Hi Sebastian, thanks for answering. On Wed, Feb 26 2025 at 17:31:58, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > Just to be clear: A problem exists in v6.6 independent of my doing and > 401cb7dae813 happens to fix it? The commit fecef4cd42c6 is a fixup for > 401cb7dae813. > > If so, can you share syzbot's reproducer and/or backtrace/ report? Actually, it's fecef4cd42c6 the one that fixes the issue, but 401cb7dae813 is needed for it to work: it implements the bpf_net_ctx_*() api, then fecef4cd42c6 uses bpf_net_ctx_set() and bpf_net_ctx_clear() in the tun driver. Here's the syzkaller report on stable v6.6: https://pastebin.com/yD0zVD0c and here's the C reproducer: https://pastebin.com/d415fUDU Cheers, Ricardo
