net: hsr: Fix potential use-after-free
authorYueHaibing <yuehaibing@huawei.com>
Fri, 25 Nov 2022 07:57:24 +0000 (15:57 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 8 Dec 2022 10:28:41 +0000 (11:28 +0100)
commitdca370e575d9b6c983f5015e8dc035e23e219ee6
treece55a426bfd8d69edcbd337997d44c4be34ee3a9
parent1daec0815655e110c6f206c5e777a4af8168ff58
net: hsr: Fix potential use-after-free

[ Upstream commit 7e177d32442b7ed08a9fa61b61724abc548cb248 ]

The skb is delivered to netif_rx() which may free it, after calling this,
dereferencing skb may trigger use-after-free.

Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20221125075724.27912-1-yuehaibing@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
net/hsr/hsr_forward.c