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| author | Joonwoo Park <joonwpark81@gmail.com> | 2008-04-01 06:02:47 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-01 06:02:47 +0200 |
| commit | f83f1768f833cb45bc93429fdc552252a4f55ac3 (patch) | |
| tree | 15de7d2df2fc3a35e0a6b933bb37aefcba2cc3ef /net/llc/llc_s_ac.c | |
| parent | [IP] UDP: Use SEQ_START_TOKEN. (diff) | |
| download | linux-f83f1768f833cb45bc93429fdc552252a4f55ac3.tar.xz linux-f83f1768f833cb45bc93429fdc552252a4f55ac3.zip | |
[LLC]: skb allocation size for responses
Allocate the skb for llc responses with the received packet size by
using the size adjustable llc_frame_alloc.
Don't allocate useless extra payload.
Cleanup magic numbers.
So, this fixes oops.
Reported by Jim Westfall:
kernel: skb_over_panic: text:c0541fc7 len:1000 put:997 head:c166ac00 data:c166ac2f tail:0xc166b017 end:0xc166ac80 dev:eth0
kernel: ------------[ cut here ]------------
kernel: kernel BUG at net/core/skbuff.c:95!
Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/llc/llc_s_ac.c')
| -rw-r--r-- | net/llc/llc_s_ac.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/net/llc/llc_s_ac.c b/net/llc/llc_s_ac.c index ac3d93b210d2..a94bd56bcac6 100644 --- a/net/llc/llc_s_ac.c +++ b/net/llc/llc_s_ac.c @@ -103,7 +103,8 @@ int llc_sap_action_send_xid_r(struct llc_sap *sap, struct sk_buff *skb) llc_pdu_decode_sa(skb, mac_da); llc_pdu_decode_da(skb, mac_sa); llc_pdu_decode_ssap(skb, &dsap); - nskb = llc_alloc_frame(NULL, skb->dev); + nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U, + sizeof(struct llc_xid_info)); if (!nskb) goto out; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, dsap, @@ -144,11 +145,15 @@ int llc_sap_action_send_test_r(struct llc_sap *sap, struct sk_buff *skb) u8 mac_da[ETH_ALEN], mac_sa[ETH_ALEN], dsap; struct sk_buff *nskb; int rc = 1; + u32 data_size; llc_pdu_decode_sa(skb, mac_da); llc_pdu_decode_da(skb, mac_sa); llc_pdu_decode_ssap(skb, &dsap); - nskb = llc_alloc_frame(NULL, skb->dev); + + /* The test request command is type U (llc_len = 3) */ + data_size = ntohs(eth_hdr(skb)->h_proto) - 3; + nskb = llc_alloc_frame(NULL, skb->dev, LLC_PDU_TYPE_U, data_size); if (!nskb) goto out; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, dsap, |