kernfs: fix off by one error.

The hash values 0 and 1 are reserved for magic directory entries, but the code only prevents names hashing to 0. This patch fixes the test to also prevent hash value 1. Signed-off-by: Richard Cochran <[email protected]> Cc: <[email protected]> Reviewed-by: "Eric W. Biederman" <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
josf · Mar 9, 2014 · 88391d4 · 88391d4
1 parent 13df797
commit 88391d4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
@@ -190,7 +190,7 @@ static unsigned int kernfs_name_hash(const char *name, const void *ns)
 	hash = (end_name_hash(hash) ^ hash_ptr((void *)ns, 31));
 	hash &= 0x7fffffffU;
 	/* Reserve hash numbers 0, 1 and INT_MAX for magic directory entries */
-	if (hash < 1)
+	if (hash < 2)
 		hash += 2;
 	if (hash >= INT_MAX)
 		hash = INT_MAX - 1;