Author: dab
Date: Thu Mar 19 12:22:20 2020
New Revision: 359129
URL: https://svnweb.freebsd.org/changeset/base/359129

Log:
  Fix parameter reversal potentially causing buffer overrun.
  
  Two arguments were reversed in calls to cam_strvis() in
  nvme_da.c. This was found by a Coverity scan of this code within Dell
  (Isilon). These are also marked in the FreeBSD Coverity scan as CIDs
  1400526 & 1400531.
  
  Submitted by: robert.hern...@dell.com
  Reviewed by:  vangyzen@, imp@
  MFC after:    3 days
  Sponsored by: Dell EMC Isilon
  Differential Revision:        https://reviews.freebsd.org/D24117

Modified:
  head/sys/cam/nvme/nvme_da.c

Modified: head/sys/cam/nvme/nvme_da.c
==============================================================================
--- head/sys/cam/nvme/nvme_da.c Thu Mar 19 10:32:38 2020        (r359128)
+++ head/sys/cam/nvme/nvme_da.c Thu Mar 19 12:22:20 2020        (r359129)
@@ -815,9 +815,9 @@ ndaregister(struct cam_periph *periph, void *arg)
         *  the serial or model number strings.
         */
        cam_strvis(disk->d_descr, cd->mn,
-           sizeof(disk->d_descr), NVME_MODEL_NUMBER_LENGTH);
+           NVME_MODEL_NUMBER_LENGTH, sizeof(disk->d_descr));
        cam_strvis(disk->d_ident, cd->sn,
-           sizeof(disk->d_ident), NVME_SERIAL_NUMBER_LENGTH);
+           NVME_SERIAL_NUMBER_LENGTH, sizeof(disk->d_ident));
        disk->d_hba_vendor = cpi.hba_vendor;
        disk->d_hba_device = cpi.hba_device;
        disk->d_hba_subvendor = cpi.hba_subvendor;
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