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commit f3fe182ffe35f829986445b17bb7793858d1408b Author: zhangbo56 <[email protected]> AuthorDate: Sun Jan 26 18:41:08 2025 +0800 net/rpmsg: Fix a race condition in poll Not only in poll_setup, ept callback will also call poll_notify, which may cause a all zero revents returned to user space. Fix it by holding a mutex. Signed-off-by: zhangbo56 <[email protected]> --- net/rpmsg/rpmsg_sockif.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/rpmsg/rpmsg_sockif.c b/net/rpmsg/rpmsg_sockif.c index b23422fdc92..69b4d1457bc 100644 --- a/net/rpmsg/rpmsg_sockif.c +++ b/net/rpmsg/rpmsg_sockif.c @@ -983,7 +983,9 @@ static int rpmsg_socket_poll(FAR struct socket *psock, } } + nxmutex_lock(&conn->polllock); poll_notify(&fds, 1, eventset); + nxmutex_unlock(&conn->polllock); } else {
