v0.25.7: BU40N firmware wedge fix in do_handshake

Pre-0.25.7 the AACS authenticate loop fired up to 16 host-cert
attempts back-to-back with no pause. Each attempt is 5-10 SCSI
REPORT_KEY/SEND_KEY exchanges, so on a disc whose host cert isn't
in our KEYDB (or one the drive rejects), the drive saw 80-160 SCSI
commands in a few hundred ms and entered a fast-fail firmware
wedge state where every subsequent CDB returns sense 05/24 until
power-cycled.

Three defences:
- MAX_CERT_ATTEMPTS capped at 3 (was 16)
- 1-second sleep between attempts
- Bail immediately on any sense_key == 0x05 (ILLEGAL_REQUEST) so
  the loop can't deepen the wedge if a regression undoes the
  attempt cap.

This commit is contained in:

MattJackson

2026-05-19 21:18:45 -07:00

parent 5f1028a62a

commit 739a276a39

3 changed files with 70 additions and 4 deletions

									
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				[package]

				name = "libfreemkv"

				version = "0.25.6"

				version = "0.25.7"

				edition = "2024"

				rust-version = "1.86"

				license = "AGPL-3.0-only"