On Fri, Jan 27, 2023 at 9:29 AM Savva Mitrofanov <savva...@gmail.com> wrote:
>
> Missing EFI_OUT_OF_RESOURCES exit status on failed Ext4CreateDentry
> leads to NULL-pointer dereference in Ext4GetFileInfo (passing NULL
> buffer in Ext4ReadDir)
>
> Cc: Marvin Häuser <mhaeu...@posteo.de>
> Cc: Pedro Falcato <pedro.falc...@gmail.com>
> Cc: Vitaly Cheptsov <vit9...@protonmail.com>
> Fixes: 21b1853880d5 ("Ext4Pkg: Add a directory entry tree.")
> Signed-off-by: Savva Mitrofanov <savva...@gmail.com>
> ---
>  Features/Ext4Pkg/Ext4Dxe/Directory.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/Features/Ext4Pkg/Ext4Dxe/Directory.c 
> b/Features/Ext4Pkg/Ext4Dxe/Directory.c
> index 2e9a58a7e329..0753a20b5377 100644
> --- a/Features/Ext4Pkg/Ext4Dxe/Directory.c
> +++ b/Features/Ext4Pkg/Ext4Dxe/Directory.c
> @@ -267,7 +267,8 @@ Ext4OpenDirent (
>    } else {
>      File->Dentry = Ext4CreateDentry (FileName, Directory->Dentry);
>
> -    if (!File->Dentry) {
> +    if (File->Dentry == NULL) {
> +      Status = EFI_OUT_OF_RESOURCES;
>        goto Error;
>      }
>    }
> --
> 2.39.0
>

Reviewed-by: Pedro Falcato <pedro.falc...@gmail.com>

-- 
Pedro


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