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From 5d2be1422e02ccd697ccfcd45c85b4a26e6178e2 Mon Sep 17 00:00:00 2001
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From: Kangjie Lu <kangjielu@gmail.com>
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Date: Thu, 2 Jun 2016 04:04:56 -0400
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Subject: tipc: fix an infoleak in tipc_nl_compat_link_dump
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link_info.str is a char array of size 60. Memory after the NULL
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byte is not initialized. Sending the whole object out can cause
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a leak.
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Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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net/tipc/netlink_compat.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
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index f795b1d..3ad9fab 100644
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--- a/net/tipc/netlink_compat.c
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+++ b/net/tipc/netlink_compat.c
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@@ -604,7 +604,8 @@ static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
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link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
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link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
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- strcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME]));
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+ nla_strlcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME]),
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+ TIPC_MAX_LINK_NAME);
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return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
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&link_info, sizeof(link_info));
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--
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cgit v0.12
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