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[net,0/2,v2] net: bridge: vlan tunnel egress path fixes

Message ID 20210610120411.128339-1-razor@blackwall.org
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Series net: bridge: vlan tunnel egress path fixes | expand

Message

Nikolay Aleksandrov June 10, 2021, 12:04 p.m. UTC 
From: Nikolay Aleksandrov <nikolay@nvidia.com>

Hi,
These two fixes take care of tunnel_dst problems in the vlan tunnel egress
path. Patch 01 fixes a null ptr deref due to the lockless use of tunnel_dst
pointer without checking it first, and patch 02 fixes a use-after-free
issue due to wrong dst refcounting (dst_clone() -> dst_hold_safe()).

Both fix the same commit and should be queued for stable backports:
Fixes: 11538d039ac6 ("bridge: vlan dst_metadata hooks in ingress and egress paths")

v2: no changes, added stable list to CC

Thanks,
 Nik

Nikolay Aleksandrov (2):
  net: bridge: fix vlan tunnel dst null pointer dereference
  net: bridge: fix vlan tunnel dst refcnt when egressing

 net/bridge/br_private.h     |  4 ++--
 net/bridge/br_vlan_tunnel.c | 38 +++++++++++++++++++++++--------------
 2 files changed, 26 insertions(+), 16 deletions(-)