From: Jens Axboe <axboe@suse.de>
Date: Thu, 4 May 2006 07:13:49 +0000 (+0200)
Subject: [PATCH] compat_sys_vmsplice: one-off in UIO_MAXIOV check
X-Git-Tag: v2.6.17-rc4~44^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98232d504db0a1f91ecaa93686ed3bf61963103b;p=linux-2.6

[PATCH] compat_sys_vmsplice: one-off in UIO_MAXIOV check

nr_segs may not be > UIO_MAXIOV, however it may be equal to. This makes
the behaviour identical to the real sys_vmsplice(). The other foov
syscalls also agree that this is the way to go.

Signed-off-by: Jens Axboe <axboe@suse.de>
---

diff --git a/fs/compat.c b/fs/compat.c
index 3f3e8f4d43..970888aad8 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1323,7 +1323,7 @@ compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
 {
 	unsigned i;
 	struct iovec *iov;
-	if (nr_segs >= UIO_MAXIOV)
+	if (nr_segs > UIO_MAXIOV)
 		return -EINVAL;
 	iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
 	for (i = 0; i < nr_segs; i++) {