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scsi: lpfc: Fix lpfc_io_buf resource leak in lpfc_get_scsi_buf_s4 error path 

If a call to lpfc_get_cmd_rsp_buf_per_hdwq returns NULL (memory allocation
failure), a previously allocated lpfc_io_buf resource is leaked.

Fix by releasing the lpfc_io_buf resource in the failure path.

Fixes: d79c9e9d4b ("scsi: lpfc: Support dynamic unbounded SGL lists on G7 hardware.")
Cc: <stable@vger.kernel.org> # v5.4+
Link: https://lore.kernel.org/r/20200128002312.16346-3-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@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 2020-01-27 16:23:02 -08:00 committed by Martin K. Petersen
parent 39c4f1a965
commit 0ab384a49c
1 changed files with 3 additions and 1 deletions
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4
drivers/scsi/lpfc/lpfc_scsi.c
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@ -671,8 +671,10 @@ lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
lpfc_cmd->prot_data_type = 0;
#endif
tmp = lpfc_get_cmd_rsp_buf_per_hdwq(phba, lpfc_cmd);
if (!tmp)
if (!tmp) {
lpfc_release_io_buf(phba, lpfc_cmd, lpfc_cmd->hdwq);
return NULL;
}
lpfc_cmd->fcp_cmnd = tmp->fcp_cmnd;
lpfc_cmd->fcp_rsp = tmp->fcp_rsp;