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[SCSI] qla2xxx: Help Coverity with analyzing ct_sns_pkt initialization.

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Coverity reports "Overrunning struct type ct_sns_req of 1228 bytes
by passing it to a function which accesses it at byte offset 8207"
for each qla2x00_prep_ct_req(), qla2x00_prep_ct_fdmi_req() and
qla24xx_prep_ct_fm_req() call. Help Coverity to recognize that
these calls do not trigger a buffer overflow by making it explicit
that these three functions initializes both the request and reply
structures. This patch does not change any functionality.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Bart Van Assche 2013-06-25 11:27:28 -04:00 committed by James Bottomley
parent 7f544d0069
commit 6ec6f9094a
1 changed files with 39 additions and 44 deletions
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83
drivers/scsi/qla2xxx/qla_gs.c
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@ -99,17 +99,17 @@ qla24xx_prep_ms_iocb(scsi_qla_host_t *vha, uint32_t req_size, uint32_t rsp_size)
* Returns a pointer to the intitialized @ct_req.
*/
static inline struct ct_sns_req *
qla2x00_prep_ct_req(struct ct_sns_req *ct_req, uint16_t cmd, uint16_t rsp_size)
qla2x00_prep_ct_req(struct ct_sns_pkt *p, uint16_t cmd, uint16_t rsp_size)
{
memset(ct_req, 0, sizeof(struct ct_sns_pkt));
memset(p, 0, sizeof(struct ct_sns_pkt));
ct_req->header.revision = 0x01;
ct_req->header.gs_type = 0xFC;
ct_req->header.gs_subtype = 0x02;
ct_req->command = cpu_to_be16(cmd);
ct_req->max_rsp_size = cpu_to_be16((rsp_size - 16) / 4);
p->p.req.header.revision = 0x01;
p->p.req.header.gs_type = 0xFC;
p->p.req.header.gs_subtype = 0x02;
p->p.req.command = cpu_to_be16(cmd);
p->p.req.max_rsp_size = cpu_to_be16((rsp_size - 16) / 4);
return (ct_req);
return &p->p.req;
}
static int
@ -188,7 +188,7 @@ qla2x00_ga_nxt(scsi_qla_host_t *vha, fc_port_t *fcport)
GA_NXT_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, GA_NXT_CMD,
ct_req = qla2x00_prep_ct_req(ha->ct_sns, GA_NXT_CMD,
GA_NXT_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
@ -284,8 +284,7 @@ qla2x00_gid_pt(scsi_qla_host_t *vha, sw_info_t *list)
gid_pt_rsp_size);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, GID_PT_CMD,
gid_pt_rsp_size);
ct_req = qla2x00_prep_ct_req(ha->ct_sns, GID_PT_CMD, gid_pt_rsp_size);
ct_rsp = &ha->ct_sns->p.rsp;
/* Prepare CT arguments -- port_type */
@ -359,7 +358,7 @@ qla2x00_gpn_id(scsi_qla_host_t *vha, sw_info_t *list)
GPN_ID_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, GPN_ID_CMD,
ct_req = qla2x00_prep_ct_req(ha->ct_sns, GPN_ID_CMD,
GPN_ID_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
@ -421,7 +420,7 @@ qla2x00_gnn_id(scsi_qla_host_t *vha, sw_info_t *list)
GNN_ID_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, GNN_ID_CMD,
ct_req = qla2x00_prep_ct_req(ha->ct_sns, GNN_ID_CMD,
GNN_ID_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
@ -495,7 +494,7 @@ qla2x00_rft_id(scsi_qla_host_t *vha)
RFT_ID_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, RFT_ID_CMD,
ct_req = qla2x00_prep_ct_req(ha->ct_sns, RFT_ID_CMD,
RFT_ID_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
@ -551,7 +550,7 @@ qla2x00_rff_id(scsi_qla_host_t *vha)
RFF_ID_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, RFF_ID_CMD,
ct_req = qla2x00_prep_ct_req(ha->ct_sns, RFF_ID_CMD,
RFF_ID_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
@ -606,8 +605,7 @@ qla2x00_rnn_id(scsi_qla_host_t *vha)
RNN_ID_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, RNN_ID_CMD,
RNN_ID_RSP_SIZE);
ct_req = qla2x00_prep_ct_req(ha->ct_sns, RNN_ID_CMD, RNN_ID_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
/* Prepare CT arguments -- port_id, node_name */
@ -676,7 +674,7 @@ qla2x00_rsnn_nn(scsi_qla_host_t *vha)
ms_pkt = ha->isp_ops->prep_ms_iocb(vha, 0, RSNN_NN_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, RSNN_NN_CMD,
ct_req = qla2x00_prep_ct_req(ha->ct_sns, RSNN_NN_CMD,
RSNN_NN_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
@ -1262,18 +1260,18 @@ qla2x00_update_ms_fdmi_iocb(scsi_qla_host_t *vha, uint32_t req_size)
* Returns a pointer to the intitialized @ct_req.
