group.of.nepali.translators team mailing list archive

[Eric Desrochers <eric.desrochers@xxxxxxxxxxxxx>]

Update:

I've been asked to look at this problem

It does segfault on Xenial, but it is also reproducible using Zesty
privileged container.

In fact, it is a behavior not yet reported nor fix upstream. I can
confirm it by having tested the reproducer against the latest and
greatest compiled by hand lshw binary using Xenial privileged container.

It tries to open '/sys/kernel/debug/usb/devices' that exist but doesn't
have permission to be fopen and then try '/proc/bus/usb/devices' which
doesn't exist. I agree with Rafael that there must be a better mechanism
to be protected against this situation.

--
root@priv:/tmp/lshw# ls -altr /proc/bus/usb/devices
ls: cannot access '/proc/bus/usb/devices': No such file or directory

root@priv:/tmp/lshw# ls -altr /sys/kernel/debug/usb/devices
-r--r--r-- 1 root root 0 Oct 11 11:19 /sys/kernel/debug/usb/devices

root@priv:/tmp/lshw# cat /sys/kernel/debug/usb/devices
cat: /sys/kernel/debug/usb/devices: Permission denied
---

So this look like it'll need to be fix upstream first.
I'll start to look at it.

I tried to create a new ticket with ezIX without success, their tracker is giving me errors.
I have emailed Lyonel Vincent, so he can hopefully file the bug on our behalf.

- Eric

** Also affects: lshw (Ubuntu Artful)
   Importance: Medium
     Assignee: Rafael David Tinoco (inaddy)
       Status: Confirmed

** Also affects: lshw (Ubuntu Zesty)
   Importance: Undecided
       Status: New

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

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

-- 
You received this bug notification because you are a member of नेपाली
भाषा समायोजकहरुको समूह, which is subscribed to Xenial.
Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1699161

Title:
  lshw crashes with SEGV in privileged containers

Status in lshw package in Ubuntu:
  Confirmed
Status in lshw source package in Xenial:
  Confirmed
Status in lshw source package in Zesty:
  Confirmed
Status in lshw source package in Artful:
  Confirmed

Bug description:
  When running lshw in a Xenial container, I'm getting a segmentation
  fault. I'll attach the apport crash dump.

  ```
  stgraber@castiana:~$ lxc launch ubuntu:16.04 priv -c security.privileged=true
  Creating priv
  Starting priv

  stgraber@castiana:~$ lxc exec priv bash
  root@priv:~# lshw
  Segmentation fault
  root@priv:~#
  ```

  [strace of lshw]
  open("/usr/share/hwdata/usb.ids", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/etc/usb.ids", O_RDONLY)          = -1 ENOENT (No such file or directory)
  open("/usr/share/usb.ids", O_RDONLY)    = -1 ENOENT (No such file or directory)
  open("/usr/local/share/usb.ids", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/usr/share/lshw-common/usb.ids", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/usr/share/usb.ids", O_RDONLY)    = -1 ENOENT (No such file or directory)
  open("/sys/kernel/debug/usb/devices", O_RDONLY) = -1 EACCES (Permission denied)
  open("/proc/bus/usb/devices", O_RDONLY) = -1 ENOENT (No such file or directory)
  --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0} ---
  +++ killed by SIGSEGV +++
  Segmentation fault

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/lshw/+bug/1699161/+subscriptions