From: Pavel Begunkov <asml.silence@xxxxxxxxx>
commit 681fda8d27a66f7e65ff7f2d200d7635e64a8d05 upstream.
io_recvmsg() doesn't free memory allocated for struct io_buffer. This can
causes a leak when used with automatic buffer selection.
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/io_uring.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3884,10 +3884,16 @@ static int io_recvmsg(struct io_kiocb *r
ret = __sys_recvmsg_sock(sock, &kmsg->msg, req->sr_msg.msg,
kmsg->uaddr, flags);
- if (force_nonblock && ret == -EAGAIN)
- return io_setup_async_msg(req, kmsg);
+ if (force_nonblock && ret == -EAGAIN) {
+ ret = io_setup_async_msg(req, kmsg);
+ if (ret != -EAGAIN)
+ kfree(kbuf);
+ return ret;
+ }
if (ret == -ERESTARTSYS)
ret = -EINTR;
+ if (kbuf)
+ kfree(kbuf);
}
if (kmsg && kmsg->iov != kmsg->fast_iov)
