Re: [PATCH] Bluetooth: RFCOMM: validate skb length in rfcomm_recv_frame

[email protected] Fri, 24 Jul 2026 19:00:10 +0000

Newsgroups	org.kernel.vger.linux-bluetooth,org.kernel.vger.linux-kernel
Message-ID	<178491961039.3273549.4096598946894620170.git-patchwork-notify@kernel.org>

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <[email protected]>:

On Wed, 22 Jul 2026 17:26:14 +0800 you wrote:
> rfcomm_recv_frame() casts skb->data to struct rfcomm_hdr and dereferences
> hdr->addr and hdr->ctrl without validating skb->len first. A truncated
> frame with skb->len less than the minimum header size causes an
> out-of-bounds read of uninitialized memory. Additionally, a zero-length
> frame causes skb->len-- to underflow to UINT_MAX, making
> skb_tail_pointer() read far past the buffer.
> 
> [...]

Here is the summary with links:
  - Bluetooth: RFCOMM: validate skb length in rfcomm_recv_frame
    https://git.kernel.org/bluetooth/bluetooth-next/c/4c7de7083a9a

You are awesome, thank you!
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