linux-kernel - can't change euid 0 to uid != running user

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Message-ID: <20071005142541.GA9224@bit.office.eurotux.com>
Date:	Fri, 5 Oct 2007 15:25:43 +0100
From:	Luciano Rocha <strange@....no-ip.org>
To:	linux-kernel@...r.kernel.org
Subject: can't change euid 0 to uid != running user


Hello,

I have the following problem:
$ sudo -u ie -s # or sudo su ie
unable to change to runas uid: Resource temporarily unavailable

Works:
$ sudo su, followed by su ie

The first sudo also worked while I had a shell under user ie.

When I exited, it stopped working, but it is now working every time I
trie it.

dmesg shows:

[82602.729330] kobject_add failed for 504 with -EEXIST, don't try to
               register things with the same name in the same directory.
[82602.729365]  [<c04b9195>] kobject_shadow_add+0x16e/0x1a0
[82602.729383]  [<c04b9480>] kobject_set_name+0x29/0x92
[82602.729504]  [<c04238ea>] user_kobject_create+0x6a/0x90
[82602.729520]  [<c0423cce>] alloc_uid+0x18f/0x1d7
[82602.729530]  [<c0427030>] set_user+0x1c/0x8f
[82602.729539]  [<c0428b5f>] sys_setresuid+0xd5/0x162
[82602.729552]  [<c0403e6a>] syscall_call+0x7/0xb
[82602.729575]  =======================

$ git describe
v2.6.23-rc9-156-ga95dacb

(Clone of Linus' tree, after rc9, with some patches from
mingo/linux-2.6-sched-devel.git, and a fix for lguest (didn't link due
to kasprintf)).

-- 
lfr
0/0

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