netdev - Re: [PATCH] mac802154: fix uninitialized security header fields

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Message-ID: <87o6n4xbp8.fsf@bootlin.com>
Date: Thu, 08 Jan 2026 18:21:07 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Kathara Sasikumar <katharasasikumar007@...il.com>
Cc: alex.aring@...il.com,  stefan@...enfreihafen.org,  davem@...emloft.net,
  edumazet@...gle.com,  kuba@...nel.org,  pabeni@...hat.com,
  horms@...nel.org,  linux-wpan@...r.kernel.org,  netdev@...r.kernel.org,
  linux-kernel@...r.kernel.org,  shuah@...nel.org,
  skhan@...uxfoundation.org,
  syzbot+60a66d44892b66b56545@...kaller.appspotmail.com
Subject: Re: [PATCH] mac802154: fix uninitialized security header fields

Hello,

On 14/12/2025 at 00:13:39 GMT, Kathara Sasikumar <katharasasikumar007@...il.com> wrote:

> KMSAN reported an uninitialized-value access in
> ieee802154_hdr_push_sechdr(). This happened because
> mac802154_set_header_security() allowed frames with cb->secen=1 but
> LLSEC disabled when secen_override=0, leaving parts of the security
> header uninitialized.
>
> Fix the validation so security-enabled frames are rejected whenever
> LLSEC is disabled, regardless of secen_override. Also clear the full
> header struct in the header creation functions to avoid partial
> initialization.
>
> Reported-by: syzbot+60a66d44892b66b56545@...kaller.appspotmail.com
> Tested-by: syzbot+60a66d44892b66b56545@...kaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=60a66d44892b66b56545
> Signed-off-by: Kathara Sasikumar <katharasasikumar007@...il.com>
> ---

For what I understand... :-)

Reviewed-by: Miquel Raynal <miquel.raynal@...tlin.com>

Thanks,
Miquèl