Hi Miguel,
On Mon, Jun 8, 2026 at 7:16 AM Miguel Ojeda miguel.ojeda.sandonis@gmail.com wrote:
On Mon, Jun 8, 2026 at 12:57 PM Jamal Hadi Salim jhs@mojatatu.com wrote:
I believe this bug slipped in during a small window but was fixed very quickly. Probably some fix never trickled to stable.
Yeah, as I mentioned above, I think commit a005fa5d7502 ("net/sched: act_mirred: Fix blockcast recursion bypass leading to stack overflow") is missing (at least).
I would suggest reviewing the entire chain to see what needs to be backported.
If you can point me to the exact tree where this happens i can take a look.
This is the 6.12.y -rc tree:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y
The stable kernel team puts the link to the repository at the top of the thread too:
https://lore.kernel.org/stable/20260607095727.647295505@linuxfoundation.org/
Still curious: So only the arm compiler catches this?
It likely gets caught by other arches too, i.e. I just happened to catch it in my arm64 build.
This is Clang, not GCC, by the way.
I think it was too early AM here when i was looking at this. The answer was right there all along in what you said: The missing piece is commit a005fa5d7502
cheers, jamal
I hope this helps!
Cheers, Miguel