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hostfs: Add a BUG_ON to detect behavior changes of dentry_path_raw()

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hostfs' __dentry_name() relies on the fact that dentry_path_raw() will place
the path name at the end of the provided buffer.
While this is okay, add a BUG_ON() to detect behavior changes as soon
as possible.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2015-03-03 23:41:52 +01:00
parent 41761ddfae
commit aad50b1e06
1 changed files with 7 additions and 0 deletions
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7
fs/hostfs/hostfs_kern.c
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@ -93,6 +93,13 @@ static char *__dentry_name(struct dentry *dentry, char *name)
__putname(name);
return NULL;
}
/*
* This function relies on the fact that dentry_path_raw() will place
* the path name at the end of the provided buffer.
*/
BUG_ON(p + strlen(p) + 1 != name + PATH_MAX);
strlcpy(name, root, PATH_MAX);
if (len > p - name) {
__putname(name);