linux-kernel - [PATCH] correct sys_shmget allocation check

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Message-ID: <52dd17640701231020s2ce96f09kc134cdb4432b154f@mail.gmail.com>
Date:	Tue, 23 Jan 2007 12:20:04 -0600
From:	"Guy Streeter" <guy.streeter@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	torvalds@...l.org
Subject: [PATCH] correct sys_shmget allocation check

As written, sys_shmget will return ENOSPC when one page is still
available for allocation. This patch corrects the test.

Signed-off-by: Guy Streeter <guy.streeter+lkml@...il.com>

--

Index: linux-2.6/ipc/shm.c
===================================================================
--- linux-2.6.orig/ipc/shm.c
+++ linux-2.6/ipc/shm.c
@@ -279,7 +279,7 @@ static int newseg (struct ipc_namespace
       if (size < SHMMIN || size > ns->shm_ctlmax)
               return -EINVAL;

-       if (ns->shm_tot + numpages >= ns->shm_ctlall)
+       if (ns->shm_tot + numpages > ns->shm_ctlall)
               return -ENOSPC;

       shp = ipc_rcu_alloc(sizeof(*shp));
-
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