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Bluetooth: bnep: Fix out-of-bound access 

This fixes attempting to access past ethhdr.h_source, although it seems
intentional to copy also the contents of h_proto this triggers
out-of-bound access problems with the likes of static analyzer, so this
instead just copy ETH_ALEN and then proceed to use put_unaligned to copy
h_proto separetely.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz 2024-02-28 12:11:08 -05:00
parent 79f4127a50
commit 0f0639b4d6
1 changed files with 2 additions and 1 deletions
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3
net/bluetooth/bnep/core.c
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@ -385,7 +385,8 @@ static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb)
case BNEP_COMPRESSED_DST_ONLY:
__skb_put_data(nskb, skb_mac_header(skb), ETH_ALEN);
__skb_put_data(nskb, s->eh.h_source, ETH_ALEN + 2);
__skb_put_data(nskb, s->eh.h_source, ETH_ALEN);
put_unaligned(s->eh.h_proto, (__be16 *)__skb_put(nskb, 2));
break;
case BNEP_GENERAL: