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authorYoann Desmouceaux <ydesmouc@cisco.com>2018-05-29 13:38:44 +0200
committerDamjan Marion <dmarion.lists@gmail.com>2018-05-29 15:37:28 +0000
commit1977a3488e91c6a4074a5538730418031515b299 (patch)
treea60752451a03ea4efaaa7ee33847dc98f09edc80 /src/vlib/buffer_funcs.h
parent0a77040fa0f588f3c2d539aa1d3c500731520676 (diff)
Fixed vlib_buffer_clone with stale chained buffers
When calling vlib_buffer_clone() on a source vlib_buffer with no next buffer but whose total_length_not_including_first_buffer hadn't been properly zeroed out, the total_length_not_including_first_buffer of the clone was set to a wrong value. (see https://lists.fd.io/g/vpp-dev/topic/19869395) Change-Id: I4b503ece804e3933bb259be4c2148f84dafbea3e Signed-off-by: Yoann Desmouceaux <ydesmouc@cisco.com>
Diffstat (limited to 'src/vlib/buffer_funcs.h')
-rw-r--r--src/vlib/buffer_funcs.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/src/vlib/buffer_funcs.h b/src/vlib/buffer_funcs.h
index 6072b2ea44b..aa7526e079b 100644
--- a/src/vlib/buffer_funcs.h
+++ b/src/vlib/buffer_funcs.h
@@ -822,9 +822,14 @@ vlib_buffer_clone_256 (vlib_main_t * vm, u32 src_buffer, u32 * buffers,
d->current_length = head_end_offset;
vlib_buffer_set_free_list_index (d,
vlib_buffer_get_free_list_index (s));
- d->total_length_not_including_first_buffer =
- s->total_length_not_including_first_buffer + s->current_length -
+
+ d->total_length_not_including_first_buffer = s->current_length -
head_end_offset;
+ if (PREDICT_FALSE (s->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ d->total_length_not_including_first_buffer +=
+ s->total_length_not_including_first_buffer;
+ }
d->flags = s->flags | VLIB_BUFFER_NEXT_PRESENT;
d->flags &= ~VLIB_BUFFER_EXT_HDR_VALID;
clib_memcpy (d->opaque, s->opaque, sizeof (s->opaque));