diff options
| -rw-r--r-- | io_uring/epoll.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/io_uring/epoll.c b/io_uring/epoll.c index b9db8bde27ec..eecd748cad01 100644 --- a/io_uring/epoll.c +++ b/io_uring/epoll.c @@ -62,6 +62,9 @@ int io_epoll_ctl(struct io_kiocb *req, unsigned int issue_flags) CLASS(fd, tf)(ie->fd); if (fd_empty(tf)) return -EBADF; + /* disallow adding an epoll context to another epoll context */ + if (ie->op == EPOLL_CTL_ADD && is_file_epoll(fd_file(tf))) + return -EINVAL; key.file = fd_file(tf); key.fd = ie->fd; |