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
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 :(