linux-kernel - Re: [PATCH] net/bridge: replace simple

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Message-ID: <f98615d9-a129-d0b0-e444-cb649c14d7ce@nvidia.com>
Date:   Mon, 22 Nov 2021 12:17:39 +0200
From:   Nikolay Aleksandrov <nikolay@...dia.com>
To:     Ido Schimmel <idosch@...sch.org>, Bernard Zhao <bernard@...o.com>
Cc:     Roopa Prabhu <roopa@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        bridge@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/bridge: replace simple_strtoul to kstrtol

On 22/11/2021 12:04, Ido Schimmel wrote:
> On Thu, Nov 18, 2021 at 06:06:42PM -0800, Bernard Zhao wrote:
>> simple_strtoull is obsolete, use kstrtol instead.
>>
>> Signed-off-by: Bernard Zhao <bernard@...o.com>
>> ---
>>  net/bridge/br_sysfs_br.c | 7 +++----
>>  1 file changed, 3 insertions(+), 4 deletions(-)
>>
>> diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
>> index d9a89ddd0331..11c490694296 100644
>> --- a/net/bridge/br_sysfs_br.c
>> +++ b/net/bridge/br_sysfs_br.c
>> @@ -36,15 +36,14 @@ static ssize_t store_bridge_parm(struct device *d,
>>  	struct net_bridge *br = to_bridge(d);
>>  	struct netlink_ext_ack extack = {0};
>>  	unsigned long val;
>> -	char *endp;
>>  	int err;
>>  
>>  	if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
>>  		return -EPERM;
>>  
>> -	val = simple_strtoul(buf, &endp, 0);
>> -	if (endp == buf)
>> -		return -EINVAL;
>> +	err = kstrtoul(buf, 10, &val);
> 
> Base 16 is valid.
> 
> Before this patch:
> 
> # ip link add name br0 type bridge vlan_filtering 1
> # echo "0x88a8" > /sys/class/net/br0/bridge/vlan_protocol
> # echo $?
> 0
> 
> After this patch:
> 
> # ip link add name br0 type bridge vlan_filtering 1
> # echo "0x88a8" > /sys/class/net/br0/bridge/vlan_protocol 
> bash: echo: write error: Invalid argument
> 

Good catch, Bernard please send a revert. Thanks.