linux-kernel - Re: [PATCH net v3] net/sched: Fix UAF when resolving a clash

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Message-Id: 
 <172069322959.11889.7076340448823741973.git-patchwork-notify@kernel.org>
Date: Thu, 11 Jul 2024 10:20:29 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Chengen Du <chengen.du@...onical.com>
Cc: jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 ozsh@...dia.com, paulb@...dia.com, marcelo.leitner@...il.com,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 gerald.yang@...onical.com
Subject: Re: [PATCH net v3] net/sched: Fix UAF when resolving a clash

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@...hat.com>:

On Wed, 10 Jul 2024 13:37:47 +0800 you wrote:
> KASAN reports the following UAF:
> 
>  BUG: KASAN: slab-use-after-free in tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct]
>  Read of size 1 at addr ffff888c07603600 by task handler130/6469
> 
>  Call Trace:
>   <IRQ>
>   dump_stack_lvl+0x48/0x70
>   print_address_description.constprop.0+0x33/0x3d0
>   print_report+0xc0/0x2b0
>   kasan_report+0xd0/0x120
>   __asan_load1+0x6c/0x80
>   tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct]
>   tcf_ct_act+0x886/0x1350 [act_ct]
>   tcf_action_exec+0xf8/0x1f0
>   fl_classify+0x355/0x360 [cls_flower]
>   __tcf_classify+0x1fd/0x330
>   tcf_classify+0x21c/0x3c0
>   sch_handle_ingress.constprop.0+0x2c5/0x500
>   __netif_receive_skb_core.constprop.0+0xb25/0x1510
>   __netif_receive_skb_list_core+0x220/0x4c0
>   netif_receive_skb_list_internal+0x446/0x620
>   napi_complete_done+0x157/0x3d0
>   gro_cell_poll+0xcf/0x100
>   __napi_poll+0x65/0x310
>   net_rx_action+0x30c/0x5c0
>   __do_softirq+0x14f/0x491
>   __irq_exit_rcu+0x82/0xc0
>   irq_exit_rcu+0xe/0x20
>   common_interrupt+0xa1/0xb0
>   </IRQ>
>   <TASK>
>   asm_common_interrupt+0x27/0x40
> 
> [...]

Here is the summary with links:
  - [net,v3] net/sched: Fix UAF when resolving a clash
    https://git.kernel.org/netdev/net/c/26488172b029

You are awesome, thank you!
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