== DF-2375 baseline (ACHARNESS + ssdt_acsim BAT0, 32-char no-NUL oeminfo) ==
BIF unit=0 model='SIMMODEL' serial='SIMSER' type='LION' oeminfo[32]=''
oeminfo is 0 chars -- the 32-char _BIF string NEVER lands in bif.oeminfo
  (acpi_PkgStr E2BIG at acpi_package.c:84-86: ++length 33 > size 32)
ACSIM: poison: 6 chunks of 164 bytes sprayed with 0x41 and freed
ACSIM: check: kmalloc(164) bytes at +164: 00 00 00 00 00 00 00 00
  (no OOB byte-164 write; clean_str precondition unreachable)
== 0xFF-prefilled user ioctl buffer ==
identical: kernel bzero at acpi_battery.c:400 wipes user data first
VERDICT: false positive at runtime; latent off-by-one retained as hardening