linux-kernel - [PATCH] net/sctp: use memset avoid infoleaks

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Date:   Tue,  1 Mar 2022 08:18:55 +0000
From:   cgel.zte@...il.com
To:     vyasevich@...il.com
Cc:     nhorman@...driver.com, marcelo.leitner@...il.com,
        davem@...emloft.net, kuba@...nel.org, linux-sctp@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] net/sctp: use memset avoid infoleaks

From: Minghao Chi (CGEL ZTE) <chi.minghao@....com.cn>

Use memset to initialize structs to preventing infoleaks
in sctp_auth_chunk_verify

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@....com.cn>
---
 net/sctp/sm_statefuns.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index cc544a97c4af..7ff16d12e0c5 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -652,6 +652,7 @@ static bool sctp_auth_chunk_verify(struct net *net, struct sctp_chunk *chunk,
 		return false;
 
 	/* set-up our fake chunk so that we can process it */
+	memset(&auth, 0x0, sizeof(auth));
 	auth.skb = chunk->auth_chunk;
 	auth.asoc = chunk->asoc;
 	auth.sctp_hdr = chunk->sctp_hdr;
-- 
2.25.1