[Bug 1105758] Re: On my PC, gcry_cipher_encrypt() doesn't release all x87 FPU data registers .

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** Tags added: patch

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Title:
  On my PC, gcry_cipher_encrypt() doesn't release all x87 FPU data
  registers .

Status in “libgcrypt11” package in Ubuntu:
  New

Bug description:
  1)
  Description:    Xubuntu 12.10 desktop i386
  Release:        12.10
  PC: Sony PCG-SRX7S/P Memory 512 M byte http://www.sony.jp/products/biz/vaio/PCG-SRX7S_P/spec.html
  Chipset: Intel 815EM
  $ cat /proc/cpuinfo
  processor       : 0
  vendor_id       : GenuineIntel
  cpu family      : 6
  model           : 11
  model name      : Mobile Intel(R) Pentium(R) III CPU - M   900MHz
  stepping        : 4
  microcode       : 0x2
  cpu MHz         : 500.000
  cache size      : 512 KB
  fdiv_bug        : no
  hlt_bug         : no
  f00f_bug        : no
  coma_bug        : no
  fpu             : yes
  fpu_exception   : yes
  cpuid level     : 2
  wp              : yes
  flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pse36 mmx fxsr sse up
  bogomips        : 993.64
  clflush size    : 32
  cache_alignment : 32
  address sizes   : 36 bits physical, 32 bits virtual
  power management:
  $ uname -a
  Linux loghost 3.5.0-22-generic #34-Ubuntu SMP Tue Jan 8 21:41:11 UTC 2013 i686 i686 i686 GNU/Linux

  
  2)
  libgcrypt11 1.5.0-3ubuntu1
  gnome-keyring 3.6.1-0ubuntu1

  3) What you expected to happen
  $apt-get -b source gnome-keyring
  $cd gnome-keyring-3.6.1/
  $make -k check | tee make-k-check2.txt
  	→all check OK

  4) What happened instead
  	→ but /gnome2-store/import/pkcs12: was FAIL on the PC .
  See also https://dl.dropbox.com/u/86335040/make-k-check2.txt .

  
  5) I analyzed the gnome-keyring program. 
  So I found that gcry_cipher_encrypt() doesn't release all x87 FPU data registers .
  Then -nan goes into a variable subsequent processing.

  This problem found on the test of /gnome2-store/import/pkcs12 on
  gnome-keyring-3.6.1,
  function is encrypt_buffer() in gnome-keyring-3.6.1/pkcs11/gnome2-store/gkm-gnome2-file.c .

  I wrote a reappearance program .
  https://dl.dropbox.com/u/86335040/bug.tar.gz .
  Please check it, and please fix this problem

  
  See also https://forums.ubuntulinux.jp/viewtopic.php?id=14643 
  and http://d.hatena.ne.jp/Itisango/searchdiary?word=%2A%5Bgnome-keyring%5D .

  Thanks .

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