This is a note to let you know that I've just added the patch titled
crypto: x86/sm3 - 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-sm3-fix-possible-crash-with-cfi-enabled.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 88af6ee8e47b744adf2ba02130566f35411283c7
Author: Eric Biggers <ebiggers@xxxxxxxxxx>
Date: Fri Nov 18 11:44:16 2022 -0800
crypto: x86/sm3 - fix possible crash with CFI enabled
[ Upstream commit 8ba490d9f5a56f52091644325a32d3f71a982776 ]
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: 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/sm3-avx-asm_64.S b/arch/x86/crypto/sm3-avx-asm_64.S
index b12b9efb5ec5..8fc5ac681fd6 100644
--- a/arch/x86/crypto/sm3-avx-asm_64.S
+++ b/arch/x86/crypto/sm3-avx-asm_64.S
@@ -12,6 +12,7 @@
*/
#include <linux/linkage.h>
+#include <linux/cfi_types.h>
#include <asm/frame.h>
/* Context structure */
@@ -328,7 +329,7 @@
* const u8 *data, int nblocks);
*/
.align 16
-SYM_FUNC_START(sm3_transform_avx)
+SYM_TYPED_FUNC_START(sm3_transform_avx)
/* input:
* %rdi: ctx, CTX
* %rsi: data (64*nblks bytes)
