From 3f1964d2d2847c5307694fe8daea0a7eef1e2733 Mon Sep 17 00:00:00 2001 From: Mohsin Kazmi Date: Thu, 22 Aug 2019 18:40:28 +0200 Subject: gso: fix segmentation when gso_size greater than vlib buffer size Type: fix Ticket: VPP-1751 Change-Id: I5ffb078492adc97374290de404f2ec0102b75184 Signed-off-by: Mohsin Kazmi --- src/vnet/interface_output.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/vnet/interface_output.c b/src/vnet/interface_output.c index c863d444f5a..92cbaac4810 100644 --- a/src/vnet/interface_output.c +++ b/src/vnet/interface_output.c @@ -235,8 +235,11 @@ tso_alloc_tx_bufs (vlib_main_t * vm, vlib_buffer_t * b0, u32 n_bytes_b0, u16 l234_sz, u16 gso_size) { + u16 size = + clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz); + /* rounded-up division */ - u16 n_bufs = (n_bytes_b0 - l234_sz + (gso_size - 1)) / gso_size; + u16 n_bufs = (n_bytes_b0 - l234_sz + (size - 1)) / size; u16 n_alloc; ASSERT (n_bufs > 0); -- cgit 1.2.3-korg