f2fs: check upper bound of ino value in f2fs_nfs_get_inode

PATCH New Chao Yu 1 participant 1 message Mar 12, 2014

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VFS F2FS file system

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Chao Yu

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2014-03-12 09:08 UTC #0 lore raw

PATCH 1/1 f2fs: check upper bound of ino value in f2fs_nfs_get_inode

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 <[email protected]>

---
 fs/f2fs/super.c |    2 ++
 1 file changed, 2 insertions(+)

fs/f2fs/super.c +2 -0

index 6e4851c..3a51d7a 100644
@@ -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!

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