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f2fs: check lower bound nid value in check_nid_range 

This patch add lower bound verification for nid in check_nid_range, so nids
reserved like 0, node, meta passed by caller could be checked there.

And then check_nid_range could be used in f2fs_nfs_get_inode for simplifying
code.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
hifive-unleashed-5.1
Chao Yu 2014-06-12 13:23:41 +08:00 committed by Jaegeuk Kim
parent 8bc6f60e3f
commit d6b7d4b31d
3 changed files with 4 additions and 4 deletions
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3
fs/f2fs/f2fs.h
View File

@ -641,7 +641,8 @@ static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi)
*/
static inline int check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
{
WARN_ON((nid >= NM_I(sbi)->max_nid));
if (unlikely(nid < F2FS_ROOT_INO(sbi)))
return -EINVAL;
if (unlikely(nid >= NM_I(sbi)->max_nid))
return -EINVAL;
return 0;

1
fs/f2fs/inode.c
View File

@ -78,6 +78,7 @@ static int do_read_inode(struct inode *inode)
if (check_nid_range(sbi, inode->i_ino)) {
f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
(unsigned long) inode->i_ino);
WARN_ON(1);
return -EINVAL;
}

4
fs/f2fs/super.c
View File

@ -689,9 +689,7 @@ static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *inode;
if (unlikely(ino < F2FS_ROOT_INO(sbi)))
return ERR_PTR(-ESTALE);
if (unlikely(ino >= NM_I(sbi)->max_nid))
if (check_nid_range(sbi, ino))
return ERR_PTR(-ESTALE);
/*