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From: Dan Carpenter <dan.carpenter@oracle.com>
To: QLogic-Storage-Upstream@qlogic.com,
	David Somayajulu <david.somayajulu@qlogic.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] iscsi: qla4xxx: fix double free in probe
Date: Tue, 3 Dec 2019 12:45:09 +0300
Message-ID: <20191203094421.hw7ex7qr3j2rbsmx@kili.mountain> (raw)

On this error path we call qla4xxx_mem_free() and then the caller also
calls qla4xxx_free_adapter() which calls qla4xxx_mem_free().  It leads
to a couple double frees:

drivers/scsi/qla4xxx/ql4_os.c:8856 qla4xxx_probe_adapter() warn: 'ha->chap_dma_pool' double freed
drivers/scsi/qla4xxx/ql4_os.c:8856 qla4xxx_probe_adapter() warn: 'ha->fw_ddb_dma_pool' double freed

Fixes: afaf5a2d341d ("[SCSI] Initial Commit of qla4xxx")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/scsi/qla4xxx/ql4_os.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 8c674eca09f1..2323432a0edb 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -4275,7 +4275,6 @@ static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
 	return QLA_SUCCESS;
 
 mem_alloc_error_exit:
-	qla4xxx_mem_free(ha);
 	return QLA_ERROR;
 }
 
-- 
2.11.0


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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-03  9:45 Dan Carpenter [this message]
2019-12-04 15:08 ` Manish Rangankar
2019-12-10  0:02 ` Martin K. Petersen

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