can: j1939: recvmsg(): allow MSG_CMSG_COMPAT flag
stable inclusion from stable-v5.10.181 commit b4b8294a41ca62d6a3daff24c3448ea51f8bc688 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8GJZJ Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b4b8294a41ca62d6a3daff24c3448ea51f8bc688 -------------------------------- commit 1db080cb upstream. The control message provided by J1939 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> Tested-by:
Oleksij Rempel <o.rempel@pengutronix.de> Acked-by:
Oleksij Rempel <o.rempel@pengutronix.de> Fixes: 9d71dd0c ("can: add support of SAE J1939 protocol") Link: https://lore.kernel.org/20230505110308.81087-3-mkl@pengutronix.de Cc: stable@vger.kernel.org Signed-off-by:
Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
sanglipeng <sanglipeng1@jd.com> (cherry picked from commit ea0c7561)
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