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| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2023-04-06 13:08:45 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2023-05-15 22:24:46 +0200 |
| commit | db2773d65b02aed319a93efdfb958087771d4e19 (patch) | |
| tree | 0d2789b4e1bee2c75753fdbbdd663a94391cbab1 /net/can | |
| parent | df0acdc59b094cdaef19b1c8d83c9721082bab7b (diff) | |
| download | lwn-db2773d65b02aed319a93efdfb958087771d4e19.tar.gz lwn-db2773d65b02aed319a93efdfb958087771d4e19.zip | |
can: isotp: recvmsg(): allow MSG_CMSG_COMPAT flag
The control message provided by isotp support MSG_CMSG_COMPAT but
blocked recvmsg() syscalls that have set this flag, i.e. on 32bit user
space on 64 bit kernels.
Link: https://github.com/hartkopp/can-isotp/issues/59
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Suggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Fixes: 42bf50a1795a ("can: isotp: support MSG_TRUNC flag when reading from socket")
Link: https://lore.kernel.org/20230505110308.81087-2-mkl@pengutronix.de
Cc: stable@vger.kernel.org
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net/can')
| -rw-r--r-- | net/can/isotp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/can/isotp.c b/net/can/isotp.c index a750259cb79c..84f9aba02901 100644 --- a/net/can/isotp.c +++ b/net/can/isotp.c @@ -1139,7 +1139,7 @@ static int isotp_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, struct isotp_sock *so = isotp_sk(sk); int ret = 0; - if (flags & ~(MSG_DONTWAIT | MSG_TRUNC | MSG_PEEK)) + if (flags & ~(MSG_DONTWAIT | MSG_TRUNC | MSG_PEEK | MSG_CMSG_COMPAT)) return -EINVAL; if (!so->bound) |