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scsi: lpfc: Fix null ndlp ptr dereference in abnormal exit path for GFT_ID 

An error case exit from lpfc_cmpl_ct_cmd_gft_id() results in a call to
lpfc_nlp_put() with a null pointer to a nodelist structure.

Changed lpfc_cmpl_ct_cmd_gft_id() to initialize nodelist pointer upon
entry.

Link: https://lore.kernel.org/r/20220819011736.14141-3-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2022-08-18 18:17:31 -07:00 committed by Martin K. Petersen
parent 439b93293f
commit 59b7e210a5
1 changed files with 2 additions and 5 deletions
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7
drivers/scsi/lpfc/lpfc_ct.c
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@ -1509,7 +1509,7 @@ lpfc_cmpl_ct_cmd_gft_id(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
struct lpfc_sli_ct_request *CTrsp;
int did;
struct lpfc_nodelist *ndlp = NULL;
struct lpfc_nodelist *ns_ndlp = NULL;
struct lpfc_nodelist *ns_ndlp = cmdiocb->ndlp;
uint32_t fc4_data_0, fc4_data_1;
u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
u32 ulp_word4 = get_job_word4(phba, rspiocb);
@ -1522,15 +1522,12 @@ lpfc_cmpl_ct_cmd_gft_id(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
ulp_status, ulp_word4, did);
/* Ignore response if link flipped after this request was made */
if ((uint32_t) cmdiocb->event_tag != phba->fc_eventTag) {
if ((uint32_t)cmdiocb->event_tag != phba->fc_eventTag) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"9046 Event tag mismatch. Ignoring NS rsp\n");
goto out;
}
/* Preserve the nameserver node to release the reference. */
ns_ndlp = cmdiocb->ndlp;
if (ulp_status == IOSTAT_SUCCESS) {
/* Good status, continue checking */
CTrsp = (struct lpfc_sli_ct_request *)outp->virt;