*/
static inline struct ct_sns_req *
qla2x00_prep_ct_fdmi_req(struct ct_sns_req *ct_req, uint16_t cmd,
qla2x00_prep_ct_fdmi_req(struct ct_sns_pkt *p, uint16_t cmd,
uint16_t rsp_size)
{
memset(ct_req, 0, sizeof(struct ct_sns_pkt));
memset(p, 0, sizeof(struct ct_sns_pkt));
ct_req->header.revision = 0x01;
ct_req->header.gs_type = 0xFA;
ct_req->header.gs_subtype = 0x10;
ct_req->command = cpu_to_be16(cmd);
ct_req->max_rsp_size = cpu_to_be16((rsp_size - 16) / 4);
p->p.req.header.revision = 0x01;
p->p.req.header.gs_type = 0xFA;
p->p.req.header.gs_subtype = 0x10;
p->p.req.command = cpu_to_be16(cmd);
p->p.req.max_rsp_size = cpu_to_be16((rsp_size - 16) / 4);
return ct_req;
return &p->p.req;
}
/**
@ -1301,8 +1299,7 @@ qla2x00_fdmi_rhba(scsi_qla_host_t *vha)
ms_pkt = ha->isp_ops->prep_ms_fdmi_iocb(vha, 0, RHBA_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_fdmi_req(&ha->ct_sns->p.req, RHBA_CMD,
RHBA_RSP_SIZE);
ct_req = qla2x00_prep_ct_fdmi_req(ha->ct_sns, RHBA_CMD, RHBA_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
/* Prepare FDMI command arguments -- attribute block, attributes. */
@ -1490,8 +1487,7 @@ qla2x00_fdmi_dhba(scsi_qla_host_t *vha)
DHBA_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_fdmi_req(&ha->ct_sns->p.req, DHBA_CMD,
DHBA_RSP_SIZE);
ct_req = qla2x00_prep_ct_fdmi_req(ha->ct_sns, DHBA_CMD, DHBA_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
/* Prepare FDMI command arguments -- portname. */
@ -1547,8 +1543,7 @@ qla2x00_fdmi_rpa(scsi_qla_host_t *vha)
ms_pkt = ha->isp_ops->prep_ms_fdmi_iocb(vha, 0, RPA_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_fdmi_req(&ha->ct_sns->p.req, RPA_CMD,
RPA_RSP_SIZE);
ct_req = qla2x00_prep_ct_fdmi_req(ha->ct_sns, RPA_CMD, RPA_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
/* Prepare FDMI command arguments -- attribute block, attributes. */
@ -1775,7 +1770,7 @@ qla2x00_gfpn_id(scsi_qla_host_t *vha, sw_info_t *list)
GFPN_ID_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, GFPN_ID_CMD,
ct_req = qla2x00_prep_ct_req(ha->ct_sns, GFPN_ID_CMD,
GFPN_ID_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
@ -1842,18 +1837,18 @@ qla24xx_prep_ms_fm_iocb(scsi_qla_host_t *vha, uint32_t req_size,
static inline struct ct_sns_req *
qla24xx_prep_ct_fm_req(struct ct_sns_req *ct_req, uint16_t cmd,
qla24xx_prep_ct_fm_req(struct ct_sns_pkt *p, uint16_t cmd,
uint16_t rsp_size)
{
memset(ct_req, 0, sizeof(struct ct_sns_pkt));
memset(p, 0, sizeof(struct ct_sns_pkt));
ct_req->header.revision = 0x01;
ct_req->header.gs_type = 0xFA;
ct_req->header.gs_subtype = 0x01;
ct_req->command = cpu_to_be16(cmd);
ct_req->max_rsp_size = cpu_to_be16((rsp_size - 16) / 4);
p->p.req.header.revision = 0x01;
p->p.req.header.gs_type = 0xFA;
p->p.req.header.gs_subtype = 0x01;
p->p.req.command = cpu_to_be16(cmd);
p->p.req.max_rsp_size = cpu_to_be16((rsp_size - 16) / 4);
return ct_req;
return &p->p.req;
}
/**
@ -1889,8 +1884,8 @@ qla2x00_gpsc(scsi_qla_host_t *vha, sw_info_t *list)
GPSC_RSP_SIZE);
/* Prepare CT request */
ct_req = qla24xx_prep_ct_fm_req(&ha->ct_sns->p.req,
GPSC_CMD, GPSC_RSP_SIZE);
ct_req = qla24xx_prep_ct_fm_req(ha->ct_sns, GPSC_CMD,
GPSC_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;
/* Prepare CT arguments -- port_name */
@ -2000,7 +1995,7 @@ qla2x00_gff_id(scsi_qla_host_t *vha, sw_info_t *list)
GFF_ID_RSP_SIZE);
/* Prepare CT request */
ct_req = qla2x00_prep_ct_req(&ha->ct_sns->p.req, GFF_ID_CMD,
ct_req = qla2x00_prep_ct_req(ha->ct_sns, GFF_ID_CMD,
GFF_ID_RSP_SIZE);
ct_rsp = &ha->ct_sns->p.rsp;