git: 27777283da79 - releng/13.4 - ctl: avoid heap info leak in ctl_request_sense
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Date: Mon, 26 Aug 2024 18:30:14 UTC
The branch releng/13.4 has been updated by emaste: URL: https://cgit.FreeBSD.org/src/commit/?id=27777283da79cbfa39ba10b65c748f49884be7fe commit 27777283da79cbfa39ba10b65c748f49884be7fe Author: Ed Maste <emaste@FreeBSD.org> AuthorDate: 2024-08-20 18:12:47 +0000 Commit: Ed Maste <emaste@FreeBSD.org> CommitDate: 2024-08-26 18:29:40 +0000 ctl: avoid heap info leak in ctl_request_sense Previously 3 bytes of data from the heap could be leaked to ctl consumers. Reported by: Synacktiv Reviewed by: asomers, mav Sponsored by: The Alpha-Omega Project Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D46091 (cherry picked from commit db87c98168b1605f067d283fa36a710369c3849d) (cherry picked from commit 131b7dcb2fbf8f15815387f60536d9cc16585b0d) (cherry picked from commit 51768dc31df6379aa4a1447a15f054508d16b4b1) Approved by: re (cperciva) --- sys/cam/ctl/ctl.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/sys/cam/ctl/ctl.c b/sys/cam/ctl/ctl.c index a31bbd3c8342..7a04a668e823 100644 --- a/sys/cam/ctl/ctl.c +++ b/sys/cam/ctl/ctl.c @@ -9339,14 +9339,8 @@ ctl_request_sense(struct ctl_scsiio *ctsio) sense_ptr = (struct scsi_sense_data *)ctsio->kern_data_ptr; ctsio->kern_sg_entries = 0; ctsio->kern_rel_offset = 0; - - /* - * struct scsi_sense_data, which is currently set to 256 bytes, is - * larger than the largest allowed value for the length field in the - * REQUEST SENSE CDB, which is 252 bytes as of SPC-4. - */ - ctsio->kern_data_len = cdb->length; - ctsio->kern_total_len = cdb->length; + ctsio->kern_data_len = ctsio->kern_total_len = + MIN(cdb->length, sizeof(*sense_ptr)); /* * If we don't have a LUN, we don't have any pending sense.