On 6/15/24 9:59 AM, Alexei Starovoitov wrote:
On Sat, Jun 15, 2024 at 12:09 AM Zac Ecob <zacecob@xxxxxxxxxxxxxx> wrote:
I reduced the reproducer to the following:
Thank you for minimising the repro - I didn't think to do it myself. Apologies.
The verifier doesn't process the (s8) instruction correctly.
I took a further look out of curiosity and managed to properly crash the kernel. I think it might have security implications?
I haven't attached a repro for this because of such (though I could perhaps email it directly?).
Not sure how best to precede?
Pls focus your efforts on fixing the bug.
This is the fix: https://lore.kernel.org/bpf/20240615174621.3994321-1-yonghong.song@xxxxxxxxx/
Zac, could you test it in your environment?
