Re: [PATCH 4/5] net_sched: fix use of uninitialized ethertype variable in cls_flower

[David Miller]

From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Fri, 26 Aug 2016 17:25:45 +0200

> The addition of VLAN support caused a possible use of uninitialized
> data if we encounter a zero TCA_FLOWER_KEY_ETH_TYPE key, as pointed
> out by "gcc -Wmaybe-uninitialized":
> 
> net/sched/cls_flower.c: In function 'fl_change':
> net/sched/cls_flower.c:366:22: error: 'ethertype' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> This changes the code to only set the ethertype field if it
> was nonzero, as before the patch.
> 
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Fixes: 9399ae9a6cb2 ("net_sched: flower: Add vlan support")

Applied.