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fix(kernel): a GPT disk with a bad header, or an unreadable first block, is not used

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The increment 2 final review's minors 1-4 (Captain Bob, 2026-10-27: "fix 1-4"):
1. A protective MBR with no "EFI PART" header is GPT_BAD, not GPT_NONE: the
   MBR says it is a GPT disk, and a GPT disk is never attached whole.
2. A disk whose block 0 cannot be read is GPT_EIO: "GPT: a USB drive could
   not be read -- not used", nothing attached (it was read raw, attached
   whole, and a raw Zuse drive behind it logged her in).
3. The entry array's LBA is checked against the disk's size directly.
4. gpt_bad_entries: the entry array changed, the header valid -- refused.
Harness modes gpt_no_header, gpt_read_error (blkdebug EIO on sector 0),
gpt_bad_entries. The plan carries the amendment.

Red (amd64): gpt_no_header 070335, gpt_read_error 070717 FAIL;
gpt_bad_entries 070048 PASS (existing check, now pinned). Green: every GPT
mode on amd64 071113-072933; gpt_zuse, gpt_read_error, gpt_no_header on
aarch64 073222-074047 and riscv64 074526-075535; the identity gate's and
increment 1's sessions 080036-082345, emergency 083130 (082635 was run
without EMERGENCY_CONSOLE_ENABLED=1 -- a harness invocation error).
Accepted: suite EXIT 0; 093121, 093352, 093750, POST 538/538, dict_hash
0xfec8c47cfc6f437f; test-32, 0 failures.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
rajames
2026-10-27 12:17:00 -04:00
co-authored by Claude Opus 5.5
parent f612bb37a9
commit 2e71f7aa0d
65 changed files with 4910 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files
logs/20261027-080956/amd64/qemu-amd64-20261027-080956.log
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View File
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[=3hBdsDxe: loading Boot0002 "UEFI QEMU DVD-ROM QM00005 " from PciRoot(0x0)/Pci(0x1F,0x2)/Sata(0x2,0xFFFF,0x0)
BdsDxe: starting Boot0002 "UEFI QEMU DVD-ROM QM00005 " from PciRoot(0x0)/Pci(0x1F,0x2)/Sata(0x2,0xFFFF,0x0)
[=3hStarKernel UEFI Loader
Loading kernel from ESP...
[CKPT 001] Entered efi_main - ConOut live
RAW SERIAL UP
[CKPT 002] Serial (COM1) initialized
Monolithic build - kernel linked directly
Collecting boot information...
CmdLine: parsed OK
[CKPT 004] Command line parsed
[CKPT 005] Kernel stack allocation decided
[CKPT 006] Boot info collected (ACPI table located)
GOP: linear framebuffer found
[CKPT 007] GOP: linear framebuffer found
[CKPT 008] About to enter ExitBootServices retry loop
EBS...
EBS OK
Calling kernel_main (monolithic)...
_____ _ _ __ _
/ ____| | | |/ / | |
| (___ | |_ __ _ _ __| ' / ___ _ __ _ __ ___| |
\___ \| __/ _` | '__| < / _ \ '__| '_ \ / _ \ |
____) | || (_| | | | . \ __/ | | | | | __/ |
|_____/ \__\__,_|_| |_|\_\___|_| |_| |_|\___|_|
LithosAnanke v2.1.0 amd64
Architecture: amd64
Build: Oct 27 2026 08:09:29
UEFI BootServices: EXITED
Console: serial line is a 16550 at port 0x00000000000003f8 (COM1, probed)
=== StarKernel Boot Information ===
Memory map entries: 131
Total memory: 1023 MB
Usable memory: 966 MB
===================================
PMM initialized.
PMM statistics:
Total pages: 248676
Free pages : 247153
Used pages : 1523
Total MB : 971
Free MB : 965
Used MB : 5
VMM initialized (mapped RAM, CR3 switched)
VMM initialized (mapped RAM, CR3 switched)
VMM self-test: mapped OK at 0xffff800000000000
VMM self-test complete.
IDT installed.
APIC: init...
APIC: IA32_APIC_BASE MSR=0x00000000fee00900
APIC: stale-ISR drain: 0 EOI(s) issued
APIC: initialized (xAPIC MMIO, TPR=0, SIVR=0x1FF, EOI-clear)
APIC: init done
I/O APIC: init...
