commit 8f62566566360663fcc333660b5ecd2bf2df37b8
author Matthew Maurer <mmaurer@google.com> Fri Jul 10 13:50:32 2020 -0700
committer Matthew Maurer <mmaurer@google.com> Fri Jul 10 22:09:01 2020 +0000
tree 6a4dc49f867b4dccd194244b04f33a05d54130b0
parent 4d3c2846053c9196977243923a218c0fe78f8044

trusty: rpmb_dev: Prevent desync between rpmb_dev and storageproxyd

The mock RPMB can get out of sync with TD storage blocks in the event of
panic or crash. Making this O_SYNC will prevent this from happening.

Bug: 160723681
Test: None
Change-Id: Ia16dfc88ceae56e4e9724a42ac0db492c0e707a4

trusty/utils/rpmb_dev/rpmb_dev.c

diff --git a/trusty/utils/rpmb_dev/rpmb_dev.c b/trusty/utils/rpmb_dev/rpmb_dev.c
index af97eba..5de1efa 100644
--- a/trusty/utils/rpmb_dev/rpmb_dev.c
+++ b/trusty/utils/rpmb_dev/rpmb_dev.c
@@ -591,7 +591,7 @@
         return EXIT_SUCCESS;
     }
 
-    open_flags = O_RDWR;
+    open_flags = O_RDWR | O_SYNC;
     if (init) {
         open_flags |= O_CREAT | O_TRUNC;
     }