Re: [PATCH] ksmbd: validate the zero field of packet header

[Namjae Jeon]

2023-12-08 15:56 GMT+09:00, linan666@xxxxxxxxxxxxxxx <linan666@xxxxxxxxxxxxxxx>:
> From: Li Nan <linan122@xxxxxxxxxx>
>
> The SMB2 Protocol requires that "The first byte of the Direct TCP
> transport packet header MUST be zero (0x00)"[1]. Commit 1c1bcf2d3ea0
> ("ksmbd: validate smb request protocol id") removed the validation of
> this 1-byte zero. Add the validation back now.
>
> [1]: [MS-SMB2] - v20230227, page 30.
> https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-SMB2/%5bMS-SMB2%5d-230227.pdf
>
> Fixes: 1c1bcf2d3ea0 ("ksmbd: validate smb request protocol id")
> Signed-off-by: Li Nan <linan122@xxxxxxxxxx>
Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Applied it to #ksmbd-for-next-next.
Thanks for your patch!