mirror of https://gitee.com/openkylin/linux.git
ext4 crypto: enforce crypto policy restrictions on cross-renames
Thanks to Chao Yu <chao2.yu@samsung.com> for pointing out the need for this check. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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@ -3647,6 +3647,15 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
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u8 new_file_type;
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int retval;
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if ((ext4_encrypted_inode(old_dir) ||
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ext4_encrypted_inode(new_dir)) &&
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(old_dir != new_dir) &&
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(!ext4_is_child_context_consistent_with_parent(new_dir,
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old.inode) ||
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!ext4_is_child_context_consistent_with_parent(old_dir,
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new.inode)))
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return -EPERM;
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dquot_initialize(old.dir);
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dquot_initialize(new.dir);
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