But I were only able to patch it using the method described in
comment #14. The method described in comment #15 doesn't seem to have
any affect.

Best regards,
Markus Lindberg

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

Dear Tamas,
Dear Ubuntu Review Team,

It's been more than a month that I have posted a proposal to
fix this bug. In the meantime, I have tested this extensively
(as *everything* gets out of my machine via tsocks) and I have
had no issue at all. with the proposed patch.

Can we at least get a status on this bug, even it is just a
"won't fix" or "don't care" or whatever, please? ;-)

Thanks!

Regards,
Yann E. MORIN

PS. Adding Logan, as I see he pushed an update for yakkety not
so long ago...

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Martin von Wittich]

Patch works for me too. Would be nice if this could make it to the
official repository.

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

** Attachment added: "Be sure to always intialise function pointers v2"
   
https://bugs.launchpad.net/ubuntu/+source/tsocks/+bug/1574270/+attachment/4655719/+files/07_always_init_function_pointers.dpatch

** Patch removed: "Be sure to always intialise function pointers"
   
https://bugs.launchpad.net/ubuntu/+source/tsocks/+bug/1574270/+attachment/4653856/+files/07_init.dpatch

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

Brendan,

That's because the attached patch expects the bundled patches are
already applied.

Here's how I did (as non-root):

$ sudo apt-get build-dep tsocks
[--snip--]
$ apt-get source tsocks
[--snip--]
$ cp 07_init.dpatch tsocks-1.8beta5/debian/patches/
$ cd tsocks-1.8beta5/
$ dpkg-buildpacakge -us -uc
[--snip--]
$ cd ..
$ sudo apt-get purge tsocks
$ sudo dpkg --install tsocks_1.8beta5-9.3_amd64.deb

Also, to avoid tsocks being re-installed from the repository every time
I run "make dist-upgrade", I simply uninstalled it before installing my
locally-built tsocks (hence the "apt-get purge tsocks in the commands
above).

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

Oh, by the way, I just noticed that the description in the patch itself
is wrong. I just copy-pasted the one from an existing patch to get the
layout, but forgot to edit it afterward. I'll post an upated version of
the patch shortly...

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Brendan]

Just patched and ran in my environment. It works, but one of the patch
hunks failed:

lost@lost-cynic:~/tsocks$ sudo apt-get source tsocks
Reading package lists... Done
Need to get 87.0 kB of source archives.
Get:1 http://us.archive.ubuntu.com/ubuntu xenial/universe tsocks 1.8beta5-9.3 
(dsc) [1,455 B]
Get:2 http://us.archive.ubuntu.com/ubuntu xenial/universe tsocks 1.8beta5-9.3 
(tar) [85.5 kB]
Fetched 87.0 kB in 0s (276 kB/s) 
dpkg-source: info: extracting tsocks in tsocks-1.8beta5
dpkg-source: info: unpacking tsocks_1.8beta5-9.3.tar.gz
W: Can't drop privileges for downloading as file 'tsocks_1.8beta5-9.3.dsc' 
couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
lost@lost-cynic:~/tsocks/tsocks-1.8beta5$ sudo ./07_init.dpatch -patch
patching file tsocks.c
Hunk #1 succeeded at 69 (offset -1 lines).
Hunk #2 succeeded at 102 (offset -2 lines).
Hunk #3 succeeded at 207 (offset -4 lines).
Hunk #4 succeeded at 359 with fuzz 1 (offset -13 lines).
Hunk #5 succeeded at 543 (offset -15 lines).
Hunk #6 succeeded at 699 (offset -15 lines).
Hunk #7 FAILED at 756.
Hunk #8 succeeded at 1181 (offset -63 lines).
1 out of 8 hunks FAILED -- saving rejects to file tsocks.c.rej

Contents of tsocks.c.rej:
lost@lost-cynic:~/tsocks/tsocks-1.8beta5$ cat tsocks.c.rej 
--- tsocks-orig.c   2016-05-02 21:07:58.804224930 +0200
+++ tsocks.c2016-05-02 21:13:00.399657192 +0200
@@ -756,6 +773,8 @@
struct connreq *conn;
int rc;
 
