Re: [PATCH v2] net: ipv4: Avoid bounds check warning

[David Ahern]

On 5/26/22 4:12 AM, zhanggenjian wrote:
> From: huhai <huhai@xxxxxxxxxx>
> 
> Fix the following build warning when CONFIG_IPV6 is not set:
> 
> In function ‘fortify_memcpy_chk’,
>     inlined from ‘tcp_md5_do_add’ at net/ipv4/tcp_ipv4.c:1210:2:
> ./include/linux/fortify-string.h:328:4: error: call to ‘__write_overflow_field’ declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]
>   328 |    __write_overflow_field(p_size_field, size);
>       |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Suggested-by: Paolo Abeni <pabeni@xxxxxxxxxx>
> Signed-off-by: huhai <huhai@xxxxxxxxxx>
> ---
>  net/ipv4/tcp_ipv4.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>