linux-kernel - [PATCH] fix SEM_UNDO with namespaces, take 2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <47F8F99D.1070701@colorfullife.com>
Date:	Sun, 06 Apr 2008 18:26:05 +0200
From:	Manfred Spraul <manfred@...orfullife.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
CC:	"Serge E. Hallyn" <serue@...ibm.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sukadev Bhattiprolu <sukadev@...ibm.com>
Subject: [PATCH] fix SEM_UNDO with namespaces, take 2

Hi,

below is the second attempt to fix SEM_UNDO + unshare():
lookup_undo (in ipc/sem.c) is not namespace-aware, thus all entries in 
sysvsem.undo_list must be from the same namespace.
The patch enforces that by detaching the current thread from 
sysvsem.undo_list in switch_task_namespaces() if the ipc namespace is 
changed.

The patch boots and passes simple sysvsem+unshare tests.

Signed-Off-By: Manfred Spraul <manfred@...orfullife.com>

View attachment "patch-namespace-detach" of type "text/plain" (1129 bytes)