+   tsocks_init();
+
 if (realgetpeername == NULL) {
 show_msg(MSGERR, "Unresolved symbol: getpeername\n");
 return(-1);


lost@lost-cynic:~/tsocks/tsocks-1.8beta5$ sudo apt-get build-dep tsocks
Reading package lists... Done
Reading package lists... Done
Building dependency tree   
Reading state information... Done
The following NEW packages will be installed:
  debhelper dh-strip-nondeterminism libfile-stripnondeterminism-perl po-debconf
0 upgraded, 4 newly installed, 0 to remove and 1 not upgraded.
Need to get 988 kB of archives.
After this operation, 1,823 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 po-debconf all 
1.0.19 [234 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 
libfile-stripnondeterminism-perl all 0.015-1 [10.3 kB]
Get:3 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 
dh-strip-nondeterminism all 0.015-1 [4,864 B]
Get:4 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 debhelper all 
9.20160115ubuntu3 [739 kB]
Fetched 988 kB in 0s (1,444 kB/s)  
Selecting previously unselected package po-debconf.
(Reading database ... 299037 files and directories currently installed.)
Preparing to unpack .../po-debconf_1.0.19_all.deb ...
Unpacking po-debconf (1.0.19) ...
Selecting previously unselected package libfile-stripnondeterminism-perl.
Preparing to unpack .../libfile-stripnondeterminism-perl_0.015-1_all.deb ...
Unpacking libfile-stripnondeterminism-perl (0.015-1) ...
Selecting previously unselected package dh-strip-nondeterminism.
Preparing to unpack .../dh-strip-nondeterminism_0.015-1_all.deb ...
Unpacking dh-strip-nondeterminism (0.015-1) ...
Selecting previously unselected package debhelper.
Preparing to unpack .../debhelper_9.20160115ubuntu3_all.deb ...
Unpacking debhelper (9.20160115ubuntu3) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for doc-base (0.10.7) ...
Processing 1 added doc-base file...
Setting up po-debconf (1.0.19) ...
Setting up libfile-stripnondeterminism-perl (0.015-1) ...
Setting up dh-strip-nondeterminism (0.015-1) ...
Setting up debhelper (9.20160115ubuntu3) ...
lost@lost-cynic:~/tsocks/tsocks-1.8beta5$ sudo debuild -us -uc -b
 dpkg-buildpackage -rfakeroot -D -us -uc -b
dpkg-buildpackage: warning: using a gain-root-command while being root
dpkg-buildpackage: source package tsocks
dpkg-buildpackage: source version 1.8beta5-9.3ubuntu1
dpkg-buildpackage: source distribution UNRELEASED
dpkg-buildpackage: source changed by root 
 dpkg-source --before-build tsocks-1.8beta5
dpkg-buildpackage: host architecture amd64
 fakeroot debian/rules clean
dpatch  deapply-all  
06_fallback not applied to ./ .
05_config_in_home not applied to ./ .
04_getpeername not applied to ./ .
03_fixloop not applied to ./ .
02_hyphenfix not applied to ./ .
01_symbolexport not applied to ./ .
rm -rf patch-stamp patch-stampT debian/patched
dh_testdir
dh_testroot
rm -f build-stamp install-stamp config.status config.guess
[ ! -f Makefile ] || /usr/bin/make distclean
rm -f `find . -name "*~"`
rm -rf debian/tsocks debian/files* core debian/*substvars
#-rm -rf debian/plus/tsocks.8*
#-rm -rf debian/conffiles
dh_clean
rm -f debian/debhelper-build-stamp
rm -f debian/tsocks.substvars
rm -f debian/tsocks.*.debhelper
rm -rf debian/tsocks/
rm -rf debian/.debhelper/
rm -f debian/*.debhelper.log
rm -f debian/files
find .  \( \( \

[Bug 1574270] Re: applications segfault systematically with tsocks

[Mario Limonciello]

Yeah, just tried with it on my local case.  Works properly for me!

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Mario Limonciello]

Yann.  Ah didn't realize upstream was so dead.  Yes, i'll give it a shot for my 
cases then. 
Thanks!

