Thread (22 messages) 22 messages, 6 authors, 2026-01-08

Re: [bpf, xdp] headroom - was: Re: Question about to KMSAN: uninit-value in can_receive

From: Jakub Kicinski <kuba@kernel.org>
Date: 2026-01-02 20:04:06
Also in: linux-can, lkml

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 [off-list ref]
M:	Daniel Borkmann [off-list ref]
M:	David S. Miller [off-list ref]
M:	Jakub Kicinski [off-list ref]
M:	Jesper Dangaard Brouer [off-list ref]
M:	John Fastabend [off-list ref]
R:	Stanislav Fomichev [off-list ref]
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 :(
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