diff options
| author | Eric Dumazet <edumazet@google.com> | 2017-10-18 17:02:03 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-20 10:10:34 +0100 |
| commit | fdfcb06c5944afb78007cfc25e527ff689b2a344 (patch) | |
| tree | 53af1e3dc0c155a61272cb96e255da27297e14fb /net/ipv4/route.c | |
| parent | 48185ffb6dc3eb64846039117d76148d3e3d7022 (diff) | |
ipv4: ipv4_default_advmss() should use route mtu
[ Upstream commit 164a5e7ad531e181334a3d3f03d0d5ad20d6faea ]
ipv4_default_advmss() incorrectly uses the device MTU instead
of the route provided one. IPv6 has the proper behavior,
lets harmonize the two protocols.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 647cfc972bde..804bead564db 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1254,7 +1254,7 @@ static void set_class_tag(struct rtable *rt, u32 tag) static unsigned int ipv4_default_advmss(const struct dst_entry *dst) { unsigned int header_size = sizeof(struct tcphdr) + sizeof(struct iphdr); - unsigned int advmss = max_t(unsigned int, dst->dev->mtu - header_size, + unsigned int advmss = max_t(unsigned int, ipv4_mtu(dst) - header_size, ip_rt_min_advmss); return min(advmss, IPV4_MAX_PMTU - header_size); |