[f2fs-dev] [PATCH] f2fs: check upper bound of ino value in f2fs_nfs_get_inode

[Chao Yu]

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 <chao2.yu@xxxxxxxxxxx>
---
 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

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