Superblock s_inodes_per_group field can't be zero, it leads to division by zero in BlockGroup routine Ext4ReadInode
Cc: Marvin Häuser <[email protected]> Cc: Pedro Falcato <[email protected]> Cc: Vitaly Cheptsov <[email protected]> Fixes: d9ceedca6c8f ("Ext4Pkg: Add Ext4Dxe driver.") Signed-off-by: Savva Mitrofanov <[email protected]> Reviewed-by: Pedro Falcato <[email protected]> Reviewed-by: Marvin Häuser <[email protected]> --- 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 -- 2.39.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#99449): https://edk2.groups.io/g/devel/message/99449 Mute This Topic: https://groups.io/mt/96697368/21656 Group Owner: [email protected] Unsubscribe: https://edk2.groups.io/g/devel/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
