crypto: arm64/sm3 - fix possible crash with CFI enabled
authorEric Biggers <ebiggers@google.com>
Fri, 18 Nov 2022 19:44:19 +0000 (11:44 -0800)
committerHerbert Xu <herbert@gondor.apana.org.au>
Fri, 25 Nov 2022 09:39:19 +0000 (17:39 +0800)
commitbe8f6b6496076588fd49cbe5bfaaf3ab883eb779
treed0af322a03c364e769ba78734d154fbec15e851e
parente5e1c67e2f01d924e9583b67a907934948d852aa
crypto: arm64/sm3 - fix possible crash with CFI enabled

sm3_neon_transform() 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: c50d32859e70 ("arm64: Add types to indirect 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>
arch/arm64/crypto/sm3-neon-core.S