I/O APIC: base=0xfec00000, gsi_base=0, overrides=5
override: source=00 gsi=2 flags=0x0000
override: source=05 gsi=5 flags=0x000d
override: source=09 gsi=9 flags=0x000d
override: source=0a gsi=10 flags=0x000d
override: source=0b gsi=11 flags=0x000d
i8042: keyboard ACKed enable-scanning
i8042: IRQ1 enabled in controller config byte
I/O APIC: keyboard IRQ1 routed (masked)
Timer: init...
Timer: init start
Timer: PM_TMR_BLK discovered from FADT at port 1544
Timer: VM mode detected (hypervisor present).
Timer: HPET calibration disabled (VM-exit MMIO would poison timing).
Timer: WARNING: invariant TSC not present under hypervisor.
Timer: continuing in RELATIVE mode (no determinism guarantees).
Timer: RDTSCP not present; using RDTSC (less serialized).
Timer: CPUID frequency unavailable; trying PM Timer...
Timer: trust=1 (0=NONE,1=REL,2=ABS), TSC=2096730084 Hz
Timer: init done
Kernel heap initialized.
Heap statistics:
Total bytes: 536870872
Free bytes: 536870872
Used bytes: 0
Peak bytes: 0
Heap base addr: 24641536
Heap end addr: 561512448
Heartbeat: init...
APIC Timer: calibrating...
APIC Timer: apic_hz=1004668940, tick_hz=100, initial_count=10046689
APIC Timer: configured (masked, ready to start)
Heartbeat: init done
Kernel initialization complete.
Boot successful!
System: StarForth v4 (this build's default)
StarForth v4: one host node, the F18-derived engine
V4: capsule v4:sys:map-64.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:map-64.f18 capsule_hash=0x949eb6a1e9260e49
V4: capsule v4:sys:core.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:core.f18 capsule_hash=0xb8f167892ec18c28
V4: capsule v4:sys:input.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:input.f18 capsule_hash=0x85d3ec486d929a79
V4: capsule v4:sys:dict.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:dict.f18 capsule_hash=0x1379bd3b5de811dc
V4: capsule v4:sys:codegen.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:codegen.f18 capsule_hash=0x36d2ae84d2911b90
V4: capsule v4:sys:compile.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:compile.f18 capsule_hash=0x11145c4c2ab819d8
V4: capsule v4:sys:quit.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:quit.f18 capsule_hash=0x43cadf3b21ddbf3e
V4: capsule v4:sys:forth.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:forth.f18 capsule_hash=0x16cab4a1268b85da
V4: capsule v4:sys:numout.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:numout.f18 capsule_hash=0x85a240ad3fb2b299
V4: capsule v4:sys:words.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:words.f18 capsule_hash=0xb1d381f927d9f14e
V4: capsule v4:sys:system.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:system.f18 capsule_hash=0xd92203664c2915bd
V4: capsule v4:sys:qmath.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:qmath.f18 capsule_hash=0xdb4140713dd857f3
V4: capsule v4:sys:blocks.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:blocks.f18 capsule_hash=0x76307ef48678dc2a
V4: capsule v4:sys:log.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:log.f18 capsule_hash=0xfc6540e6b824a52b
V4: capsule v4:sys:acl.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:acl.f18 capsule_hash=0x6845aa048db7eb22
V4: capsule v4:sys:end.f18 signature: missing (unsigned)
PARITY:V4_F18 name=v4:sys:end.f18 capsule_hash=0x5ef01312c07b79cc
PARITY:V4_ROM words=2372 rom_hash=0x87b23d3ae2643c8d instructions=59145258
V4: capsule v4:forth79.4th signature: missing (unsigned)
PARITY:V4_CAPSULE name=v4:forth79.4th capsule_id=0x4055641ee17d176b capsule_hash=0x4055641ee17d176b dict_hash=0x033e1c05c09a1df8
PARITY:V4_POST tests=538 pass=538 fail=0
PARITY:V4_SYSTEM word_count=317 dict_hash=0xfec8c47cfc6f437f
PARITY:OK
POST: PASSED
PCI: init...
PCI: ECAM mapped (amd64)
virtio-blk: found device
Artemis: virtio-blk attached
virtio-input: no device on PCI bus 0
Starting heartbeat...
APIC Timer: started (LVT=0x00020020 ICR=10046689)
I/O APIC: keyboard IRQ1 unmasked
Heartbeat running.
blkio_usb: MSC device ready
[Hera] Zuse: identity confirmed from attached thumbdrive
[zuse@Hera] ok> 3 4 + .
[zuse@Hera] 7 ok
[Hera] Zuse: session ended -- reattach to re-authenticate