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Subject[PATCH 1/1] Use defaults when no route options are available
Date
Trying to parse the option of a SYN packet that we have
no route entry for should just use global wide defaults
for route entry options.

Signed-off-by: Gilad Ben-Yossef <gilad@codefidence.com>
---
include/net/dst.h | 2 +-
net/ipv4/tcp_input.c | 2 --
2 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/include/net/dst.h b/include/net/dst.h
index b562be3..0654c27 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -114,7 +114,7 @@ dst_metric(const struct dst_entry *dst, int metric)
static inline u32
dst_feature(const struct dst_entry *dst, u32 feature)
{
- return dst_metric(dst, RTAX_FEATURES) & feature;
+ return (dst ? dst_metric(dst, RTAX_FEATURES) & feature : 0);
}

static inline u32 dst_mtu(const struct dst_entry *dst)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 4262da5..57e99e1 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -3704,8 +3704,6 @@ void tcp_parse_options(struct sk_buff *skb, struct tcp_options_received *opt_rx,
struct tcphdr *th = tcp_hdr(skb);
int length = (th->doff * 4) - sizeof(struct tcphdr);

- BUG_ON(!estab && !dst);
-
ptr = (unsigned char *)(th + 1);
opt_rx->saw_tstamp = 0;

--
1.5.6.3


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