When search the first skb to collapse,the condition of overlap to the next one
have been
reached,but the start is less than TCP_SKB_CB(skb)->seq at this time, then
followed process
will trigger the BUG_ON of the offset(start - TCP_SKB_CB(skb)->seq).
So this patch add one check (! before(start,TCP_SKB_CB(skb)->seq)) to avoid
this ipanic.
Signed-off-by: Chen Jun <jun.d.c...@intel.com>
---
net/ipv4/tcp_input.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 9c62257..4c745c5 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4465,7 +4465,8 @@ restart:
* overlaps to the next one.
*/
if (!tcp_hdr(skb)->syn && !tcp_hdr(skb)->fin &&
- (tcp_win_from_space(skb->truesize) > skb->len ||
+ ((tcp_win_from_space(skb->truesize) > skb->len &&
+ !before(start, TCP_SKB_CB(skb)->seq)) ||
before(TCP_SKB_CB(skb)->seq, start))) {
end_of_skbs = false;
break;
--
1.7.4.1
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