Hello Suganath Prabu Subramani,
The patch aff39e61218f: "scsi: mpt3sas: Added support for nvme
encapsulated request message." from Oct 31, 2017, leads to the
following static checker warning:
drivers/scsi/mpt3sas/mpt3sas_base.c:1459 _base_build_nvme_prp()
error: buffer overflow 'nvme_encap_request->NVMe_Command' 4 <= 24
drivers/scsi/mpt3sas/mpt3sas_base.c
1453 /*
1454 * Set pointers to PRP1 and PRP2, which are in the NVMe command.
1455 * PRP1 is located at a 24 byte offset from the start of the NVMe
^^^^^^^
The ->NVMe_Command is declared as a 4 byte array so this makes static
checkers puzzled how there are more than 24 bytes in it.
1456 * command. Then set the current PRP entry pointer to PRP1.
1457 */
1458 prp1_entry = (__le64 *)(nvme_encap_request->NVMe_Command +
1459 NVME_CMD_PRP1_OFFSET);
1460 prp2_entry = (__le64 *)(nvme_encap_request->NVMe_Command +
1461 NVME_CMD_PRP2_OFFSET);
1462 prp_entry = prp1_entry;
1463 /*
1464 * For the PRP entries, use the specially allocated buffer of
1465 * contiguous memory.
1466 */
1467 prp_page = (__le64 *)mpt3sas_base_get_pcie_sgl(ioc, smid);
1468 prp_page_phys = (__le64 *)mpt3sas_base_get_pcie_sgl_dma(ioc, smid);
1469
regards,
dan carpenter
