linux-kernel - [PATCH] crypto: wp512: disable kmsan checks in wp512_process

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Date:   Thu, 15 Dec 2022 17:29:38 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: wp512: disable kmsan checks in wp512_process_buffer()

From: Arnd Bergmann <arnd@...db.de>

The memory sanitizer causes excessive register spills in this function:

crypto/wp512.c:782:13: error: stack frame size (2104) exceeds limit (2048) in 'wp512_process_buffer' [-Werror,-Wframe-larger-than]

Assume that this one is safe, and mark it as needing no checks to
get the stack usage back down to the normal level.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 crypto/wp512.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/wp512.c b/crypto/wp512.c
index 5e820afa3c78..07994e5ebf4e 100644
--- a/crypto/wp512.c
+++ b/crypto/wp512.c
@@ -779,7 +779,7 @@ static const u64 rc[WHIRLPOOL_ROUNDS] = {
  * The core Whirlpool transform.
  */
 
-static void wp512_process_buffer(struct wp512_ctx *wctx) {
+static __no_kmsan_checks void wp512_process_buffer(struct wp512_ctx *wctx) {
 	int i, r;
 	u64 K[8];        /* the round key */
 	u64 block[8];    /* mu(buffer) */
-- 
2.35.1