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From: Dan Carpenter <dan.carpenter-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
To: "J. Bruce Fields" <bfields-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
Cc: Trond Myklebust
	<trond.myklebust-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>,
	"David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
	linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	kernel-janitors-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [patch] SUNRPC: off by one in BUG_ON()
Date: Wed, 29 Oct 2014 11:44:16 +0300	[thread overview]
Message-ID: <20141029084416.GC8939@mwanda> (raw)

The m->pool_to[] array has "maxpools" number of elements.  It's
allocated in svc_pool_map_alloc_arrays() which we called earlier in the
function.  This test should be >= instead of >.

Signed-off-by: Dan Carpenter <dan.carpenter-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
---
This is very old code, but hopefully the off by one doesn't affect
runtime.

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index ca8a795..349c98f 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -189,7 +189,7 @@ svc_pool_map_init_percpu(struct svc_pool_map *m)
 		return err;
 
 	for_each_online_cpu(cpu) {
-		BUG_ON(pidx > maxpools);
+		BUG_ON(pidx >= maxpools);
 		m->to_pool[cpu] = pidx;
 		m->pool_to[pidx] = cpu;
 		pidx++;
--
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             reply	other threads:[~2014-10-29  8:44 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-29  8:44 Dan Carpenter [this message]
2014-10-29 15:38 ` [patch] SUNRPC: off by one in BUG_ON() J. Bruce Fields

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