# DF-3060 verification

Kernel: DragonFly dfbsd 6.5-DEVELOPMENT #0: Thu Jul 2 06:02:54 UTC 2026 root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64

Not executable: dirfs is dead code on this rig (see DF-3058) and the race as filed additionally requires a multi-CPU vkernel. The unlocked-walk analysis stands from source: dirfs_nresolve scans dm_fdlist under only the parent node lock (dirfs_vnops.c:171-181) while dirfs_node_setpassive mutates the list from paths holding other/no dirfs locks (dirfs_subr.c:812/:827).

## Kernel references
- sys/vfs/dirfs/dirfs_vnops.c:171
- sys/vfs/dirfs/dirfs_subr.c:812
- sys/vfs/dirfs/dirfs_subr.c:827

## Fix
See fix.diff.

## Fix status (batch validation)
Applied with the 36 sibling fix.diffs of this batch in findings/poc/_batch41/all_fixes.patch; single in-guest `make -j6 nativekernel KERNCONF=X86_64_GENERIC` completed RC=0 with zero errors under -Werror (full log: findings/poc/_batch41/fix_build8.log). Behavior A/B intentionally skipped for this Info-tier item.