This is a note to let you know that I've just added the patch titled crypto: x86/sha512 - fix possible crash with CFI enabled to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: crypto-x86-sha512-fix-possible-crash-with-cfi-enable.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit e9a7d0e9487a7375d0164dc139dbc44f0f55fd4f Author: Eric Biggers <ebiggers@xxxxxxxxxx> Date: Fri Nov 18 11:44:15 2022 -0800 crypto: x86/sha512 - fix possible crash with CFI enabled [ Upstream commit a1d72fa33186ac69c7d8120c71f41ea4fc23dcc9 ] 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@xxxxxxxxxxxxx> Reviewed-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/arch/x86/crypto/sha512-avx-asm.S b/arch/x86/crypto/sha512-avx-asm.S index 1fefe6dd3a9e..b0984f19fdb4 100644 --- a/arch/x86/crypto/sha512-avx-asm.S +++ b/arch/x86/crypto/sha512-avx-asm.S @@ -48,6 +48,7 @@ ######################################################################## #include <linux/linkage.h> +#include <linux/cfi_types.h> .text @@ -273,7 +274,7 @@ frame_size = frame_WK + WK_SIZE # of SHA512 message blocks. # "blocks" is the message length in SHA512 blocks ######################################################################## -SYM_FUNC_START(sha512_transform_avx) +SYM_TYPED_FUNC_START(sha512_transform_avx) test msglen, msglen je nowork 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 diff --git a/arch/x86/crypto/sha512-ssse3-asm.S b/arch/x86/crypto/sha512-ssse3-asm.S index b84c22e06c5f..c06afb5270e5 100644 --- a/arch/x86/crypto/sha512-ssse3-asm.S +++ b/arch/x86/crypto/sha512-ssse3-asm.S @@ -48,6 +48,7 @@ ######################################################################## #include <linux/linkage.h> +#include <linux/cfi_types.h> .text @@ -274,7 +275,7 @@ frame_size = frame_WK + WK_SIZE # of SHA512 message blocks. # "blocks" is the message length in SHA512 blocks. ######################################################################## -SYM_FUNC_START(sha512_transform_ssse3) +SYM_TYPED_FUNC_START(sha512_transform_ssse3) test msglen, msglen je nowork