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

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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>
This commit is contained in:
Anirban Chakraborty 2009-09-28 13:52:58 -07:00 committed by James Bottomley
parent 2c2ed8bfd8
commit c7922a911c
1 changed files with 4 additions and 2 deletions
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6
drivers/scsi/qla2xxx/qla_mid.c
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@ -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;
}