Re: [PATCH v3a] vsprintf: Check real user/group id for %pK

[Eric W. Biederman]

Ryan Mallon <rmallon@xxxxxxxxx> writes:

> The only remaining problem is kernel/module.c:module_sect_show() which
> is used to write the sysfs files in /sys/module/<modname>/sections/.
> Those files are actually are really good target for leaking %pK values
> via setuid binaries. The problem is that the module_sect_show() function
> isn't passed information about who opened the sysfs file. I don't think
> this information is available in general for sysfs files either. Also,
> I can't actually see how module_sect_show() gets called?
>
> I'm a bit stuck on how to solve this. Any ideas?

I haven't yet had a chance to review the patches but there are patches
to make sysfs files seq files in Greg's driver core tree.

Eric
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