From: Breno Leitao <leitao@debian.org>
To: "Nikola Z. Ivanov" <zlatistiv@gmail.com>
Cc: kuba@kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net,
edumazet@google.com, pabeni@redhat.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net] netdevsim: Initialize all fields of ip header when building dummy sk_buff
Date: Tue, 21 Apr 2026 02:12:31 -0700 [thread overview]
Message-ID: <aec-UcPm5pRZjcSL@gmail.com> (raw)
In-Reply-To: <9ce273bd-6912-4442-8672-4c89bebf32ed@gmail.com>
On Tue, Apr 21, 2026 at 11:54:19AM +0300, Nikola Z. Ivanov wrote:
> On 4/21/26 11:19 AM, Breno Leitao wrote:
> > On Tue, Apr 21, 2026 at 10:37:38AM +0300, Nikola Z. Ivanov wrote:
> > >
> > > Closes: https://syzkaller.appspot.com/bug?extid=23d7fcd204e3837866ff
> >
> > How do you check in the report above that the missig un-initialized
> > fields are "tos" and "id"?
>
> I don't think it is visible here, my guess would
> be because the checksum calculator walks the
> header in small chunks instead of referencing
> its fields.
>
> The whole "KMSAN: uninit-value in irqentry_exit_to_kernel_mode_preempt"
> doesn't really sound quite right.
That's precisely my question - how does this fix relate to that specific
report?
Were you able to reproduce the KMSAN report?
Thanks for the quick answer,
--breno
next prev parent reply other threads:[~2026-04-21 9:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-21 7:37 [PATCH net] netdevsim: Initialize all fields of ip header when building dummy sk_buff Nikola Z. Ivanov
2026-04-21 8:19 ` Breno Leitao
2026-04-21 8:54 ` Nikola Z. Ivanov
2026-04-21 9:12 ` Breno Leitao [this message]
2026-04-21 11:44 ` Nikola Z. Ivanov
2026-04-21 15:20 ` Jakub Kicinski
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