crypto: x86/sm3 - fix possible crash with CFI enabled

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[ Upstream commit 8ba490d9f5 ]

sm3_transform_avx() is called via indirect function calls.  Therefore it
needs to use SYM_TYPED_FUNC_START instead of SYM_FUNC_START to cause its
type hash to be emitted when the kernel is built with
CONFIG_CFI_CLANG=y.  Otherwise, the code crashes with a CFI failure (if
the compiler didn't happen to optimize out the indirect call).

Fixes: ccace936ee ("x86: Add types to indirectly called assembly functions")
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Eric Biggers 2022-11-18 11:44:16 -08:00 • committed by Greg Kroah-Hartman

parent ae252643e8

commit e6e4e281be

1 changed files with 2 additions and 1 deletions

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arch/x86/crypto/sm3-avx-asm_64.S

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