# DF-3382 on PATCHED kernel (fix.diff applied, #1: Fri Sep 11 22:24:51 UTC 2026)
# command: ifconfig tun0 create && /root/poc/t3382
[+] binding to tun0 (allocates 4096-byte buffers)
[+] destroying tun0 now (root, from shell helper)
[+] tun0 destroyed; bd_bif==NULL, bd_sbuf still allocated
t3382: BIOCSBLEN: Invalid argument           <- resize now rejected (bd_sbuf != NULL)
t3382-rc=1
# guest stayed up; identical PoC, baseline GPF (cache_nlookup_maybe_shared) GONE.