From: Chao Yu Subject: [f2fs-dev] [PATCH] f2fs: check upper bound of ino value in f2fs_nfs_get_inode Date: Wed, 12 Mar 2014 17:08:36 +0800 Message-ID: <001601cf3dd2$c17795a0$4466c0e0$@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Content-language: zh-cn Sender: linux-kernel-owner@vger.kernel.org To: ??? Cc: linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-f2fs-devel.lists.sourceforge.net Upper bound checking of ino should be added to f2fs_nfs_get_inode, so unneeded process before do_read_inode in f2fs_iget could be avoided when ino is invalid. Signed-off-by: Chao Yu --- fs/f2fs/super.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 6e4851c..3a51d7a 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -644,6 +644,8 @@ static struct inode *f2fs_nfs_get_inode(struct super_block *sb, if (unlikely(ino < F2FS_ROOT_INO(sbi))) return ERR_PTR(-ESTALE); + if (unlikely(ino >= NM_I(sbi)->max_nid)) + return ERR_PTR(-ESTALE); /* * f2fs_iget isn't quite right if the inode is currently unallocated! -- 1.7.9.5