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scsi: lpfc: Fix defects reported by Coverity Scan

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Addressed the following reported defects:

** CID 1411552:  Control flow issues  (MISSING_BREAK)
/drivers/scsi/lpfc/lpfc_sli.c: 13259 in lpfc_sli4_nvmet_handle_rcqe()

** CID 1411553:  Memory - illegal accesses  (OVERRUN)
/drivers/scsi/lpfc/lpfc_sli.c: 16218 in lpfc_fc_frame_check()

** CID 1411553:  Memory - illegal accesses  (OVERRUN)
   Overrunning array "lpfc_rctl_names" of 202 8-byte elements at element
   index 244 (byte offset 1952) using index "fc_hdr->fh_r_ctl" (which
   evaluates to 244).

** CID 1411554:  Null pointer dereferences  (REVERSE_INULL)
/drivers/scsi/lpfc/lpfc_nvmet.c: 2131 in lpfc_nvmet_unsol_fcp_abort_cmp()

** CID 1411555:  Memory - illegal accesses  (UNINIT)
/drivers/scsi/lpfc/lpfc_nvmet.c: 180 in lpfc_nvmet_ctxbuf_post()

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2017-06-01 21:07:09 -07:00 committed by Martin K. Petersen
parent b57ab7469d
commit 78e1d2009f
2 changed files with 13 additions and 21 deletions
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10
drivers/scsi/lpfc/lpfc_nvmet.c
View File

@ -170,7 +170,6 @@ lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
struct lpfc_nvmet_tgtport *tgtp;
struct fc_frame_header *fc_hdr;
struct rqb_dmabuf *nvmebuf;
struct lpfc_dmabuf *hbufp;
uint32_t *payload;
uint32_t size, oxid, sid, rc;
unsigned long iflag;
@ -191,7 +190,6 @@ lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
if (phba->sli4_hba.nvmet_io_wait_cnt) {
hbufp = &nvmebuf->hbuf;
list_remove_head(&phba->sli4_hba.lpfc_nvmet_io_wait_list,
nvmebuf, struct rqb_dmabuf,
hbuf.list);
@ -2164,10 +2162,6 @@ lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
status = bf_get(lpfc_wcqe_c_status, wcqe);
result = wcqe->parameter;
tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
if (ctxp->flag & LPFC_NVMET_ABORT_OP)
atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
if (!ctxp) {
/* if context is clear, related io alrady complete */
lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
@ -2177,6 +2171,10 @@ lpfc_nvmet_unsol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
return;
}
tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
if (ctxp->flag & LPFC_NVMET_ABORT_OP)
atomic_inc(&tgtp->xmt_fcp_abort_cmpl);
/* Sanity check */
if (ctxp->state != LPFC_NVMET_STE_ABORT) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_ABTS,

24
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -13267,6 +13267,7 @@ lpfc_sli4_nvmet_handle_rcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
case FC_STATUS_RQ_BUF_LEN_EXCEEDED:
lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
"6126 Receive Frame Truncated!!\n");
/* Drop thru */
case FC_STATUS_RQ_SUCCESS:
lpfc_sli4_rq_release(hrq, drq);
spin_lock_irqsave(&phba->hbalock, iflags);
@ -16137,9 +16138,6 @@ lpfc_sli4_post_scsi_sgl_block(struct lpfc_hba *phba,
return rc;
}
static char *lpfc_rctl_names[] = FC_RCTL_NAMES_INIT;
static char *lpfc_type_names[] = FC_TYPE_NAMES_INIT;
/**
* lpfc_fc_frame_check - Check that this frame is a valid frame to handle
* @phba: pointer to lpfc_hba struct that the frame was received on
@ -16214,22 +16212,18 @@ lpfc_fc_frame_check(struct lpfc_hba *phba, struct fc_frame_header *fc_hdr)
}
lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
"2538 Received frame rctl:%s (x%x), type:%s (x%x), "
"2538 Received frame rctl:x%x, type:x%x, "
"frame Data:%08x %08x %08x %08x %08x %08x %08x\n",
(fc_hdr->fh_r_ctl == FC_RCTL_MDS_DIAGS) ? "MDS Diags" :
lpfc_rctl_names[fc_hdr->fh_r_ctl], fc_hdr->fh_r_ctl,
(fc_hdr->fh_type == FC_TYPE_VENDOR_UNIQUE) ?
"Vendor Unique" : lpfc_type_names[fc_hdr->fh_type],
fc_hdr->fh_type, be32_to_cpu(header[0]),
be32_to_cpu(header[1]), be32_to_cpu(header[2]),
be32_to_cpu(header[3]), be32_to_cpu(header[4]),
be32_to_cpu(header[5]), be32_to_cpu(header[6]));
fc_hdr->fh_r_ctl, fc_hdr->fh_type,
be32_to_cpu(header[0]), be32_to_cpu(header[1]),
be32_to_cpu(header[2]), be32_to_cpu(header[3]),
be32_to_cpu(header[4]), be32_to_cpu(header[5]),
be32_to_cpu(header[6]));
return 0;
drop:
lpfc_printf_log(phba, KERN_WARNING, LOG_ELS,
"2539 Dropped frame rctl:%s type:%s\n",
lpfc_rctl_names[fc_hdr->fh_r_ctl],
lpfc_type_names[fc_hdr->fh_type]);
"2539 Dropped frame rctl:x%x type:x%x\n",
fc_hdr->fh_r_ctl, fc_hdr->fh_type);
return 1;
}