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To: Stephen Hemminger <stephen@networkplumber.org>,
Jakub Grajciar <jgrajcia@cisco.com>
Cc: dev@dpdk.org
References: <20201005123900.32723-1-jgrajcia@cisco.com>
<20201007080338.537949de@hermes.local>
From: Ferruh Yigit <ferruh.yigit@intel.com>
Message-ID: <ef535dc8-0a00-ca3c-5e08-a752c6bbb0f6@intel.com>
Date: Fri, 9 Oct 2020 16:09:11 +0100
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Subject: Re: [dpdk-dev] [PATCH] net/memif: use abstract socket address
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On 10/7/2020 4:03 PM, Stephen Hemminger wrote:
> On Mon, 5 Oct 2020 14:39:00 +0200
> Jakub Grajciar <jgrajcia@cisco.com> wrote:
>
>> @@ -886,7 +886,12 @@ memif_socket_create(char *key, uint8_t listener)
>> goto error;
>>
>> un.sun_family = AF_UNIX;
>> - strlcpy(un.sun_path, sock->filename, MEMIF_SOCKET_UN_SIZE);
>> + if (is_abstract) {
>> + // abstract address
> No C++ comments please.
>
>> + un.sun_path[0] = '\0';
> Already set to zero when initialized.
>
>> + if (pmd->flags & ETH_MEMIF_FLAG_SOCKET_ABSTRACT) {
>> + // abstract address
> ditto no C++ comments
>
>> + sun.sun_path[0] = '\0';
> again zeroed again
>
>> + memcpy(sun.sun_path + 1, pmd->socket_filename, sizeof(sun.sun_path) - 2);
>> + } else
>> + memcpy(sun.sun_path, pmd->socket_filename, sizeof(sun.sun_path) - 1);
>
> This code is buggy since it potentially reads past the end of the strinc in filename.
> Use strlcpy here instead.
>
Hi Jakub,
v2 is still using memcpy, have you seen Stephen's comment above?