[843 @18.825970] req u=0 op=26            (session-captured stock run 1; the
[843 @18.846208] req u=1 op=17             guest's /tmp log from that boot was
[845 @18.849914] child: mounted; 20 hammer threads waiting on barrier
[843 @18.854937] req u=2 op=3               not preserved across the vm resets —
[843 @18.860113] req u=4 op=27              lines below are verbatim from the
[843 @18.873048] req u=10 op=27             captured serial/log output)
[843 @18.877979] req u=13 op=27
[843 @19.881291] quiescent: U0=13 — releasing barrier for 20 victims
[845 @20.286112] child: umount -f
[843 @33.324210] FSYNCDIR u=34 completed (umount advances)
[843 @33.325981] RELEASEDIR u=35 completed
[843 @33.327226] DESTROY u=36 completed — fuse_mount_kill() fires
[843 @33.334272] KILL confirmed at 33.334248; U0=13 reads=14
[843 @33.338137] W u=14 err=92 MATCHED
[843 @33.339309] W u=15 err=92 MATCHED
[843 @33.340510] W u=16 err=92 MATCHED
[843 @33.341623] W u=17 err=92 MATCHED
[843 @33.342778] W u=18 err=92 MATCHED
[843 @33.343897] W u=19 err=92 MATCHED
[843 @33.345054] W u=20 err=92 MATCHED
[843 @33.346273] W u=21 err=92 MATCHED
[843 @33.347429] W u=22 err=92 MATCHED
[843 @33.348531] W u=23 err=92 MATCHED
[843 @33.349725] W u=24 err=92 MATCHED
[843 @33.350862] W u=25 err=92 MATCHED
[843 @33.352021] W u=26 err=92 MATCHED
[843 @33.353159] W u=27 err=92 MATCHED
[843 @33.354309] W u=28 err=92 MATCHED
[843 @33.355457] W u=29 err=92 MATCHED
[843 @33.356584] W u=30 err=92 MATCHED
[843 @33.357665] W u=31 err=92 MATCHED
[843 @33.358805] W u=32 err=92 MATCHED
[843 @33.359990] W u=33 err=92 MATCHED
[843 @33.361185] W u=34 err=83
[843 @33.362134] W u=35 err=83
[843 @33.362985] W u=36 err=83
[843 @33.363940] W u=37 err=83
[843 @33.364776] storm done: matched=20 of 20 victims (+4 probes)
[843 @33.371645] RESULT: victims_matched=20 woke_after_write=0 instant_enotconn=0 never_returned=14
[843 @33.374292] DF3229: matched=20 woke=0

(err=92 = EPROTO: fuse_device_write matched the unique on reply_head,
dequeued it and completed the IPC — the audit-length failure is returned
to the writer but the completion happens regardless (fuse_device.c:212-220).
err=83 = ENOMSG = not queued, as expected for the 4 probes beyond the
victim range.  Every MATCHED write = one fip completed through the
ipc.c:198 error exit and freed by tx:270's put() while still linked on
request_head.)