Re: [PATCH net] RDS: Check cmsg_len before dereferencing CMSG_DATA

[David Miller]

From: Avinash Repaka <avinash.repaka@xxxxxxxxxx>
Date: Thu, 21 Dec 2017 20:17:04 -0800

> RDS currently doesn't check if the length of the control message is
> large enough to hold the required data, before dereferencing the control
> message data. This results in following crash:
 ...
> To fix this, we verify that the cmsg_len is large enough to hold the
> data to be read, before proceeding further.
> 
> Reported-by: syzbot <syzkaller-bugs@xxxxxxxxxxxxxxxx>
> Signed-off-by: Avinash Repaka <avinash.repaka@xxxxxxxxxx>

Applied and queued up for -stable, thanks.