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Brendan]

I'll try this patch in the morning

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Title:
  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

Mario,

The "official" upstream tsocks has not done any release since October
2002, that is almost 14 years ago. Besides, there does nto seem to be
any publicly available repository of any kind (no svn, no cvs or
anything that was current at the time).

I'm not sure it makes sense to send a patch to a dead project.

If we were to consider Debian as the new upstream, I can't really report
a bug there, as I don't use Debian so can't check if the bug also
applies to them...

However, the maintainer for this package in Ubuntu is also the
maintainer for the same package in Debian. So, hopefully, he'd notice
this bug! ;-)

(Cc-ing Tamas now, so he does notice it.)

In the meantime, it would be nice if you could also test on your side
with your use-cases, so as to get a bit more confidence in the patch
(which I only tested in my own use-case, and only lightly tested at
that...).

Cheers!

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Title:
  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

** Bug watch removed: Debian Bug tracker #576301
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=576301

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Title:
  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Ubuntu Foundations Team Bug Bot]

The attachment "Be sure to always intialise function pointers" seems to
be a patch.  If it isn't, please remove the "patch" flag from the
attachment, remove the "patch" tag, and if you are a member of the
~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]

** Tags added: patch

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Title:
  applications segfault systematically with tsocks

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Re: [Bug 1574270] Re: applications segfault systematically with tsocks

[Mario Limonciello]

Great news thanks! Would you mind submitting upstream as well?

On Mon, May 2, 2016, 15:05 Yann E. MORIN 
wrote:

> I managed to make it work with the attached patch.
>
> This is probably not a correct patch, but it at least makes it work, and
> can serve as a base for a correct patch.
>
> In the end, it happens that some libraries (like openssl) are
> initialised before those in LD_PRELOAD (which is really weird as ld.so
> does not document this behaviour). So, tsocks not being initialised, the
> wrapper functions were calling functions via un-initialised function
> pointers.
>
> ** Attachment added: "Be sure to always intialise function pointers"
>
> https://bugs.launchpad.net/ubuntu/+source/tsocks/+bug/1574270/+attachment/4653856/+files/07_init.dpatch
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1574270
>
> Title:
>   applications segfault systematically with tsocks
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/tsocks/+bug/1574270/+subscriptions
>

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

I managed to make it work with the attached patch.

This is probably not a correct patch, but it at least makes it work, and
can serve as a base for a correct patch.

In the end, it happens that some libraries (like openssl) are
initialised before those in LD_PRELOAD (which is really weird as ld.so
does not document this behaviour). So, tsocks not being initialised, the
wrapper functions were calling functions via un-initialised function
pointers.

** Attachment added: "Be sure to always intialise function pointers"
   
https://bugs.launchpad.net/ubuntu/+source/tsocks/+bug/1574270/+attachment/4653856/+files/07_init.dpatch

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Title:
  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

After a bit more investigation, I hacked tsocks to spit out debug log in
its _init() function:

FILE *f = fopen( "/home/me/tsocks.msg", "a+" );
fprintf( "[%s] Hello world\n", program_invocation_name );
fclose( f );

However, when running:

$ tsocks ssh machine
Segmentation fault

The .msg file is *not* created at all!

So, it seems something is trying to initialise openSSL before calling
the _init() from tsocks...

So, I tried with another program *not* linked with openSSL. I used curl,
which is linked with GnuTLS:

$ curl https://example.com/
[works!]

Conclusion: openSSL does get initialised before tsocks. That's really weird, as 
tsocks is in LD_PRELOAD,
so should come before any shared library from a NEEDED tag.

/me is now investigating the linker documentation to understand what's
goign on...

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[eexpress]

I just install tsocks, find this same problem. I remenber it works
before.

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

After testing, it appears that neither patch fix the issue. There still
are segfaults...

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Title:
  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

There is a (vey old!) related bug in the Debian bug tracker:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=576301

There are two patches floating in that bug report, but they were
never made part of any tsocks relase:

https://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;att=1;filename=tsocks_fixpoll.patch;bug=576301

https://bugs.debian.org/cgi-bin/bugreport.cgi?filename=fix_poll.patch;att=1;bug=576301;msg=15

However, of the two patches, it is not obvious which is the correct
solution; besides, they touch the exact same part of the code...
I'll try to test each and will report back (soonish...)

