commit bc1a5b1393b08be6871835a25cb23f6528965650
author Kelvin Zhang <zhangkelvin@google.com> Fri Dec 02 09:50:44 2022 -0800
committer Kelvin Zhang <zhangkelvin@google.com> Fri Dec 02 09:50:44 2022 -0800
tree 9c11fc177755c0b205b395b11b359c959a9a4c77
parent ccf13942e05ce18c1365f4d8703de6d8fd1c6e6d

Fix nullptr access when cow reader open fails

Bug: 260805150
Test: th
Change-Id: Id945cc4fa0fce141e3d52b8259241e22ba590ebd

fs_mgr/libsnapshot/snapshot_writer.cpp

diff --git a/fs_mgr/libsnapshot/snapshot_writer.cpp b/fs_mgr/libsnapshot/snapshot_writer.cpp
index 6aad3d1..82a7fd7 100644
--- a/fs_mgr/libsnapshot/snapshot_writer.cpp
+++ b/fs_mgr/libsnapshot/snapshot_writer.cpp
@@ -93,6 +93,9 @@
 
 std::unique_ptr<FileDescriptor> CompressedSnapshotWriter::OpenReader() {
     auto cow = OpenCowReader();
+    if (cow == nullptr) {
+        return nullptr;
+    }
 
     auto reader = std::make_unique<CompressedSnapshotReader>();
     if (!reader->SetCow(std::move(cow))) {