From: Davidlohr Bueso <dave@stgolabs.net>
To: jk@codeconstruct.com.au, matt@codeconstruct.com.au,
kuba@kernel.org, pabeni@redhat.com
Cc: anisa.su@samsung.com, dave@stgolabs.net, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] mctp: accept MSG_CMSG_COMPAT in recvmsg
Date: Sun, 1 Nov 2026 12:03:31 -0800 [thread overview]
Message-ID: <20261101200331.1956836-1-dave@stgolabs.net> (raw)
32-bit userspace running on a 64-bit kernel is unable to receive MCTP
messages on an AF_MCTP socket, even though sending succeeds. There is
nothing for MCTP to do with it beyond not rejecting it, as af_packet,
af_key and can/isotp already do, for example.
Fixes: 833ef3b91de6 ("mctp: Populate socket implementation")
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
---
net/mctp/af_mctp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mctp/af_mctp.c b/net/mctp/af_mctp.c
index 8af5e2b3c8d1..aa22c0860712 100644
--- a/net/mctp/af_mctp.c
+++ b/net/mctp/af_mctp.c
@@ -292,8 +292,7 @@ static int mctp_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
u8 type;
int rc;
- if (flags & ~(MSG_DONTWAIT | MSG_TRUNC | MSG_PEEK))
+ if (flags & ~(MSG_DONTWAIT | MSG_TRUNC | MSG_PEEK | MSG_CMSG_COMPAT))
return -EOPNOTSUPP;
skb = skb_recv_datagram(sk, flags, &rc);
--
2.39.5
next reply other threads:[~2026-11-01 20:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-01 20:03 Davidlohr Bueso [this message]
2026-11-01 20:09 ` netdev-bot+sinfo
2026-11-01 20:41 ` Davidlohr Bueso
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