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authorMohsin Kazmi <sykazmi@cisco.com>2019-08-22 18:40:28 +0200
committerAndrew Yourtchenko <ayourtch@gmail.com>2019-08-26 19:13:47 +0000
commit3f1964d2d2847c5307694fe8daea0a7eef1e2733 (patch)
tree38a2df4b683da5b5c9b98fc8898eb9cd2d38a032 /src/vnet
parent61b28ba69df829e1e8aa9f8dd1983493cd26b927 (diff)
gso: fix segmentation when gso_size greater than vlib buffer size
Type: fix Ticket: VPP-1751 Change-Id: I5ffb078492adc97374290de404f2ec0102b75184 Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/interface_output.c5
1 files changed, 4 insertions, 1 deletions
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);