On Wed, 30 Dec 2020 18:38:15 +0800 wangyunjian wrote:
> From: Yunjian Wang <wangyunj...@huawei.com>
> 
> Currently pointer data is dereferenced when declaring addr before
> pointer data is null checked. This could lead to a null pointer
> dereference. Fix this by checking if pointer data is null first.
> 
> Fixes: 79cf79abce71 ("macvlan: add source mode")
> Signed-off-by: Yunjian Wang <wangyunj...@huawei.com>

I don't see it. All calls to macvlan_changelink_sources() are under 
if (data) { ... } so data is never NULL. Looks like we should rather
clean up macvlan_changelink_sources() to not check data for
MACVLAN_MACADDR_SET. 

WDYT?

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