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[Bug 936032] Re: Gwibber crashes when using PAX

 

Hello Bilal.

I can reproduce it:

jorgeml@baraddur ~ $ gwibber
warning: line 6432: incompatible stripping characters and condition
warning: line 6444: incompatible stripping characters and condition
Terminado (killed)

Gentoo is a Linux distribution: http://www.gentoo.org/

I do not use Ubuntu.

Thanks!

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https://bugs.launchpad.net/bugs/936032

Title:
  Gwibber crashes when using PAX

Status in Gwibber:
  Incomplete
Status in Gentoo Linux:
  New

Bug description:
  I am running Hardened Gentoo on amd64.

  Gwibber 3.1.0 only shows the main window for a fraction of a second
  and then crashes:

  jorgeml@baraddur ~ $ gwibber -d -o
  warning: line 6432: incompatible stripping characters and condition
  warning: line 6444: incompatible stripping characters and condition
  Terminado (killed)

  The PAX log shows:

  Feb 19 10:23:38 baraddur kernel: [ 2678.900447] PAX: execution attempt in: <anonymous mapping>, 27dfbfff000-27e3bfff000 27dfbfff000
  Feb 19 10:23:38 baraddur kernel: [ 2678.900453] PAX: terminating task: /usr/bin/python2.7(gwibber):7276, uid/euid: 1000/1000, PC: 0000027dfbfff300, SP: 000003a71dd16be8
  Feb 19 10:23:38 baraddur kernel: [ 2678.900456] PAX: bytes at PC: 90 59 49 89 4d f0 49 bb 0a 00 00 00 00 00 00 00 4d 89 5d 00
  Feb 19 10:23:38 baraddur kernel: [ 2678.900467] PAX: bytes at SP-8: 0000000000000000 0000027e4f29f119 0000000000000000 0000000000000000 0000000000000000 7fffffff00000001 8fb5602c00000000 757befeaa1d58275 0000027e49fee300 0000027e49fee578 0000027e48053f20

  Disabling MPROTECT in Python ( sudo paxctl -m /usr/bin/python2.7 )
  solves the issue but that defeates the purpose of a hardened system.

  Please let me know if I can be of any help with the troubleshooting.

  Thanks in advance.

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References