[tor-commits] [tor/release-0.4.4] Merge branch 'bug40076_043' into bug40076_044

[ahf@xxxxxxxxxxxxxx]

commit b4400e2093f68e349464eacd7dbe44cebf8d5c71
Merge: 0c8c295963 69d7752937
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date:   Thu Jul 30 14:28:11 2020 -0400

    Merge branch 'bug40076_043' into 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 95b384bf06,d7b73e3807..a5031a47a6
--- a/src/lib/buf/buffers.c
+++ b/src/lib/buf/buffers.c
@@@ -692,9 -692,11 +692,11 @@@ buf_move_all(buf_t *buf_out, buf_t *buf
    tor_assert(buf_out);
    if (!buf_in)
      return;
+   if (buf_datalen(buf_in) == 0)
+     return;
 -  if (BUG(buf_out->datalen >= INT_MAX || buf_in->datalen >= INT_MAX))
 +  if (BUG(buf_out->datalen > BUF_MAX_LEN || buf_in->datalen > BUF_MAX_LEN))
      return;
 -  if (BUG(buf_out->datalen >= INT_MAX - buf_in->datalen))
 +  if (BUG(buf_out->datalen > BUF_MAX_LEN - buf_in->datalen))
      return;
  
    if (buf_out->head == NULL) {



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