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[tor-commits] [tor/release-0.3.2] Clear the address when we can't choose a reachable address



commit 09b9a35c07a35c0891f8cb10406c113155740d18
Author: teor <teor2345@xxxxxxxxx>
Date:   Mon Dec 25 01:53:14 2017 +1100

    Clear the address when we can't choose a reachable address
    
    When the fascist_firewall_choose_address_ functions don't find a
    reachable address, set the returned address to the null address and port.
    
    This is a precautionary measure, because some callers do not check the
    return value.
    
    Fixes bug 24736; bugfix on 0.2.8.2-alpha.
---
 changes/bug24736  | 6 ++++++
 src/or/policies.c | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/changes/bug24736 b/changes/bug24736
new file mode 100644
index 000000000..632560932
--- /dev/null
+++ b/changes/bug24736
@@ -0,0 +1,6 @@
+  o Minor bugfixes (address selection):
+    - When the fascist_firewall_choose_address_ functions don't find a
+      reachable address, set the returned address to the null address and port.
+      This is a precautionary measure, because some callers do not check the
+      return value.
+      Fixes bug 24736; bugfix on 0.2.8.2-alpha.
diff --git a/src/or/policies.c b/src/or/policies.c
index 50fec3a77..f09a70899 100644
--- a/src/or/policies.c
+++ b/src/or/policies.c
@@ -860,6 +860,8 @@ fascist_firewall_choose_address_base(const tor_addr_t *ipv4_addr,
     ap->port = result->port;
     return 1;
   } else {
+    tor_addr_make_null(&ap->addr, AF_UNSPEC);
+    ap->port = 0;
     return 0;
   }
 }



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