From b959ca328d306fb9af676b64720fea8a847da570 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Tue, 27 Sep 2022 21:40:38 +0000
Subject: arp: don't leak data in the padding of arp replies

---
 sys/src/9/ip/ethermedium.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'sys/src')

diff --git a/sys/src/9/ip/ethermedium.c b/sys/src/9/ip/ethermedium.c
index 8a2a50899..19cc65eb7 100644
--- a/sys/src/9/ip/ethermedium.c
+++ b/sys/src/9/ip/ethermedium.c
@@ -586,7 +586,7 @@ recvarp(Ipifc *ifc)
 			n = ifc->mintu;
 		rbp = allocb(n);
 		r = (Etherarp*)rbp->rp;
-		memset(r, 0, sizeof(Etherarp));
+		memset(r, 0, n);
 		hnputs(r->type, ETARP);
 		hnputs(r->hrd, 1);
 		hnputs(r->pro, ETIP4);
-- 
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