linux-kernel - [PATCH 1/3] blk-mq: Sanity check reserved tags

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Date:	Fri, 2 Aug 2013 16:05:25 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	Mike Christie <michaelc@...wisc.edu>,
	Shaohua Li <shli@...ionio.com>
Subject: [PATCH 1/3] blk-mq: Sanity check reserved tags

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 block/blk-mq-tag.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index dcbc2a4..6718007 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -335,6 +335,8 @@ static void __blk_mq_put_reserved_tag(struct blk_mq_tags *tags,
 {
 	unsigned long flags;
 
+	BUG_ON(tag >= tags->reserved_tags);
+
 	spin_lock_irqsave(&tags->lock, flags);
 	tags->reservelist[tags->nr_reserved] = tag;
 	tags->nr_reserved++;
-- 
1.7.7.6


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