netdev - Re: [PATCH net/bpf] bpf: add bpf_prog_run_data

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Message-Id: 
 <176314031800.1740925.6385057833740804551.git-patchwork-notify@kernel.org>
Date: Fri, 14 Nov 2025 17:11:58 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Eric Dumazet <edumazet@...gle.com>
Cc: ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
 davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
 netdev@...r.kernel.org, bpf@...r.kernel.org, horms@...nel.org,
 jhs@...atatu.com, victor@...atatu.com, xiyou.wangcong@...il.com,
 jiri@...nulli.us, toke@...hat.com, eric.dumazet@...il.com,
 syzkaller@...glegroups.com, paulb@...dia.com
Subject: Re: [PATCH net/bpf] bpf: add bpf_prog_run_data_pointers()

Hello:

This patch was applied to bpf/bpf.git (master)
by Martin KaFai Lau <martin.lau@...nel.org>:

On Wed, 12 Nov 2025 12:55:16 +0000 you wrote:
> syzbot found that cls_bpf_classify() is able to change
> tc_skb_cb(skb)->drop_reason triggering a warning in sk_skb_reason_drop().
> 
> WARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 __sk_skb_reason_drop net/core/skbuff.c:1189 [inline]
> WARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 sk_skb_reason_drop+0x76/0x170 net/core/skbuff.c:1214
> 
> struct tc_skb_cb has been added in commit ec624fe740b4 ("net/sched:
> Extend qdisc control block with tc control block"), which added a wrong
> interaction with db58ba459202 ("bpf: wire in data and data_end for
> cls_act_bpf").
> 
> [...]

Here is the summary with links:
  - [net/bpf] bpf: add bpf_prog_run_data_pointers()
    https://git.kernel.org/bpf/bpf/c/4ef927436258

You are awesome, thank you!
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