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SubjectRe: [PATCH v2] scsi: fcoe: add missed kfree() in an error path
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On 2020/7/14 1:53, Ewan D. Milne wrote:
> See below.
>
> On Thu, 2020-07-09 at 20:05 +0800, Jing Xiangfeng wrote:
>> fcoe_fdmi_info() misses to call kfree() in an error path.
>> Add a label 'free_fdmi' and jump to it.
>>
>> Fixes: f07d46bbc9ba ("fcoe: Fix smatch warning in fcoe_fdmi_info
>> function")
>> Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
>> ---
>> drivers/scsi/fcoe/fcoe.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
>> index 25dae9f0b205..a63057a03772 100644
>> --- a/drivers/scsi/fcoe/fcoe.c
>> +++ b/drivers/scsi/fcoe/fcoe.c
>> @@ -830,7 +830,7 @@ static void fcoe_fdmi_info(struct fc_lport
>> *lport, struct net_device *netdev)
>> if (rc) {
>> printk(KERN_INFO "fcoe: Failed to retrieve FDMI
>> "
>> "information from netdev.\n");
>> - return;
>> + goto free_fdmi;
>> }
>>
>> snprintf(fc_host_serial_number(lport->host),
>> @@ -868,6 +868,7 @@ static void fcoe_fdmi_info(struct fc_lport
>> *lport, struct net_device *netdev)
>>
>> /* Enable FDMI lport states */
>> lport->fdmi_enabled = 1;
>> +free_fdmi:
>> kfree(fdmi);
>> } else {
>> lport->fdmi_enabled = 0;
>
> Normally I would like to see goto labels for error paths outside
> conditionals and at the end of the function.

I agree.

In this case it would
> seem to be cleaner to put an else { } clause in the if (rc) above
> around the snprintf() calls.

It is ok with me. v1 is also a simpler way.

+Hannes, Which is preferable?

Thanks

>
> -Ewan
>
> .
>

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