From: Christoph Pleger <christoph.pleger@cs.uni-dortmund.de>
To: linux-kernel@vger.kernel.org
Subject: Permission problems - though all three UIDs are 0
Date: Wed, 21 Nov 2018 16:51:50 +0100 [thread overview]
Message-ID: <0236bec1badc3e2cbbcbda6306dfa3d6@cs.uni-dortmund.de> (raw)
Hello,
I want to ask for the possible reasons why a program, called from
another program with setuid-root file permissions and an additional
setreuid(0,0) to also set the real uid to 0, still gets an "Operation
not permitted" error.
In my case, I execve lvcreate from the setuid-root binary. This works
well when I use my program as a non-root user from the command line, but
I want to call it is a non-root user from pam_exec PAM module and with
that lvcreate fails.
Regards
Christoph
PS: Please, no discussion about possible security holes in
setuid-programs here
reply other threads:[~2018-11-21 15:57 UTC|newest]
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