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tipc: fix an infoleak in tipc_nl_compat_link_dump

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[ Upstream commit 5d2be1422e ]

link_info.str is a char array of size 60. Memory after the NULL
byte is not initialized. Sending the whole object out can cause
a leak.

Signed-off-by: Kangjie Lu <kjlu@gatech.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kangjie Lu
2016-07-14 15:02:06 +01:00
committed by Greg Kroah-Hartman
parent cfd6e7fe43
commit 5fb7161192
1 changed files with 2 additions and 1 deletions
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3
net/tipc/netlink_compat.c
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@@ -574,7 +574,8 @@ static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
strcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME]));
nla_strlcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME]),
TIPC_MAX_LINK_NAME);
return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
&link_info, sizeof(link_info));