bsdkm: misc cleanup.

[philljj]

Description

Some bsdkm cleanup. Fixes Fenrir issues, and tidies up some loose ends.

[Copilot]

Pull request overview

This PR performs small cleanup and correctness fixes in the FreeBSD kernel module (“bsdkm”) integration, aimed at addressing reported issues (Fenrir) and tightening teardown/cleanup behavior.

Changes:

• Add NULL-guard checks for the per-CPU FPU state array in x86 vector-register save/restore helpers.
• Adjust attach/detach error handling and add more explicit error logging in the crypto driver glue.
• Fix an AES-GCM self-test buffer initialization bug and zeroize additional sensitive state on exit paths.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
bsdkm/x86_vecreg.c	Adds fpu_states NULL checks in vecreg save/restore paths.
bsdkm/wolfkmod.c	Tweaks attach/detach cleanup/unregister flow; adds extra zeroization and error normalization in CBC/GCM work functions.
bsdkm/wolfkmod_aes.c	Fixes incorrect size used when clearing resultC2 in AES-GCM test.

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[github-actions]

MemBrowse Memory Report

gcc-arm-cortex-m4

• FLASH: .text +384 B (+0.2%, 197,934 B / 262,144 B, total: 76% used)
• RAM: .bss +8 B (+1.0%, 836 B / 65,536 B, total: 1% used)

gcc-arm-cortex-m4-baremetal

• FLASH: .text +832 B (+1.3%, 65,739 B / 262,144 B, total: 25% used)
• RAM: .bss +36 B (+5.6%, 680 B / 65,536 B, total: 1% used)

gcc-arm-cortex-m4-min-ecc

• FLASH: .text +384 B (+0.5%, 60,717 B / 262,144 B, total: 23% used)
• RAM: .bss +8 B (+1.2%, 676 B / 65,536 B, total: 1% used)

gcc-arm-cortex-m4-tls12

• FLASH: .text +320 B (+0.2%, 121,293 B / 262,144 B, total: 46% used)
• RAM: .bss +8 B (+1.0%, 816 B / 65,536 B, total: 1% used)
  No memory changes detected for:
• gcc-arm-cortex-m0plus
• gcc-arm-cortex-m3
• gcc-arm-cortex-m4-crypto-only
• gcc-arm-cortex-m4-dtls13
• gcc-arm-cortex-m4-openssl-compat
• gcc-arm-cortex-m4-pkcs7
• gcc-arm-cortex-m4-pq
• gcc-arm-cortex-m4-rsa-only
• gcc-arm-cortex-m4-sp-math
• gcc-arm-cortex-m4-tls13
• gcc-arm-cortex-m7
• gcc-arm-cortex-m7-pq
• gcc-arm-cortex-m7-tls13
• linuxkm-pie
• linuxkm-standard
• stm32-sim-stm32h753

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.