netdev - [PATCH net v7 7/7] libcxgbi: fix freeing skb prematurely

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Message-Id: <201412102024.sBAKOLSx011549@localhost6.localdomain6>
Date:	Wed, 10 Dec 2014 12:24:21 -0800
From:	Karen Xie <kxie@...lsio.com>
To:	linux-scsi@...r.kernel.org, netdev@...r.kernel.org
Cc:	kxie@...lsio.com, hariprasad@...lsio.com, anish@...lsio.com,
	hch@...radead.org, James.Bottomley@...senPartnership.com,
	michaelc@...wisc.edu, davem@...emloft.net
Subject: [PATCH net v7 7/7] libcxgbi: fix freeing skb prematurely

[PATCH net v7 7/7] libcxgbi: fix freeing skb too early 

From: Karen Xie <kxie@...lsio.com>

With debug turned on the debug print would access the skb after it is freed. Fix it to free the skb after the debug print.

Signed-off-by: Karen Xie <kxie@...lsio.com>
---
 drivers/scsi/cxgbi/libcxgbi.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index 7da59c3..eb58afc 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -2294,10 +2294,12 @@ int cxgbi_conn_xmit_pdu(struct iscsi_task *task)
 		return err;
 	}
 
-	kfree_skb(skb);
 	log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
 		"itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
 		task->itt, skb, skb->len, skb->data_len, err);
+
+	kfree_skb(skb);
+
 	iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err);
 	iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED);
 	return err;
--
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