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authorriastradh <riastradh@NetBSD.org>2022-08-05 10:36:02 +0000
committerriastradh <riastradh@NetBSD.org>2022-08-05 10:36:02 +0000
commit1bfb199dffe9d5bc39265bdd34d9b43c4f0d0f11 (patch)
treede4f358ccf3f83a310276635995e8099c3595dbe /sys/fs
parent643e511fe6a9908e1a56c85413c71cfa0429c304 (diff)
ptyfs: Don't copy out cookies past end of buffer.
Reported-by: syzbot+2aae7c4eddc796f917e6@syzkaller.appspotmail.com https://syzkaller.appspot.com/bug?id=5fe24c1da952ac2ea498d745d6479bc6be91a751
Diffstat (limited to 'sys/fs')
-rw-r--r--sys/fs/ptyfs/ptyfs_vnops.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/sys/fs/ptyfs/ptyfs_vnops.c b/sys/fs/ptyfs/ptyfs_vnops.c
index 88efa4f6264..4219bcf346d 100644
--- a/sys/fs/ptyfs/ptyfs_vnops.c
+++ b/sys/fs/ptyfs/ptyfs_vnops.c
@@ -1,4 +1,4 @@
-/* $NetBSD: ptyfs_vnops.c,v 1.68 2021/12/08 20:11:54 andvar Exp $ */
+/* $NetBSD: ptyfs_vnops.c,v 1.69 2022/08/05 10:36:02 riastradh Exp $ */
/*
* Copyright (c) 1993, 1995
@@ -76,7 +76,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ptyfs_vnops.c,v 1.68 2021/12/08 20:11:54 andvar Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ptyfs_vnops.c,v 1.69 2022/08/05 10:36:02 riastradh Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -691,7 +691,7 @@ ptyfs_readdir(void *v)
*ap->a_cookies = cookies;
}
- for (; i < 2; i++) {
+ for (; i < 2 && uio->uio_resid >= UIO_MX; i++) {
/* `.' and/or `..' */
dp->d_fileno = PTYFS_FILENO(PTYFSroot, 0);
dp->d_namlen = i + 1;