netdev - [PATCH v2 net 0/2] net: fix potential crash in net/sched/cls

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Message-ID: <20260128141539.3404400-1-edumazet@google.com>
Date: Wed, 28 Jan 2026 14:15:37 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: Simon Horman <horms@...nel.org>, GangMin Kim <km.kim1503@...il.com>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH v2 net 0/2] net: fix potential crash in net/sched/cls_u32.c

GangMin Kim provided a report and a repro fooling u32_classify().

Add skb_header_pointer_careful() variant of skb_header_pointer()
and use it in net/sched/cls_u32.c.

Later we can also use it in net/sched/act_pedit.c

Eric Dumazet (2):
  net: add skb_header_pointer_careful() helper
  net/sched: cls_u32: use skb_header_pointer_careful()

 include/linux/skbuff.h | 12 ++++++++++++
 net/sched/cls_u32.c    | 13 ++++++-------
 2 files changed, 18 insertions(+), 7 deletions(-)

-- 
2.52.0.457.g6b5491de43-goog