On 02/19/2013 12:15 AM, Eric Sandeen wrote:
On 2/18/13 5:11 PM, John Reiser wrote:
It would be useful to have a "backward compatibility" LD_PRELOAD shared
library which intercepts the caller of stat32, and sets .st_ino to 0,
without generating EOVERFLOW, whenever the actual inode number exceeds
32 bits. This would allow the *option* of continued operation
(postponing the work of portability enhancements) for the vast majority
of packages which do use stat() but do not inspect .st_ino.
Yep, that would make some sense as a workaround. FWIW, here's a systemtap
script which intercepts ext4 stat & bumps the inode nr past 2^32
(line numbers work on F18/kernel 3.7-8-ish at least)
Do you have something similar for readdir? Do you know what the kernel
does in this case?
It would be quite annoying if the result was a truncated or incomplete
directory listing.
--
Florian Weimer / Red Hat Product Security Team
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