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Message-Id: <74f5a436ebf5c13ed89a81c47ba09a6549e385f6.1394035568.git.richardcochran@gmail.com> Date: Wed, 5 Mar 2014 17:10:52 +0100 From: Richard Cochran <richardcochran@...il.com> To: <linux-kernel@...r.kernel.org> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Eric Biederman <ebiederm@...ssion.com>, Tejun Heo <tj@...nel.org>, <stable@...r.kernel.org> Subject: [PATCH] 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@...il.com> Cc: <stable@...r.kernel.org> --- fs/kernfs/dir.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index bd6e18b..39c0143 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -37,7 +37,7 @@ 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; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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