netdev - Re: [PATCH][next] 6lowpan: fix off-by-one comparison of index id with LOWPAN_IPHC_CTX_TABLE

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Message-ID: <f09c07d6-9a16-3acf-dd07-4b7bfcd732f3@canonical.com>
Date:   Sun, 7 Jul 2019 00:23:07 +0100
From:   Colin Ian King <colin.king@...onical.com>
To:     Marcel Holtmann <marcel@...tmann.org>
Cc:     Alexander Aring <alex.aring@...il.com>,
        Jukka Rissanen <jukka.rissanen@...ux.intel.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-bluetooth@...r.kernel.org, linux-wpan@...r.kernel.org,
        netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] 6lowpan: fix off-by-one comparison of index id with
 LOWPAN_IPHC_CTX_TABLE_SIZE

On 06/07/2019 11:51, Marcel Holtmann wrote:
> Hi Colin,
> 
>> The WARN_ON_ONCE check on id is off-by-one, it should be greater or equal
>> to LOWPAN_IPHC_CTX_TABLE_SIZE and not greater than. Fix this.
>>
>> Signed-off-by: Colin Ian King <colin.king@...onical.com>
>> ---
>> net/6lowpan/debugfs.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/net/6lowpan/debugfs.c b/net/6lowpan/debugfs.c
>> index 1c140af06d52..a510bed8165b 100644
>> --- a/net/6lowpan/debugfs.c
>> +++ b/net/6lowpan/debugfs.c
>> @@ -170,7 +170,7 @@ static void lowpan_dev_debugfs_ctx_init(struct net_device *dev,
>> 	struct dentry *root;
>> 	char buf[32];
>>
>> -	WARN_ON_ONCE(id > LOWPAN_IPHC_CTX_TABLE_SIZE);
>> +	WARN_ON_ONCE(id >= LOWPAN_IPHC_CTX_TABLE_SIZE);
> 
> this patch no longer applied cleanly to bluetooth-next. Can you send me an updated version.

I'm confused by this, I just applied it OK on bluetooth-next [1] on the
head 9ce67c3235be71e8cf922a9b3d0b7359ed3f4ce5, am I applying this to the
wrong repo/branch?

[1]
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git


Colin

> 
> Regards
> 
> Marcel
>