** Bug watch added: Debian Bug tracker #576301
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=576301

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Title:
  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Yann E. MORIN]

Varga,

Please don't replace the description.
Add a comment if you need to.
Thanks. ;-)

** Description changed:

- i have a same problem with tsocks and ssh.
+ 
+ On Xenial, when an application is used through tsocks, it will
+ systematically segfqult:
+ 
+ $ ssh machine
+ [connection OK]
+ $ wget http://example.com/some/path
+ [download succeeds]
+ $ tsocks ssh machine
+ Segmentation fault
+ $ tsocks wget http://example.com/some/path
+ Segmentation fault
+ 
+ $ lsb_release -rd
+ Description: Ubuntu 16.04 LTS
+ Release: 16.04
+ 
+ $ apt-cache policy tsocks
+ tsocks:
+   Installed: 1.8beta5-9.3
+   Candidate: 1.8beta5-9.3
+   Version table:
+  *** 1.8beta5-9.3 500
+ 500 http://fr.archive.ubuntu.com/ubuntu xenial/universe amd64 
Packages
+ 100 /var/lib/dpkg/status
+ 
+ Expected: connections through tsocks succeed
+ 
+ What happens: connections through tsocks systematically segfault
+ 
+ Here's my tsocks.conf:
+ 
+ $ cat /etc/tsocks.conf
+ local = 192.168.0.0/255.255.0.0
+ server = 127.0.0.1
+ server_port = 8083
+ server_type = 5
+ 
+ Running through gdb:
+ 
+ $ gdb ssh machine
+ [...]
+ (gdb) run
+ Starting program: /usr/bin/ssh
+ [Thread debugging using libthread_db enabled]
+ Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
+ 
+ Program received signal SIGSEGV, Segmentation fault.
+ 0x in ?? ()
+ (gdb) bt
+ #0 0x in ?? ()
+ #1 0x77670e77 in poll (__timeout=10, __nfds=1, 
__fds=0x7fffdb70)
+ at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
+ #2 RAND_poll () at rand_unix.c:325
+ #3 0x7766fbd5 in ssleay_rand_bytes (buf=0x55804010 
"\212\003", num=num@entry=60,
+ pseudo=pseudo@entry=0, lock=lock@entry=0) at md_rand.c:398
+ #4 0x77670603 in drbg_get_entropy (ctx=, 
pout=0x7fffdec0,
+ entropy=, min_len=60, max_len=) at 
rand_lib.c:199
+ #5 0x776e6278 in fips_get_entropy (dctx=dctx@entry=0x779a9960 
,
+ pout=pout@entry=0x7fffdf30, entropy=, 
min_len=,
+ max_len=2147483632) at fips_drbg_lib.c:151
+ #6 0x776e6904 in FIPS_drbg_instantiate 
(dctx=dctx@entry=0x779a9960 ,
+ pers=pers@entry=0x7fffdf80 "OpenSSL DRBG2.0", 
perslen=perslen@entry=32)
+ at fips_drbg_lib.c:223
+ #7 0x77670993 in RAND_init_fips () at rand_lib.c:302
+ #8 0x775b3f7a in OPENSSL_init_library () at o_init.c:119
+ #9 0x77de74ea in call_init (l=, argc=argc@entry=1,
+ argv=argv@entry=0x7fffe078, env=env@entry=0x7fffe088) at 
dl-init.c:72
+ #10 0x77de75fb in call_init (env=0x7fffe088, 
argv=0x7fffe078, argc=1,
+ l=) at dl-init.c:30
+ #11 _dl_init (main_map=0x77ffe168, argc=1, argv=0x7fffe078, 
env=0x7fffe088)
+ at dl-init.c:120
+ #12 0x77dd7cfa in _dl_start_user () from 
/lib64/ld-linux-x86-64.so.2
+ #13 0x0001 in ?? ()
+ #14 0x7fffe4da in ?? ()
+ #15 0x in ?? ()
+ 
+ Since Xenial does not have debugging symbols for tsocks, I can't provide much 
more (although
+ I'd gladly follow a quick and simple tutorial on doing so).
+ 
+ For the record, it was working in Wily (15.10) and all previous
+ versions.

