Commit 990a4de5 authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring/net: ensure compat import handlers clear free_iov 



If we're not allocating the vectors because the count is below
UIO_FASTIOV, we still do need to properly clear ->free_iov to prevent
an erronous free of on-stack data.

Reported-by: default avatarJiri Slaby <jirislaby@gmail.com>
Fixes: 4c17a496 ("io_uring/net: fix cleanup double free free_iov init")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 35d90f95

io_uring/net.c

+1 −0
Original line number Diff line number Diff line
@@ -494,6 +494,7 @@ static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req, 
	if (req->flags & REQ_F_BUFFER_SELECT) {

		compat_ssize_t clen;



		iomsg->free_iov = NULL;

		if (msg.msg_iovlen == 0) {

			sr->len = 0;

		} else if (msg.msg_iovlen > 1) {