[linux-lvm] lvcreate from a setuid-root binary

[Vladislav Bogdanov]

On 21.11.2018 12:56, Christoph Pleger wrote:
> Hello,
> 
> On 2018-11-16 16:41, Stuart D. Gathman wrote:
>> It's not very elegant, but the quick and dirty solution is to use sudo
> 
> probably you had not yet read that far in this thread, but I already 
> wrote that sudo does not work when called from pam_exec.
> 
> To get the stderr and stdout results of sudo, I wrote a shell script 
> wrapper around it, and the results are (maybe because sudo itself uses 
> PAM?):
> 
> sudo: unable to change to root gid: Operation not permitted
> sudo: unable to initialize policy plugin

May be silly question: Do you have selinux or equivalent enabled?

> 
> Someone wrote that he assumes that pam_exec ignores the setuid-bit in 
> the file permissions, but that is obviously wrong, as this whole thread 
> is about why lvcreate, when being called from my setuid-root-binary, has 
> permission problems though all three (real, effective and saved) UIDs 
> are 0 (and of course I checked that they really are 0).
> 
> Regards
>    Christoph
> 
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