linux-kernel - Forwarded: [PATCH] crypto: adiantum: initialize rbuf.bignum to avoid KMSAN warning

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <693ded1c.050a0220.326d2b.0009.GAE@google.com>
Date: Sat, 13 Dec 2025 14:47:56 -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 avoid
 KMSAN warning

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 avoid KMSAN warning
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 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/crypto/adiantum.c b/crypto/adiantum.c
index a6bca877c3c7..edd53c793fda 100644
--- a/crypto/adiantum.c
+++ b/crypto/adiantum.c
@@ -310,6 +310,7 @@ static int adiantum_finish(struct skcipher_request *req)
 			return err;
 		}
 		le128_sub(&rctx->rbuf.bignum, &rctx->rbuf.bignum, &digest);
+		memset(&rctx->rbuf.bignum, 0, sizeof(rctx->rbuf.bignum));
 		memcpy(virt + bulk_len, &rctx->rbuf.bignum, sizeof(le128));
 		flush_dcache_page(page);
 		kunmap_local(virt);
@@ -370,6 +371,7 @@ static int adiantum_crypt(struct skcipher_request *req, bool enc)
 	} else {
 		/* Slow path that works for any source scatterlist */
 		err = adiantum_hash_message(req, src, src_nents, &digest);
+		memset(&rctx->rbuf.bignum, 0, sizeof(rctx->rbuf.bignum));
 		scatterwalk_map_and_copy(&rctx->rbuf.bignum, src,
 					 bulk_len, sizeof(le128), 0);
 	}
-- 
2.51.0