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Message-Id: <20121220124751.d7ccbd8e.akpm@linux-foundation.org> Date: Thu, 20 Dec 2012 12:47:51 -0800 From: Andrew Morton <akpm@...ux-foundation.org> To: Stanislav Kinsbursky <skinsbursky@...allels.com> Cc: <serge.hallyn@...onical.com>, <ebiederm@...ssion.com>, <linux-kernel@...r.kernel.org>, <xemul@...allels.com>, <catalin.marinas@....com>, <will.deacon@....com>, <jmorris@...ei.org>, <cmetcalf@...era.com>, <joe.korty@...r.com>, <dhowells@...hat.com>, <dledford@...hat.com>, <viro@...iv.linux.org.uk>, <kosaki.motohiro@...fujitsu.com>, <linux-api@...r.kernel.org>, <serue@...ibm.com>, <tglx@...utronix.de>, <paulmck@...ux.vnet.ibm.com>, <devel@...nvz.org>, <mtk.manpages@...il.com>, Sasha Levin <sasha.levin@...cle.com>, Wu Fengguang <fengguang.wu@...el.com> Subject: Re: [RFC PATCH v8 0/5] IPC: checkpoint/restore in userspace enhancements On Thu, 20 Dec 2012 08:06:32 +0400 Stanislav Kinsbursky <skinsbursky@...allels.com> wrote: > 19.12.2012 00:36, Andrew Morton __________: > > On Wed, 24 Oct 2012 19:34:51 +0400 > > Stanislav Kinsbursky <skinsbursky@...allels.com> wrote: > > > >> This respin of the patch set was significantly reworked. Most part of new API > >> was replaced by sysctls (by one per messages, semaphores and shared memory), > >> allowing to preset desired id for next new IPC object. > >> > >> This patch set is aimed to provide additional functionality for all IPC > >> objects, which is required for migration of these objects by user-space > >> checkpoint/restore utils (CRIU). > >> > >> The main problem here was impossibility to set up object id. This patch set > >> solves the problem by adding new sysctls for preset of desired id for new IPC > >> object. > >> > >> Another problem was to peek messages from queues without deleting them. > >> This was achived by introducing of new MSG_COPY flag for sys_msgrcv(). If > >> MSG_COPY flag is set, then msgtyp is interpreted as message number. > > According to my extensive records, Sasha hit a bug in > > ipc-message-queue-copy-feature-introduced.patch and Fengguang found a > > bug in > > ipc-message-queue-copy-feature-introduced-cleanup-do_msgrcv-aroung-msg_copy-feature.patch > > > > It's not obvious (to me) that these things have been identified and > > fixed. What's the status, please? > > Hello, Andrew. > Fengguang's issue was solved by "ipc: simplify message copying" I sent you. > But I can't find Sasha's issue. As I remember, there was some problem in > early > version of the patch set. But I believe its fixed now. http://lkml.indiana.edu/hypermail/linux/kernel/1210.3/01710.html Subject: "ipc, msgqueue: NULL ptr deref in msgrcv" -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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