linux-kernel - Re: [PATCH] Bluetooth: L2CAP: Fix u8 overflow

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Date:   Tue, 22 Nov 2022 00:50:15 +0000
From:   patchwork-bot+bluetooth@...nel.org
To:     Sungwoo Kim <iam@...g-woo.kim>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux-bluetooth@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Bluetooth: L2CAP: Fix u8 overflow

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@...el.com>:

On Fri, 18 Nov 2022 15:01:47 -0500 you wrote:
> By keep sending L2CAP_CONF_REQ packets, chan->num_conf_rsp increases
> multiple times and eventually it will wrap around the maximum number
> (i.e., 255).
> This patch prevents this by adding a boundary check with
> L2CAP_MAX_CONF_RSP
> 
> Btmon log:
> Bluetooth monitor ver 5.64
> = Note: Linux version 6.1.0-rc2 (x86_64)                               0.264594
> = Note: Bluetooth subsystem version 2.22                               0.264636
> @ MGMT Open: btmon (privileged) version 1.22                  {0x0001} 0.272191
> = New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0)          [hci0] 13.877604
> @ RAW Open: 9496 (privileged) version 2.22                   {0x0002} 13.890741
> = Open Index: 00:00:00:00:00:00                                [hci0] 13.900426
> (...)
> > ACL Data RX: Handle 200 flags 0x00 dlen 1033             #32 [hci0] 14.273106
>         invalid packet size (12 != 1033)
>         08 00 01 00 02 01 04 00 01 10 ff ff              ............
> > ACL Data RX: Handle 200 flags 0x00 dlen 1547             #33 [hci0] 14.273561
>         invalid packet size (14 != 1547)
>         0a 00 01 00 04 01 06 00 40 00 00 00 00 00        ........@.....
> > ACL Data RX: Handle 200 flags 0x00 dlen 2061             #34 [hci0] 14.274390
>         invalid packet size (16 != 2061)
>         0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04  ........@.......
> > ACL Data RX: Handle 200 flags 0x00 dlen 2061             #35 [hci0] 14.274932
>         invalid packet size (16 != 2061)
>         0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00  ........@.......
> = bluetoothd: Bluetooth daemon 5.43                                   14.401828
> > ACL Data RX: Handle 200 flags 0x00 dlen 1033             #36 [hci0] 14.275753
>         invalid packet size (12 != 1033)
>         08 00 01 00 04 01 04 00 40 00 00 00              ........@...
> 
> [...]

Here is the summary with links:
  - Bluetooth: L2CAP: Fix u8 overflow
    https://git.kernel.org/bluetooth/bluetooth-next/c/ae4569813a6e

You are awesome, thank you!
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