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authorJohn Lo <loj@cisco.com>2019-04-09 10:23:56 -0400
committerFlorin Coras <florin.coras@gmail.com>2019-04-10 00:35:35 +0000
commit1cf0007f394fde9beda3aa5150aac581a1075cf2 (patch)
treeaac3732166fd3fe563ae86e3f862181da5ff39b0 /src/vnet/ip
parent5763e47b7d0d9de7a46541e432abee39e17b5f1e (diff)
Make tcp/udp/icmp compute checksum safer for buffer-chain case
Change-Id: I046e481a67fbeffdaa8504c8d77d232b986a61ee Signed-off-by: John Lo <loj@cisco.com>
Diffstat (limited to 'src/vnet/ip')
-rw-r--r--src/vnet/ip/ip4_forward.c2
-rw-r--r--src/vnet/ip/ip6_forward.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c
index 4a2d413f53a..85e6607a963 100644
--- a/src/vnet/ip/ip4_forward.c
+++ b/src/vnet/ip/ip4_forward.c
@@ -1174,7 +1174,7 @@ ip4_tcp_udp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
ASSERT (p0->flags & VLIB_BUFFER_NEXT_PRESENT);
p0 = vlib_get_buffer (vm, p0->next_buffer);
data_this_buffer = vlib_buffer_get_current (p0);
- n_this_buffer = p0->current_length;
+ n_this_buffer = clib_min (p0->current_length, n_bytes_left);
}
sum16 = ~ip_csum_fold (sum0);
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index f1f291da8a2..6df3d4b036b 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -1011,7 +1011,7 @@ ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
}
p0 = vlib_get_buffer (vm, p0->next_buffer);
data_this_buffer = vlib_buffer_get_current (p0);
- n_this_buffer = p0->current_length;
+ n_this_buffer = clib_min (p0->current_length, n_bytes_left);
}
sum16 = ~ip_csum_fold (sum0);