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-rw-r--r--src/plugins/memif/node.c47
1 files changed, 27 insertions, 20 deletions
diff --git a/src/plugins/memif/node.c b/src/plugins/memif/node.c
index 270fd59ca47..675acf3b49e 100644
--- a/src/plugins/memif/node.c
+++ b/src/plugins/memif/node.c
@@ -30,9 +30,10 @@
#include <memif/memif.h>
#include <memif/private.h>
-#define foreach_memif_input_error \
- _(BUFFER_ALLOC_FAIL, "buffer allocation failed") \
- _(NOT_IP, "not ip packet")
+#define foreach_memif_input_error \
+ _ (BUFFER_ALLOC_FAIL, "buffer allocation failed") \
+ _ (BAD_DESC, "bad descriptor") \
+ _ (NOT_IP, "not ip packet")
typedef enum
{
@@ -199,6 +200,7 @@ memif_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
memif_packet_op_t *po;
memif_region_index_t last_region = ~0;
void *last_region_shm = 0;
+ void *last_region_max = 0;
mq = vec_elt_at_index (mif->rx_queues, qid);
ring = mq->ring;
@@ -249,26 +251,31 @@ memif_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
{
last_region_shm = mif->regions[d0->region].shm;
last_region = d0->region;
+ last_region_max =
+ last_region_shm + mif->regions[last_region].region_size;
}
mb0 = last_region_shm + d0->offset;
- do
- {
- u32 dst_free = buffer_size - dst_off;
- if (dst_free == 0)
- {
- dst_off = 0;
- dst_free = buffer_size;
- n_buffers++;
- }
- u32 bytes_to_copy = clib_min (dst_free, n_bytes_left);
- memif_add_copy_op (ptd, mb0 + src_off, bytes_to_copy, dst_off,
- n_buffers - 1);
- n_bytes_left -= bytes_to_copy;
- src_off += bytes_to_copy;
- dst_off += bytes_to_copy;
- }
- while (PREDICT_FALSE (n_bytes_left));
+ if (PREDICT_FALSE (mb0 + n_bytes_left > last_region_max))
+ vlib_error_count (vm, node->node_index, MEMIF_INPUT_ERROR_BAD_DESC, 1);
+ else
+ do
+ {
+ u32 dst_free = buffer_size - dst_off;
+ if (dst_free == 0)
+ {
+ dst_off = 0;
+ dst_free = buffer_size;
+ n_buffers++;
+ }
+ u32 bytes_to_copy = clib_min (dst_free, n_bytes_left);
+ memif_add_copy_op (ptd, mb0 + src_off, bytes_to_copy, dst_off,
+ n_buffers - 1);
+ n_bytes_left -= bytes_to_copy;
+ src_off += bytes_to_copy;
+ dst_off += bytes_to_copy;
+ }
+ while (PREDICT_FALSE (n_bytes_left));
cur_slot++;
n_slots--;