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  applications segfault systematically with tsocks

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: tsocks (Ubuntu)
   Status: New => Confirmed

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[Bug 1574270] Re: applications segfault systematically with tsocks

[Varga Csaba]

** Description changed:

- On Xenial, when an application is used through tsocks, it will
- systematically segfqult:
- 
- $ ssh machine
- [connection OK]
- $ wget http://example.com/some/path
- [download succeeds]
- $ tsocks ssh machine
- Segmentation fault
- $ tsocks wget http://example.com/some/path
- Segmentation fault
- 
- $ lsb_release -rd
- Description:  Ubuntu 16.04 LTS
- Release:  16.04
- 
- $ apt-cache policy tsocks
- tsocks:
-   Installed: 1.8beta5-9.3
-   Candidate: 1.8beta5-9.3
-   Version table:
-  *** 1.8beta5-9.3 500
- 500 http://fr.archive.ubuntu.com/ubuntu xenial/universe amd64 
Packages
- 100 /var/lib/dpkg/status
- 
- Expected: connections through tsocks succeed
- 
- What happens: connections through tsocks systematically segfault
- 
- Here's my tsocks.conf:
- 
- $ cat /etc/tsocks.conf
- local = 192.168.0.0/255.255.0.0
- server = 127.0.0.1
- server_port = 8083
- server_type = 5
- 
- Running through gdb:
- 
- $ gdb ssh machine
- [...]
- (gdb) run
- Starting program: /usr/bin/ssh
- [Thread debugging using libthread_db enabled]
- Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
- 
- Program received signal SIGSEGV, Segmentation fault.
- 0x in ?? ()
- (gdb) bt
- #0  0x in ?? ()
- #1  0x77670e77 in poll (__timeout=10, __nfds=1, 
__fds=0x7fffdb70)
- at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
- #2  RAND_poll () at rand_unix.c:325
- #3  0x7766fbd5 in ssleay_rand_bytes (buf=0x55804010 
"\212\003", num=num@entry=60,
- pseudo=pseudo@entry=0, lock=lock@entry=0) at md_rand.c:398
- #4  0x77670603 in drbg_get_entropy (ctx=, 
pout=0x7fffdec0,
- entropy=, min_len=60, max_len=) at 
rand_lib.c:199
- #5  0x776e6278 in fips_get_entropy 
(dctx=dctx@entry=0x779a9960 ,
- pout=pout@entry=0x7fffdf30, entropy=, 
min_len=,
- max_len=2147483632) at fips_drbg_lib.c:151
- #6  0x776e6904 in FIPS_drbg_instantiate 
(dctx=dctx@entry=0x779a9960 ,
- pers=pers@entry=0x7fffdf80 "OpenSSL DRBG2.0", 
perslen=perslen@entry=32)
- at fips_drbg_lib.c:223
- #7  0x77670993 in RAND_init_fips () at rand_lib.c:302
- #8  0x775b3f7a in OPENSSL_init_library () at o_init.c:119
- #9  0x77de74ea in call_init (l=, argc=argc@entry=1,
- argv=argv@entry=0x7fffe078, env=env@entry=0x7fffe088) at 
dl-init.c:72
- #10 0x77de75fb in call_init (env=0x7fffe088, 
argv=0x7fffe078, argc=1,
- l=) at dl-init.c:30
- #11 _dl_init (main_map=0x77ffe168, argc=1, argv=0x7fffe078, 
env=0x7fffe088)
- at dl-init.c:120
- #12 0x77dd7cfa in _dl_start_user () from 
/lib64/ld-linux-x86-64.so.2
- #13 0x0001 in ?? ()
- #14 0x7fffe4da in ?? ()
- #15 0x in ?? ()
- 
- Since Xenial does not have debugging symbols for tsocks, I can't provide much 
more (although
- I'd gladly follow a quick and simple tutorial on doing so).
- 
- For the record, it was working in Wily (15.10) and all previous
- versions.
+ i have a same problem with tsocks and ssh.

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