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fs/ntfs3: Fix root inode checking

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Separate checking inode->i_op and inode itself.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/202302162319.bDJOuyfy-lkp@intel.com/
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2023-02-20 09:39:35 +04:00
parent e43f6ec224
commit 788ee1605c
No known key found for this signature in database
GPG Key ID: A9B0331F832407B6
1 changed files with 10 additions and 1 deletions
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11
fs/ntfs3/super.c
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@ -1347,12 +1347,21 @@ load_root:
ref.low = cpu_to_le32(MFT_REC_ROOT); ref.low = cpu_to_le32(MFT_REC_ROOT);
ref.seq = cpu_to_le16(MFT_REC_ROOT); ref.seq = cpu_to_le16(MFT_REC_ROOT);
inode = ntfs_iget5(sb, &ref, &NAME_ROOT); inode = ntfs_iget5(sb, &ref, &NAME_ROOT);
if (IS_ERR(inode) || !inode->i_op) { if (IS_ERR(inode)) {
err = PTR_ERR(inode); err = PTR_ERR(inode);
ntfs_err(sb, "Failed to load root (%d).", err); ntfs_err(sb, "Failed to load root (%d).", err);
goto out; goto out;
} }
/*
* Final check. Looks like this case should never occurs.
*/
if (!inode->i_op) {
err = -EINVAL;
ntfs_err(sb, "Failed to load root (%d).", err);
goto put_inode_out;
}
sb->s_root = d_make_root(inode); sb->s_root = d_make_root(inode);
if (!sb->s_root) { if (!sb->s_root) {
err = -ENOMEM; err = -ENOMEM;