# DF-3014 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

Same 90-second stress rig as DF-3013 (writers + readdirs + reblock/prune). The double-finalize/blockmap accounting corruption path requires a btree EDEADLK precisely inside hammer_ip_sync_record_cursor for a HAMMER_MEM_RECORD_DATA record; not crossed under load. Code-verified race remains (hammer_object.c:1331-1335 blockmap_free on EDEADLK retry; finalize return unchecked at :1256).

## Kernel references
- sys/vfs/hammer/hammer_object.c:1256
- sys/vfs/hammer/hammer_object.c:1331
- sys/vfs/hammer/hammer_inode.c:1331

## 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.