[jdk17u-dev] RFR: 8292158: AES-CTR cipher state corruption with AVX-512

[Smita Kamath]

Hi,

This is a backport of JDK-8292158: AES-CTR cipher state corruption with AVX-512. This backport fixes a bug where cipher can become corrupted when encrypting/decrypting byte arrays with a size less than 16.
The fix is in MacroAssembler::aesctr_encrypt method.

Patch does not apply cleanly to 17u as the method has moved from src/hotspot/cpu/x86/macroAssembler_x86_aes.cpp to a new file src/hotspot/cpu/x86/stubGenerator_x86_64_aes.cpp. The included regression test also had to be modified.

Could you kindly review the patch?

Thanks,
Smita

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Commit messages:
 - Backport 9d76ac8a4453bc51d9dca2ad6c60259cfb2c4203

Changes: https://git.openjdk.org/jdk17u-dev/pull/787/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=787&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292158
  Stats: 99 lines in 2 files changed: 98 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/787.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/787/head:pull/787

PR: https://git.openjdk.org/jdk17u-dev/pull/787