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crypto: arm64/aes-neonbs - fix crash with CFI enabled 

commit 47446d7cd4 upstream.

aesbs_ecb_encrypt(), aesbs_ecb_decrypt(), aesbs_xts_encrypt(), and
aesbs_xts_decrypt() are called via indirect function calls.  Therefore
they need to use SYM_TYPED_FUNC_START instead of SYM_FUNC_START to cause
their type hashes to be emitted when the kernel is built with
CONFIG_CFI_CLANG=y.  Otherwise, the code crashes with a CFI failure if
the compiler doesn't happen to optimize out the indirect calls.

Fixes: c50d32859e ("arm64: Add types to indirect called assembly functions")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eric Biggers 2023-02-26 22:32:23 -08:00 committed by Greg Kroah-Hartman
parent 4d9d2fd867
commit b952a9cf3d
1 changed files with 5 additions and 4 deletions
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9
arch/arm64/crypto/aes-neonbs-core.S
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@ -15,6 +15,7 @@
*/ */
#include <linux/linkage.h> #include <linux/linkage.h>
#include <linux/cfi_types.h>
#include <asm/assembler.h> #include <asm/assembler.h>
.text .text
@ -620,12 +621,12 @@ SYM_FUNC_END(aesbs_decrypt8)
.endm .endm
.align 4 .align 4
SYM_FUNC_START(aesbs_ecb_encrypt) SYM_TYPED_FUNC_START(aesbs_ecb_encrypt)
__ecb_crypt aesbs_encrypt8, v0, v1, v4, v6, v3, v7, v2, v5 __ecb_crypt aesbs_encrypt8, v0, v1, v4, v6, v3, v7, v2, v5
SYM_FUNC_END(aesbs_ecb_encrypt) SYM_FUNC_END(aesbs_ecb_encrypt)
.align 4 .align 4
SYM_FUNC_START(aesbs_ecb_decrypt) SYM_TYPED_FUNC_START(aesbs_ecb_decrypt)
__ecb_crypt aesbs_decrypt8, v0, v1, v6, v4, v2, v7, v3, v5 __ecb_crypt aesbs_decrypt8, v0, v1, v6, v4, v2, v7, v3, v5
SYM_FUNC_END(aesbs_ecb_decrypt) SYM_FUNC_END(aesbs_ecb_decrypt)
@ -799,11 +800,11 @@ SYM_FUNC_END(__xts_crypt8)
ret ret
.endm .endm
SYM_FUNC_START(aesbs_xts_encrypt) SYM_TYPED_FUNC_START(aesbs_xts_encrypt)
__xts_crypt aesbs_encrypt8, v0, v1, v4, v6, v3, v7, v2, v5 __xts_crypt aesbs_encrypt8, v0, v1, v4, v6, v3, v7, v2, v5
SYM_FUNC_END(aesbs_xts_encrypt) SYM_FUNC_END(aesbs_xts_encrypt)
SYM_FUNC_START(aesbs_xts_decrypt) SYM_TYPED_FUNC_START(aesbs_xts_decrypt)
__xts_crypt aesbs_decrypt8, v0, v1, v6, v4, v2, v7, v3, v5 __xts_crypt aesbs_decrypt8, v0, v1, v6, v4, v2, v7, v3, v5
SYM_FUNC_END(aesbs_xts_decrypt) SYM_FUNC_END(aesbs_xts_decrypt)