Commit 332ba3b5 authored by James Smart's avatar James Smart Committed by Martin K. Petersen

scsi: lpfc: don't dereference dma_buf->iocbq before null check

From: Colin Ian King <colin.king@canonical.com>

dma_buf->iocbq is being dereferenced immediately before it is
being null checked, so we have a potential null pointer dereference
bug.  Fix this by only dereferencing it only once we have passed
a null check on the pointer.

Detected by CoverityScan, CID#1411652 ("Dereference before null check")
Signed-off-by: default avatarColin Ian King <colin.king@canonical.com>
Signed-off-by: default avatarJames Smart <james.smart@broadcom.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 7aabe84b
...@@ -646,7 +646,6 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba) ...@@ -646,7 +646,6 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
} }
dma_buf->iocbq = lpfc_sli_get_iocbq(phba); dma_buf->iocbq = lpfc_sli_get_iocbq(phba);
dma_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
if (!dma_buf->iocbq) { if (!dma_buf->iocbq) {
kfree(dma_buf->context); kfree(dma_buf->context);
pci_pool_free(phba->lpfc_drb_pool, dma_buf->dbuf.virt, pci_pool_free(phba->lpfc_drb_pool, dma_buf->dbuf.virt,
...@@ -658,6 +657,7 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba) ...@@ -658,6 +657,7 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
"2621 Ran out of nvmet iocb/WQEs\n"); "2621 Ran out of nvmet iocb/WQEs\n");
return NULL; return NULL;
} }
dma_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
nvmewqe = dma_buf->iocbq; nvmewqe = dma_buf->iocbq;
wqe = (union lpfc_wqe128 *)&nvmewqe->wqe; wqe = (union lpfc_wqe128 *)&nvmewqe->wqe;
/* Initialize WQE */ /* Initialize WQE */
......
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