Bug 227642 - /proc/*/exe symlinks with trailing garbage
/proc/*/exe symlinks with trailing garbage
Status: CLOSED INSUFFICIENT_DATA
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
6
i686 Linux
medium Severity medium
: ---
: ---
Assigned To: Alexander Viro
Brian Brock
:
Depends On:
Blocks: 427887
  Show dependency treegraph
 
Reported: 2007-02-07 05:44 EST by Gary Benson
Modified: 2008-02-07 23:29 EST (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Environment:
Last Closed: 2008-02-07 23:29:22 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)

  None (edit)
Description Gary Benson 2007-02-07 05:44:34 EST
Description of problem:
I keep finding /proc/*/exe symlinks with trailing garbage on my box:

ultra:[~]$ cat readlink.c
#include <stdio.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
  char buf[BUFSIZ];
  int i, j, n;

  for (i = 1; i < argc; i++)
    {
      n = readlink(argv[i], buf, BUFSIZ);

      for (j = 0; j < n; j++)
        {
          char c = buf[j];
          if (c == '\\')
            printf("\\\\");
          else if (c > 32 && c < 127)
            putchar(c);
          else
            printf("\\x%02x", c);
        }
      putchar('\n');
    }
}
ultra:[~]$ gcc readlink.c -o readlink
ultra:[~]$ ./readlink /proc/30781/exe
/usr/bin/fetchmail\x00cation\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20(deleted)

Version-Release number of selected component (if applicable):
kernel-2.6.19-1.2895.fc6

How reproducible:
It seems fairly random which processes will get garbled links, but once a
process has one it keeps it until it's killed as far as I can tell.

Steps to Reproduce:
1. Run the above program on /proc/*/exe
2. Look for junk
Comment 1 Jon Stanley 2008-01-07 20:56:06 EST
(This is a mass-update to all current FC6 kernel bugs in NEW state)

Hello,

I'm reviewing this bug list as part of the kernel bug triage project, an attempt
to isolate current bugs in the Fedora kernel.

http://fedoraproject.org/wiki/KernelBugTriage

I am CC'ing myself to this bug, however this version of Fedora is no longer
maintained.

Please attempt to reproduce this bug with a current version of Fedora (presently
Fedora 8). If the bug no longer exists, please close the bug or I'll do so in a
few days if there is no further information lodged.

Thanks for using Fedora!
Comment 2 Jon Stanley 2008-02-07 23:29:22 EST
Per the previous comment in this bug, I am closing it as INSUFFICIENT_DATA,
since no information has been lodged for over 30 days.

Please re-open this bug or file a new one if you can provide the requested data,
and thanks for filing the original report!

Note You need to log in before you can comment on or make changes to this bug.