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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2022-09-22 19:53:23 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-09-25 20:02:23 +0300 |
| commit | c682df71996aee74c6a50d0fe491c135a7bea1e7 (patch) | |
| tree | 908099c81509602677db864eb2e86ff418a7d8a5 /drivers/scsi/hptiop.c | |
| parent | d8c22c4697c11ed28062afe3c2b377025be11a23 (diff) | |
| download | linux-c682df71996aee74c6a50d0fe491c135a7bea1e7.tar.xz | |
scsi: hptiop: Replace one-element array with flexible-array member
One-element arrays are deprecated, and we are replacing them with flexible
array members instead. So, replace one-element array with flexible-array
member in struct hpt_iop_request_scsi_command and refactor the rest of the
code, accordingly.
The following pieces of code suggest that the one element of array sg_list
in struct hpt_iop_request_scsi_command is not taken into account when
calculating the total size for both struct hpt_iop_request_scsi_command and
the maximum number of elements sg_list will contain:
1047 req->header.size = cpu_to_le32(
1048 sizeof(struct hpt_iop_request_scsi_command)
1049 - sizeof(struct hpt_iopsg)
1050 + sg_count * sizeof(struct hpt_iopsg));
1400 req_size = sizeof(struct hpt_iop_request_scsi_command) 1401 + sizeof(struct hpt_iopsg) * (hba->max_sg_descriptors - 1);
So it's safe to replace the one-element array with a flexible-array member
and update the code above, accordingly: now we don't need to subtract
sizeof(struct hpt_iopsg) from sizeof(struct hpt_iop_request_scsi_command)
because this is implicitly done by the flex-array transformation.
Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/205
Link: https://lore.kernel.org/r/6238ccf37798e36d783f5ce5e483e6837e98be79.1663865333.git.gustavoars@kernel.org
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/hptiop.c')
| -rw-r--r-- | drivers/scsi/hptiop.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/scsi/hptiop.c b/drivers/scsi/hptiop.c index f18b770626e6..cfc6546e35a6 100644 --- a/drivers/scsi/hptiop.c +++ b/drivers/scsi/hptiop.c @@ -1046,7 +1046,6 @@ static int hptiop_queuecommand_lck(struct scsi_cmnd *scp) req->lun = scp->device->lun; req->header.size = cpu_to_le32( sizeof(struct hpt_iop_request_scsi_command) - - sizeof(struct hpt_iopsg) + sg_count * sizeof(struct hpt_iopsg)); memcpy(req->cdb, scp->cmnd, sizeof(req->cdb)); @@ -1398,7 +1397,7 @@ static int hptiop_probe(struct pci_dev *pcidev, const struct pci_device_id *id) host->max_cmd_len = 16; req_size = sizeof(struct hpt_iop_request_scsi_command) - + sizeof(struct hpt_iopsg) * (hba->max_sg_descriptors - 1); + + sizeof(struct hpt_iopsg) * hba->max_sg_descriptors; if ((req_size & 0x1f) != 0) req_size = (req_size + 0x1f) & ~0x1f; |