From: Guy Streeter <guy.streeter@gmail.com>
Date: Tue, 23 Jan 2007 18:20:04 +0000 (-0600)
Subject: [PATCH] correct sys_shmget allocation check
X-Git-Tag: v2.6.20-rc6~17
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=f66d45e99eb7ca91822c3e3f6d7a98843c9626cb;p=~shefty%2Frdma-dev.git

[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@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
--
---

diff --git a/ipc/shm.c b/ipc/shm.c
index 6d16bb6de7d..f8e10a25ad7 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -279,7 +279,7 @@ static int newseg (struct ipc_namespace *ns, key_t key, int shmflg, size_t size)
 	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));