Bug 1000018

Summary: terminal emulators don't work after update to glibc-2.17-13.fc19
Product: [Fedora] Fedora Reporter: Dragos Tatulea <dragos.tatulea>
Component: glibcAssignee: Carlos O'Donell <codonell>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 19CC: codonell, dragos.tatulea, fweimer, jakub, law, pfrankli, schwab, spoyarek
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Hardware: x86_64   
OS: Unspecified   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2013-08-23 08:19:34 UTC Type: Bug
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urxvt strace log none

Description Dragos Tatulea 2013-08-22 13:59:08 UTC 
Created attachment 789211 [details]
urxvt strace log

Description of problem:
After doing a yum upgrade, most terminal emulators don't want to start (gnome-terminal, urxvt, tmux)

Version-Release number of selected component (if applicable):
glibc-2.17-13.fc19

How reproducible:
Just start urxvt, tmux, gnome-terminal.

Steps to Reproduce:
1. run urxvt

Actual results:
urxvt: can't initialize pseudo-tty, aborting.

Expected results:
urxvt starts without errors

Additional info:

* Narrowed it down to glibc. There's a pty chown CVE fix in there [1]

* After downgrading glibc, everything is back to normal.

* Here's how devpts is mounted:
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,mode=600,ptmxmode=000)

* Attached strace log. Check out the chown err on /dev/pts/1.

[1] - https://admin.fedoraproject.org/updates/FEDORA-2013-15053/glibc-2.17-13.fc19?_csrf_token=390be9769cd733681beb5e86c521ebc6eabb6de6
Comment 1 Siddhesh Poyarekar 2013-08-22 14:42:29 UTC 
devpts is mounted by default as:

devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)

Not having gid=5 in your mount options is wrong and should not occur in a default installation.  In fact, I had mentioned that in a note in the update link you posted.

Unless there is reason to believe that the default fedora install options resulted in gid=5 not being present, this is not a bug.  Do you know how your system ended up without gid=5 in the mount options?
Comment 2 Dragos Tatulea 2013-08-23 08:19:34 UTC 
Ooops. PEBCAK. Found the issue: I deleted the devpts line in fstab and it was getting mounted with default arguments. After fixing that all works fine.