bugGNU cpio - Bugs: bug #23863, copyout can truncate ino numbers...

 
 

bug #23863: copyout can truncate ino numbers for hardlinks

Submitted by:  None
Submitted on:  Wed 16 Jul 2008 04:01:33 AM UTC  
Votes:  1  
 
Category:  None Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open

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Tue 27 Apr 2010 10:48:56 AM UTC, comment #2:

I stumbled over this problem too in Ubuntu 10.04 which is too be released soon and I'm curious why the patch available here:
http://www.mail-archive.com/bug-cpio@gnu.org/msg00307.html
has not been applied.

Peter Funk <pefu>
Wed 16 Jul 2008 04:02:49 AM UTC, comment #1:

(jfbeam - gmail.com, btw)

Anonymous
Wed 16 Jul 2008 04:01:33 AM UTC, original submission:

copy{in,out}.c has a number of places where new_cpio_header fields become signed/truncated. For example:
count_defered_links_to_dev_ino (struct new_cpio_header *)
{
int ino;
...
ino = file_hdr->c_ino;

new_cpio_header's c_ino is of type "unsigned long". Converting to an "int" will destroy large inode numbers and throughly confuse the process of archiving hardlinks.

I wondered why my archives were suddenly 20MB smaller. It's because there are hundreds of zero byte hardlinks. Nice.

I can provide a patch, but it's made for RHEL4 (CentOS).

Anonymous

 

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