Re: [PATCH] Bluetooth: L2CAP: validate connectionless PSM length

[patchwork-bot+bluetooth]

Hello:

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

On Mon,  8 Jun 2026 23:57:05 +0000 you wrote:
> Connectionless L2CAP frames carry a two-byte PSM at the start of the
> payload.  l2cap_recv_frame() currently reads that PSM unconditionally
> after validating only the outer L2CAP length.
> 
> A malformed connectionless frame with a zero- or one-byte payload can
> therefore make the parser read beyond the advertised skb payload and use
> tailroom bytes as part of the PSM.  A VHCI-backed QEMU reproducer
> injected a one-byte connectionless payload and reached the unchecked
> read.
> 
> [...]

Here is the summary with links:
  - Bluetooth: L2CAP: validate connectionless PSM length
    https://git.kernel.org/bluetooth/bluetooth-next/c/801f756504d1

You are awesome, thank you!
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