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 Jul 16 04:01:33 2008  
Votes:  1  
Category: NoneSeverity: 3 - Normal
Item Group: NoneStatus: None
Privacy: PublicAssigned to: None
Open/Closed: Open

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Tue Apr 27 10:48:56 2010, 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:
has not been applied.

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

(jfbeam - gmail.com, btw)

Wed Jul 16 04:01:33 2008, 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).



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