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fix hostfs_open() use of ->f_path.dentry
this is one of the cases where we need to use d_real() - we are using more than the name of dentry here. ->d_sb is used as well, so in case of hostfs being used as a layer we get the wrong superblock. Reported-by: Johannes Berg <johannes@sipsolutions.net> Tested-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -315,7 +315,7 @@ static int hostfs_open(struct inode *ino, struct file *file)
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if (mode & FMODE_WRITE)
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r = w = 1;
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name = dentry_name(file->f_path.dentry);
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name = dentry_name(d_real(file->f_path.dentry, file->f_inode));
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if (name == NULL)
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return -ENOMEM;
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