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Subject: Re: [PATCH] Bluetooth: hci_sock: Correctly bounds check and pad
 HCI_MON_NEW_INDEX name
From:   patchwork-bot+bluetooth@kernel.org
Message-Id: <169704602521.20012.6049823285233364562.git-patchwork-notify@kernel.org>
Date:   Wed, 11 Oct 2023 17:40:25 +0000
References: <20231011163140.work.317-kees@kernel.org>
In-Reply-To: <20231011163140.work.317-kees@kernel.org>
To:     Kees Cook <keescook@chromium.org>
Cc:     luiz.von.dentz@intel.com, twuufnxlz@gmail.com, marcel@holtmann.org,
        johan.hedberg@gmail.com, davem@davemloft.net, edumazet@google.com,
        kuba@kernel.org, pabeni@redhat.com,
        linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org,
        luiz.dentz@gmail.com, linux-kernel@vger.kernel.org,
        syzbot+c90849c50ed209d77689@syzkaller.appspotmail.com,
        linux-hardening@vger.kernel.org
Precedence: bulk

Hello:

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

On Wed, 11 Oct 2023 09:31:44 -0700 you wrote:
> The code pattern of memcpy(dst, src, strlen(src)) is almost always
> wrong. In this case it is wrong because it leaves memory uninitialized
> if it is less than sizeof(ni->name), and overflows ni->name when longer.
> 
> Normally strtomem_pad() could be used here, but since ni->name is a
> trailing array in struct hci_mon_new_index, compilers that don't support
> -fstrict-flex-arrays=3 can't tell how large this array is via
> __builtin_object_size(). Instead, open-code the helper and use sizeof()
> since it will work correctly.
> 
> [...]

Here is the summary with links:
  - Bluetooth: hci_sock: Correctly bounds check and pad HCI_MON_NEW_INDEX name
    https://git.kernel.org/bluetooth/bluetooth-next/c/fbd34cc57479

You are awesome, thank you!
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