From 052897ca5019d9157ae09e5e84eee2a9ef5dccc6 Mon Sep 17 00:00:00 2001
From: "Gustavo F. Padovan" <padovan@profusion.mobi>
Date: Sat, 1 May 2010 16:15:40 -0300
Subject: [PATCH] Bluetooth: Check the SDU size against the MTU value
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If the SDU size is greater than the MTU something is wrong, so report
an error.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
[jprvita@profusion.mobi: set err to appropriate errno value]
Signed-off-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
---
net/bluetooth/l2cap.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 0889949b6896..e936913c921e 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -3338,6 +3338,11 @@ static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 co
pi->sdu_len = get_unaligned_le16(skb->data);
skb_pull(skb, 2);
+ if (pi->sdu_len > pi->imtu) {
+ err = -EMSGSIZE;
+ break;
+ }
+
pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC);
if (!pi->sdu) {
err = -ENOMEM;
--
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