linux-kernel - [PATCH] correct sys_shmget allocation check

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: Windows password security audit tool. GUI, reports in PDF.

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

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));
-
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/