Superblock s_inodes_per_group field can't be zero, it leads to division
by zero in BlockGroup routine Ext4ReadInode
Cc: Marvin Häuser <mhaeu...@posteo.de>
Cc: Pedro Falcato <pedro.falc...@gmail.com>
Cc: Vitaly Cheptsov <vit9...@protonmail.com>
Fixes: d9ceedca6c8f ("Ext4Pkg: Add Ext4Dxe driver.")
Signed-off-by: Savva Mitrofanov <savva...@gmail.com>
---
Features/Ext4Pkg/Ext4Dxe/Superblock.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Features/Ext4Pkg/Ext4Dxe/Superblock.c
b/Features/Ext4Pkg/Ext4Dxe/Superblock.c
index 35dcf3c007c8..be3527e4d618 100644
--- a/Features/Ext4Pkg/Ext4Dxe/Superblock.c
+++ b/Features/Ext4Pkg/Ext4Dxe/Superblock.c
@@ -243,6 +243,11 @@ Ext4OpenSuperblock (
DEBUG ((DEBUG_FS, "Read only = %u\n", Partition->ReadOnly));
+ if (Sb->s_inodes_per_group == 0) {
+ DEBUG ((DEBUG_ERROR, "[ext4] Inodes per group can not be zero\n"));
+ return EFI_VOLUME_CORRUPTED;
+ }
+
Partition->BlockSize = (UINT32)LShiftU64 (1024, Sb->s_log_block_size);
// The size of a block group can also be calculated as 8 *
Partition->BlockSize
--
2.39.0
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