Check its alignment and value for possible bad values.
Cc: Marvin Häuser <[email protected]>
Signed-off-by: Pedro Falcato <[email protected]>
---
Features/Ext4Pkg/Ext4Dxe/Superblock.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Features/Ext4Pkg/Ext4Dxe/Superblock.c
b/Features/Ext4Pkg/Ext4Dxe/Superblock.c
index c22155ba11b4..edee051c41e8 100644
--- a/Features/Ext4Pkg/Ext4Dxe/Superblock.c
+++ b/Features/Ext4Pkg/Ext4Dxe/Superblock.c
@@ -189,6 +189,12 @@ Ext4OpenSuperblock (
Partition->FeaturesIncompat = Sb->s_feature_incompat;
Partition->FeaturesRoCompat = Sb->s_feature_ro_compat;
Partition->InodeSize = Sb->s_inode_size;
+
+ // Check for proper alignment of InodeSize and that InodeSize is indeed
larger than
+ // the minimum size, 128 bytes.
+ if (((Partition->InodeSize % 4) != 0) || (Partition->InodeSize <
EXT4_GOOD_OLD_INODE_SIZE)) {
+ return EFI_VOLUME_CORRUPTED;
+ }
} else {
// GOOD_OLD_REV
Partition->FeaturesCompat = Partition->FeaturesIncompat =
Partition->FeaturesRoCompat = 0;
--
2.37.1
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