From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Date: Mon, 24 Aug 2020 08:59:33 +0000 Subject: [PATCH] scsi: libcxgbi: Fix a use after free in cxgbi_conn_xmit_pdu() Message-Id: <20200824085933.GD208317@mwanda> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "James E.J. Bottomley" Cc: "Martin K. Petersen" , Varun Prakash , Pankaj Bharadiya , Austin Kim , linux-scsi@vger.kernel.org, kernel-janitors@vger.kernel.org We accidentally move this logging printk after the free, but that leads to a use after free. Fixes: e33c2482289b ("scsi: cxgb4i: Add support for iSCSI segmentation offload") Signed-off-by: Dan Carpenter --- drivers/scsi/cxgbi/libcxgbi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c index 71aebaf533ea..0e8621a6956d 100644 --- a/drivers/scsi/cxgbi/libcxgbi.c +++ b/drivers/scsi/cxgbi/libcxgbi.c @@ -2457,10 +2457,10 @@ 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; -- 2.28.0