[SCSI] qla2xxx: Fix NULL ptr deref bug in fail path during queue create

Current code attempts to clean up resources when queue create fails and there it
invokes queue free call with a (NULL) pointer to the queue which could not be
allocated in the first place. Fix it by returning directly without invoking the
queue free call as no resources has been allocated at that point of time.

Reported-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
index 42b799abba57da6bda0dc35b6fcf133d9092da8b..e07b3617f019397188cd24674fdcfabe09e49eb5 100644 (file)
--- 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;
+               goto failed;
        }
 
        req->length = REQUEST_ENTRY_CNT_24XX;
@@ -632,6 +632,7 @@ qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
 
 que_failed:
        qla25xx_free_req_que(base_vha, req);
+failed:
        return 0;
 }
 
@@ -659,7 +660,7 @@ 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;
+               goto failed;
        }
 
        rsp->length = RESPONSE_ENTRY_CNT_MQ;
@@ -728,6 +729,7 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
 
 que_failed:
        qla25xx_free_rsp_que(base_vha, rsp);
+failed:
        return 0;
 }