[Bug 1573307] Re: wget crashed with SIGSEGV in __memset_avx2()

[Patrick Roncagliolo]

Hi,

patrick at patrick-W230SD:~$ lsb_release -rd
Description:	Ubuntu 16.04.1 LTS
Release:	16.04

patrick at patrick-W230SD:~$ uname -srp
Linux 4.8.0 x86_64

patrick at patrick-W230SD:~$ apt policy wget 
wget:
  Installato: 1.17.1-1ubuntu1.1
  Candidato:  1.17.1-1ubuntu1.1
  Tabella versione:
 *** 1.17.1-1ubuntu1.1 500
        500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 Packages
        100 /var/lib/dpkg/status
     1.17.1-1ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages


patrick at patrick-W230SD:~$ gdb --args wget http://download.altera.com/akdlm/software/acdsinst/16.0.2/222/ib_tar/Quartus-lite-16.0.2.222-linux.tar --limit-rate=200k
(gdb) r
Starting program: /usr/bin/wget http://download.altera.com/akdlm/software/acdsinst/16.0.2/222/ib_tar/Quartus-lite-16.0.2.222-linux.tar --limit-rate=200k
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
--2016-10-09 11:05:27--  http://download.altera.com/akdlm/software/acdsinst/16.0.2/222/ib_tar/Quartus-lite-16.0.2.222-linux.tar
Risoluzione di download.altera.com (download.altera.com)... 213.254.17.232, 213.254.17.225
Connessione a download.altera.com (download.altera.com)|213.254.17.232|:80... connesso.
Richiesta HTTP inviata, in attesa di risposta... 200 OK
Lunghezza: 13122283520 (12G) [application/x-tar]
Salvataggio in: "Quartus-lite-16.0.2.222-linux.tar.3"

 Quartus-lite-16.0.2.222-l   0%[                                      ] 582,49K   200KB/s               
Program received signal SIGSEGV, Segmentation fault.
__memset_avx2 () at ../sysdeps/x86_64/multiarch/memset-avx2.S:161
161	../sysdeps/x86_64/multiarch/memset-avx2.S: File o directory non esistente.


patrick at patrick-W230SD:~$ wget http://download.altera.com/akdlm/software/acdsinst/16.0.2/222/ib_tar/Quartus-lite-16.0.2.222-linux.tar --limit-rate=200k -c -b
Prosecuzione in background, pid 6146.
L'output sarà scritto su "wget-log".

patrick at patrick-W230SD:~$ progress -p 6146
[ 6146] wget /home/patrick/Quartus-lite-16.0.2.222-linux.tar
	100.0% (340.3 MiB / 340.3 MiB)

Comment:
background execution ok, seg fault while displaying download of large fles (12 Gb in this case).

-- 
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https://bugs.launchpad.net/bugs/1573307

Title:
  wget crashed with SIGSEGV in __memset_avx2()

Status in wget package in Ubuntu:
  Confirmed

Bug description:
  When I try to download a big file with wget on Ubuntu 16.04 it crashes
  after a couple seconds.

  To reproduce the bug try the following:

  wget http://releases.ubuntu.com/16.04/ubuntu-16.04-desktop-amd64.iso

  I've asked another guy on IRC on channel #ubuntu-it to try and reproduce this bug
  and he said it was crashing also on his machine.

  evan at HPPC:~$ lsb_release -rd
  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  evan at HPPC:~$ apt-cache policy wget
  wget:
    Installato: 1.17.1-1ubuntu1
    Candidato:  1.17.1-1ubuntu1
    Tabella versione:
   *** 1.17.1-1ubuntu1 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  ProblemType: Crash
  DistroRelease: Ubuntu 16.04
  Package: wget 1.17.1-1ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Apr 22 01:34:10 2016
  ExecutablePath: /usr/bin/wget
  InstallationDate: Installed on 2016-04-21 (0 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcCmdline: wget http://releases.ubuntu.com/16.04/ubuntu-16.04-desktop-amd64.iso
  SegvAnalysis:
   Segfault happened at: 0x7f4eac3b7328 <__memset_avx2+392>:	rep stos %al,%es:(%rdi)
   PC (0x7f4eac3b7328) ok
   source "%al" ok
   destination "%es:(%rdi)" (0x562969134000) not located in a known VMA region (needed writable region)!
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: wget
  StacktraceTop:
   __memset_avx2 () at ../sysdeps/x86_64/multiarch/memset-avx2.S:161
   ?? ()
   ?? ()
   ?? ()
   ?? ()
  Title: wget crashed with SIGSEGV in __memset_avx2()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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