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 <richardcochran@gmail.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 8245d3b34894..0bd05ab26003 100644
--- 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;