Date: Mon, 19 Dec 2016 18:55:10 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r310284 - head/sys/cam/scsi Message-ID: <201612191855.uBJItANu019723@repo.freebsd.org>
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Author: mav Date: Mon Dec 19 18:55:10 2016 New Revision: 310284 URL: https://svnweb.freebsd.org/changeset/base/310284 Log: When writing fixed format sense data, set VALID bit only if provided value for INFORMATION field fit into available 4 bytes (has no non-zero bytes except last 4), as explicitly required by SPC-5 specification. MFC after: 2 weeks Modified: head/sys/cam/scsi/scsi_all.c Modified: head/sys/cam/scsi/scsi_all.c ============================================================================== --- head/sys/cam/scsi/scsi_all.c Mon Dec 19 18:32:26 2016 (r310283) +++ head/sys/cam/scsi/scsi_all.c Mon Dec 19 18:55:10 2016 (r310284) @@ -4020,11 +4020,17 @@ scsi_set_sense_data_va(struct scsi_sense data_dest = &sense->info[0]; len_to_copy = MIN(sense_len, sizeof(sense->info)); - /* - * We're setting the info field, so - * set the valid bit. - */ - sense->error_code |= SSD_ERRCODE_VALID; + + /* Set VALID bit only if no overflow. */ + for (i = 0; i < sense_len - len_to_copy; + i++) { + if (data[i] != 0) + break; + } + if (i >= sense_len - len_to_copy) { + sense->error_code |= + SSD_ERRCODE_VALID; + } } /*
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