[tor-commits] [tor/master] Use fast check for missing id in node_is_a_configured_bridge()
asn at torproject.org
asn at torproject.org
Tue Apr 30 16:18:52 UTC 2019
commit 806539b40a18dec15e1d3d108eb5aec9d9f3ca40
Author: Nick Mathewson <nickm at torproject.org>
Date: Fri Apr 26 11:19:46 2019 -0400
Use fast check for missing id in node_is_a_configured_bridge()
Fixes bug 30308; bugfix on 0.3.5.1-alpha.
---
changes/ticket30308 | 5 +++++
src/feature/client/bridges.c | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/changes/ticket30308 b/changes/ticket30308
new file mode 100644
index 000000000..b78e6b3e9
--- /dev/null
+++ b/changes/ticket30308
@@ -0,0 +1,5 @@
+ o Minor bugfixes (performance):
+ - When checking a node for bridge status, use a fast check to make sure
+ that its identity is set. Previously, we used a constant-time check,
+ which is not necessary when verifying a BUG() condition that causes
+ a stack trace. Fixes bug 30308; bugfix on 0.3.5.1-alpha.
diff --git a/src/feature/client/bridges.c b/src/feature/client/bridges.c
index 05f89ad36..ea1aff951 100644
--- a/src/feature/client/bridges.c
+++ b/src/feature/client/bridges.c
@@ -348,7 +348,7 @@ int
node_is_a_configured_bridge(const node_t *node)
{
/* First, let's try searching for a bridge with matching identity. */
- if (BUG(tor_digest_is_zero(node->identity)))
+ if (BUG(tor_mem_is_zero(node->identity, DIGEST_LEN)))
return 0;
if (find_bridge_by_digest(node->identity) != NULL)
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