crypto: x86/aegis128 - access 32-bit arguments as 32-bit

Browse source

Fix the AEGIS assembly code to access 'unsigned int' arguments as 32-bit
values instead of 64-bit, since the upper bits of the corresponding
64-bit registers are not guaranteed to be zero.

Note: there haven't been any reports of this bug actually causing
incorrect behavior.  Neither gcc nor clang guarantee zero-extension to
64 bits, but zero-extension is likely to happen in practice because most
instructions that operate on 32-bit registers zero-extend to 64 bits.

Fixes: 1d373d4e8e ("crypto: x86 - Add optimized AEGIS implementations")
Cc: stable@vger.kernel.org
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

...

This commit is contained in:

Eric Biggers 2024-10-16 17:00:42 -07:00 • committed by Herbert Xu

parent 16739efac6

commit 3b2f2d22fb

1 changed files with 15 additions and 14 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

29

arch/x86/crypto/aegis128-aesni-asm.S

View file