[tor-commits] [tor/master] Merge branch 'bug40076_044'

[ahf@xxxxxxxxxxxxxx]

commit 4c810a6abe8817be07390d1bcbd8f25ef4ad826a
Merge: 155e0dee49 b4400e2093
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date:   Thu Jul 30 14:35:06 2020 -0400

    Merge branch 'bug40076_044'

 changes/bug40076        |  5 ++++
 src/lib/buf/buffers.c   |  2 ++
 src/test/test_buffers.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+)

diff --cc src/lib/buf/buffers.c
index aa0af69072,a5031a47a6..23fc1e23a6
--- a/src/lib/buf/buffers.c
+++ b/src/lib/buf/buffers.c
@@@ -692,13 -691,13 +692,15 @@@ buf_move_all(buf_t *buf_out, buf_t *buf
  {
    tor_assert(buf_out);
    if (!buf_in)
 -    return;
 +    return 0;
+   if (buf_datalen(buf_in) == 0)
 -    return;
++    return 0;
    if (BUG(buf_out->datalen > BUF_MAX_LEN || buf_in->datalen > BUF_MAX_LEN))
 -    return;
 +    return 0;
    if (BUG(buf_out->datalen > BUF_MAX_LEN - buf_in->datalen))
 -    return;
 +    return 0;
 +
 +  size_t n_bytes_moved = buf_in->datalen;
  
    if (buf_out->head == NULL) {
      buf_out->head = buf_in->head;

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