From: Jakub Kicinski <kuba@kernel.org>
To: Prithvi <activprithvi@gmail.com>
Cc: andrii@kernel.org, socketcan@hartkopp.net, mkl@pengutronix.de,
linux-can@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com, netdev@vger.kernel.org
Subject: Re: [bpf, xdp] headroom - was: Re: Question about to KMSAN: uninit-value in can_receive
Date: Fri, 2 Jan 2026 12:04:05 -0800 [thread overview]
Message-ID: <20260102120405.34613b68@kernel.org> (raw)
In-Reply-To: <20260102153611.63wipdy2meh3ovel@inspiron>
On Fri, 2 Jan 2026 21:06:11 +0530 Prithvi wrote:
> Just a gentle ping on this thread
You're asking the wrong person, IIUC Andrii is tangentially involved
in XDP (via bpf links?):
XDP (eXpress Data Path)
M: Alexei Starovoitov <ast@kernel.org>
M: Daniel Borkmann <daniel@iogearbox.net>
M: David S. Miller <davem@davemloft.net>
M: Jakub Kicinski <kuba@kernel.org>
M: Jesper Dangaard Brouer <hawk@kernel.org>
M: John Fastabend <john.fastabend@gmail.com>
R: Stanislav Fomichev <sdf@fomichev.me>
L: netdev@vger.kernel.org
L: bpf@vger.kernel.org
Without looking too deeply - XDP has historically left the new space
uninitialized after push, expecting programs to immediately write the
headers in that space. syzbot had run into this in the past but I can't
find any references to past threads quickly :(
next prev parent reply other threads:[~2026-01-02 20:04 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-05 13:36 [syzbot] [can?] KMSAN: uninit-value in can_receive (3) syzbot
2025-11-17 17:30 ` Question about to KMSAN: uninit-value in can_receive Prithvi Tambewagh
2025-11-29 17:04 ` Oliver Hartkopp
2025-11-30 12:04 ` Feedback provided on question about " Prithvi Tambewagh
2025-11-30 12:44 ` Question about to " Oliver Hartkopp
2025-11-30 17:29 ` Prithvi Tambewagh
2025-11-30 19:09 ` Oliver Hartkopp
2025-12-07 18:45 ` Prithvi
2025-12-20 17:33 ` Prithvi
2025-12-21 18:29 ` [bpf, xdp] headroom - was: " Oliver Hartkopp
2025-12-21 19:06 ` Marc Kleine-Budde
2025-12-21 19:42 ` Oliver Hartkopp
2026-01-02 15:36 ` Prithvi
2026-01-02 20:04 ` Jakub Kicinski [this message]
2026-01-03 12:20 ` Oliver Hartkopp
2026-01-04 15:42 ` Jakub Kicinski
2026-01-05 13:47 ` Oliver Hartkopp
2026-01-05 23:26 ` Jakub Kicinski
2026-01-06 12:04 ` Oliver Hartkopp
2026-01-07 0:23 ` Jakub Kicinski
2026-01-07 15:34 ` Oliver Hartkopp
2026-01-07 19:10 ` Oliver Hartkopp
2026-01-08 15:17 ` Jakub Kicinski
2026-01-08 16:27 ` Oliver Hartkopp
2026-01-05 21:30 ` Andrii Nakryiko
2026-01-05 22:11 ` Daniel Borkmann
2025-11-28 17:48 ` Feedback on question about " Prithvi Tambewagh
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