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| author | Eric Biggers <ebiggers@google.com> | 2022-11-18 22:44:15 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2022-11-25 12:39:19 +0300 |
| commit | a1d72fa33186ac69c7d8120c71f41ea4fc23dcc9 (patch) | |
| tree | 22a43e77cade37fe6fb12f7f9bb9e29522f5f61f /arch/x86/crypto/sha512-avx2-asm.S | |
| parent | 19940ebbb59c12146d05c5f8acd873197b290648 (diff) | |
| download | linux-a1d72fa33186ac69c7d8120c71f41ea4fc23dcc9.tar.xz | |
crypto: x86/sha512 - fix possible crash with CFI enabled
sha512_transform_ssse3(), sha512_transform_avx(), and
sha512_transform_rorx() 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 didn't happen to optimize out the indirect
calls).
Fixes: ccace936eec7 ("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>
Diffstat (limited to 'arch/x86/crypto/sha512-avx2-asm.S')
| -rw-r--r-- | arch/x86/crypto/sha512-avx2-asm.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/crypto/sha512-avx2-asm.S b/arch/x86/crypto/sha512-avx2-asm.S index 5cdaab7d6901..b1ca99055ef9 100644 --- a/arch/x86/crypto/sha512-avx2-asm.S +++ b/arch/x86/crypto/sha512-avx2-asm.S @@ -50,6 +50,7 @@ ######################################################################## #include <linux/linkage.h> +#include <linux/cfi_types.h> .text @@ -565,7 +566,7 @@ frame_size = frame_CTX + CTX_SIZE # of SHA512 message blocks. # "blocks" is the message length in SHA512 blocks ######################################################################## -SYM_FUNC_START(sha512_transform_rorx) +SYM_TYPED_FUNC_START(sha512_transform_rorx) # Save GPRs push %rbx push %r12 |