Re: [PATCH bluetooth] Bluetooth: qca: fix NVM tag length underflow in TLV parser

[Johan Hovold <johan@kernel.org>]

On Tue, Jul 07, 2026 at 10:55:23AM -0700, Xiang Mei wrote:
> On Sun, Jul 5, 2026 at 2:41 AM Johan Hovold <johan@kernel.org> wrote:
> > On Sat, Jul 04, 2026 at 04:10:30PM -0700, Xiang Mei wrote:

> > > The loop body
> > > then reads a 12-byte struct tlv_type_nvm past the end of the short
> > > vmalloc'd firmware buffer (and the EDL_TAG_ID_* handlers can write past it).
> >
> > No, only four bytes are read before the loop exits without any further
> > consequences due to the following check:

> Thanks Johan, and you're right. Only the 2-byte tag_id (and at most
> the 4 bytes of tag_id/tag_len) is read out of bounds. This commit
> message overstated the impact, and I should have caught that.
> 
> Unfortunately, the bot merged this patch when I was preparing the v2
> this morning. If you think the inaccurate commit message is worth
> fixing on record, I can send a follow-up to the maintainers to correct
> the message

It was Luiz who applied the patch -- perhaps he did not notice my
conditional Reviewed-by tag.

I assume the Bluetooth tree is not rebased so I don't think there's
anything that can be done here and there is no need to send a v2 (unless
Luiz says otherwise).

> > With the commit message fixed you can add my:
> >
> > Reviewed-by: Johan Hovold <johan@kernel.org>

Johan