From d3d6b84552c97c0fec9da6faa976fc08c8db336e Mon Sep 17 00:00:00 2001
From: Swapneel Mashalkar <quic_smashalk@quicinc.com>
Date: Tue, 24 Jan 2023 09:57:14 +0000
Subject: [PATCH] UDC: Dm-Bow failed to load when size is not Multiple of 4096

BUG : 240098675

Skip Dm-Bow load incase size is not a Multiple of 4096.
Rounding down does not hurt, since ext4 will only use full blocks

Change-Id: Ie4e6634b2c49762e4669e66d94effc91d8e581ca
Signed-off-by: Swapneel Mashalkar <quic_smashalk@quicinc.com>
---
 fs_mgr/fs_mgr.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index 1c1ab48d4..742cdfab0 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -1176,6 +1176,10 @@ class CheckpointManager {
                     return false;
                 }
 
+                // dm-bow will not load if size is not a multiple of 4096
+                // rounding down does not hurt, since ext4 will only use full blocks
+                size &= ~7;
+
                 android::dm::DmTable table;
                 auto bowTarget =
                         std::make_unique<android::dm::DmTargetBow>(0, size, entry->blk_device);