=== DF-0879 PoC run on FIXED kernel (6.5-DEVELOPMENT #1, with CE depth bound) ===
kern.version: DragonFly 6.5-DEVELOPMENT #1: Sat Jul 11 21:30:15 UTC 2026
sha256(kernel) = 9a92f0f12573088b7a798744f04ef7d2eeed5fddb7e160660716a55eba6e670c

=== Run 1 ===
VN=vn4
--- mount attempt on FIXED kernel #1 ---
MOUNT_RC=0
--- guest still alive? ---
 9:38PM  up 50 secs, 0 users, load averages: 0.11, 0.04, 0.01
--- cleanup ---
FIX_TEST_DONE

=== Run 2 ===
VN=vn4
--- mount attempt on FIXED kernel ---
MOUNT_RC=0
 9:38PM  up 1 min, 0 users, load averages: 0.09, 0.04, 0.01
RUN_2_DONE

=== Run 3 ===
VN=vn4
--- mount attempt on FIXED kernel ---
MOUNT_RC=0
 9:38PM  up 1 min, 0 users, load averages: 0.09, 0.04, 0.01
RUN_3_DONE

=== RESULT: Fix WORKS. mount_cd9660 returns promptly (RC=0) on all 3 runs.  ===
=== The CE depth bound (ISO_RRIP_MAX_CE_DEPTH=100) breaks the cyclic chain  ===
=== after 100 iterations. Guest remains fully responsive. No hang, no DoS.    ===