The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 0145462fc802cd447ef5d029758043c7f15b4b1e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023041108-careless-semifinal-6234@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

0145462fc802 ("can: isotp: isotp_recvmsg(): use sock_recv_cmsgs() to get SOCK_RXQ_OVFL infos")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 0145462fc802cd447ef5d029758043c7f15b4b1e Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp socketcan@hartkopp.net Date: Thu, 30 Mar 2023 19:02:48 +0200 Subject: [PATCH] can: isotp: isotp_recvmsg(): use sock_recv_cmsgs() to get SOCK_RXQ_OVFL infos

isotp.c was still using sock_recv_timestamp() which does not provide control messages to detect dropped PDUs in the receive path.

Fixes: e057dd3fc20f ("can: add ISO 15765-2:2016 transport protocol") Signed-off-by: Oliver Hartkopp socketcan@hartkopp.net Link: https://lore.kernel.org/all/20230330170248.62342-1-socketcan@hartkopp.net Cc: stable@vger.kernel.org Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de

diff --git a/net/can/isotp.c b/net/can/isotp.c index 9bc344851704..47c2ebad10ed 100644 --- a/net/can/isotp.c +++ b/net/can/isotp.c @@ -1120,7 +1120,7 @@ static int isotp_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, if (ret < 0) goto out_err;

- sock_recv_timestamp(msg, sk, skb); + sock_recv_cmsgs(msg, sk, skb);

if (msg->msg_name) { __sockaddr_check_size(ISOTP_MIN_NAMELEN);