linux-kernel - [PATCH 4/5] percpu_ida: Sanity check initialization parameters

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Date:	Mon, 28 Oct 2013 11:06:06 +0100
From:	Alexander Gordeev <agordeev@...hat.com>
To:	Kent Overstreet <kmo@...erainc.com>
Cc:	Oleg Nesterov <oleg@...hat.com>, Jens Axboe <axboe@...nel.dk>,
	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/5] percpu_ida: Sanity check initialization parameters

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 lib/percpu_ida.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/lib/percpu_ida.c b/lib/percpu_ida.c
index 4adc3e5..1fc89f9 100644
--- a/lib/percpu_ida.c
+++ b/lib/percpu_ida.c
@@ -298,6 +298,11 @@ int __percpu_ida_init(struct percpu_ida *pool, unsigned long nr_tags,
 {
 	unsigned i, cpu, order;
 
+	if (batch_size > max_size)
+		return -ERANGE;
+	if (!batch_size)
+		return -EINVAL;
+
 	memset(pool, 0, sizeof(*pool));
 
 	init_waitqueue_head(&pool->wait);
-- 
1.7.7.6


-- 
Regards,
Alexander Gordeev
agordeev@...hat.com
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