Commit f6ac55b6 authored Oct 27, 2010 by Sanchit Garg Committed by Eric Van Hensbergen Oct 28, 2010

net/9p: Return error on read with NULL buffer

This patch ensures that a read(fd, NULL, 10) returns EFAULT on a 9p file.

Signed-off-by: Sanchit Garg <sancgarg@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

parent b165d601

net/9p/client.c

+1 −4

Original line number	Diff line number	Diff line
		@@ -1286,16 +1286,13 @@ p9_client_read(struct p9_fid fid, char data, char __user *udata, u64 offset,

		if (data) {
		memmove(data, dataptr, count);
		}

		if (udata) {
		} else {
		err = copy_to_user(udata, dataptr, count);
		if (err) {
		err = -EFAULT;
		goto free_and_error;
		}
		}

		p9_free_req(clnt, req);
		return count;