From: David Howells <dhowells@redhat.com>
Date: Thu, 16 Mar 2017 16:27:48 +0000 (+0000)
Subject: afs: Fix an off-by-one error in afs_send_pages()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=445783d0ec173a52bef2e9b129de7d716a19b9fa;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

afs: Fix an off-by-one error in afs_send_pages()

afs_send_pages() should only put the call into the AFS_CALL_AWAIT_REPLY
state if it has sent all the pages - but the check it makes is incorrect
and sometimes it will finish the loop early.

Signed-off-by: David Howells <dhowells@redhat.com>
---

diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 22d26b369070..b12da6aa5412 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -315,7 +315,7 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg)
 		 * packet as RxRPC might give us the reply before it
 		 * returns from sending the request.
 		 */
-		if (first + nr >= last)
+		if (first + nr - 1 >= last)
 			call->state = AFS_CALL_AWAIT_REPLY;
 		ret = rxrpc_kernel_send_data(afs_socket, call->rxcall,
 					     msg, bytes);