[PATCH net] tun: Add missing bpf_net_ctx_clear() in do_xdp_generic()

Jakub Kicinski wrote:

On Fri, 26 Jul 2024 06:40:49 +0900 Jeongjun Park wrote:

quoted

There are cases where do_xdp_generic returns bpf_net_context without
clearing it. This causes various memory corruptions, so the missing
bpf_net_ctx_clear must be added.

Reported-by: syzbot+44623300f057a28baf1e@syzkaller.appspotmail.com
Fixes: fecef4cd42c6 ("tun: Assign missing bpf_net_context.")
Signed-off-by: Jeongjun Park <redacted>

Also likely:

Reported-by: syzbot+3c2b6d5d4bec3b904933@syzkaller.appspotmail.com
Reported-by: syzbot+707d98c8649695eaf329@syzkaller.appspotmail.com

Right?

Yes, both appear to be bugs with the same root cause.

Regards,
Jeongjun Park