commit 4b9c47d70fd3f7dd36ed9f7e9a3a289d794ecbae
author Paul Crowley <paulcrowley@google.com> Fri Dec 07 15:36:09 2018 -0800
committer android-build-team Robot <android-build-team-robot@google.com> Tue Apr 16 22:39:52 2019 +0000
tree 19d87c37071399d2db53c35cde76003f6aab99cf
parent 74b92dc85f060d2bd88246c8e187ad3ae8e8b8d1

Fsync directories after creating files

Bug: 112145641
Bug: 124279741
Bug: 120248692
Test: adb shell locksettings set-pin 1111 && \
    adb shell "echo b > /proc/sysrq-trigger"
Change-Id: I53d252942c21365983b4f8b6e0948b1864f195c1
Merged-In: I53d252942c21365983b4f8b6e0948b1864f195c1
(cherry picked from commit 2e58acb4123e559fddfd4013af3ead6c055bd71c)

KeyStorage.cpp

diff --git a/KeyStorage.cpp b/KeyStorage.cpp
index 0518930..84dd8ec 100644
--- a/KeyStorage.cpp
+++ b/KeyStorage.cpp
@@ -480,6 +480,7 @@
         if (!encryptWithoutKeymaster(appId, key, &encryptedKey)) return false;
     }
     if (!writeStringToFile(encryptedKey, dir + "/" + kFn_encrypted_key)) return false;
+    if (!FsyncDirectory(dir)) return false;
     return true;
 }