linux-kernel - Forwarded: [PATCH] crypto: adiantum: initialize rbuf.bignum to fix KMSAN uninit-value bug

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Message-ID: <6941e2c1.a70a0220.25eec0.000b.GAE@google.com>
Date: Tue, 16 Dec 2025 14:52:49 -0800
From: syzbot <syzbot+703d8a2cd20971854b06@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Forwarded: [PATCH] crypto: adiantum: initialize rbuf.bignum to fix
 KMSAN uninit-value bug

For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com.

***

Subject: [PATCH] crypto: adiantum: initialize rbuf.bignum to fix KMSAN uninit-value bug
Author: katharasasikumar007@...il.com

Signed-off-by: Kathara Sasikumar <katharasasikumar007@...il.com>

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
---
 crypto/adiantum.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crypto/adiantum.c b/crypto/adiantum.c
index a6bca877c3c7..0803451fdbb7 100644
--- a/crypto/adiantum.c
+++ b/crypto/adiantum.c
@@ -350,6 +350,7 @@ static int adiantum_crypt(struct skcipher_request *req, bool enc)
 	if (req->cryptlen < BLOCKCIPHER_BLOCK_SIZE)
 		return -EINVAL;
 
+	memset(&rctx->rbuf.bignum, 0, sizeof(rctx->rbuf.bignum));
 	rctx->enc = enc;
 
 	/*
-- 
2.51.0