linux-kernel - [PATCH v2 1/1] qla2xxx: Fix Null ptr dereference in fail path in queue create code

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Date:	Mon, 28 Sep 2009 10:19:36 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	James.Bottomley@...e.de
Cc:	linux-scsi@...r.kernel.org,
	Andrew Vasquez <andrew.vasquez@...gic.com>,
	linux-kernel@...r.kernel.org,
	Anirban Chakraborty <anirban.chakraborty@...gic.com>
Subject: [PATCH v2 1/1] qla2xxx: Fix Null ptr dereference in fail path in queue create code

From: Anirban Chakraborty <anirban.chakraborty@...gic.com>

Current code jumps to fail path in queue create functions and there it invokes
the queue free call with a (NULL) pointer to the queue which could not be
allocated. Fix it by returning ENOMEM directly without invoking the queue free
call.

[v2] use return 0 instead of return ENOMEM. Callers expect that.

Signed-off-by Jiri Slaby <jirislaby@...il.com>
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@...gic.com>
---
 drivers/scsi/qla2xxx/qla_mid.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
index 42b799a..005050e 100644
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -568,7 +568,7 @@ qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
 	if (req == NULL) {
 		qla_printk(KERN_WARNING, ha, "could not allocate memory"
 			"for request que\n");
-		goto que_failed;
+		return 0;
 	}
 
 	req->length = REQUEST_ENTRY_CNT_24XX;
@@ -659,7 +659,7 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
 	if (rsp == NULL) {
 		qla_printk(KERN_WARNING, ha, "could not allocate memory for"
 				" response que\n");
-		goto que_failed;
+		return 0;
 	}
 
 	rsp->length = RESPONSE_ENTRY_CNT_MQ;
-- 
1.6.4.2

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