[tor-commits] [tor/release-0.2.7] get_interface_address6_list(): Bring back a return code check

[nickm@xxxxxxxxxxxxxx]

commit 3ea834ce0a63f275fd806f9ebeec64a2bbcd1b55
Author: Fabian Keil <fk@xxxxxxxxxxxxx>
Date:   Mon Sep 28 16:57:07 2015 +0200

    get_interface_address6_list(): Bring back a return code check
    
    ... that was removed by 31eb486c46 which first appeared in
    0.2.7.3-rc.
    
    If tor is running in a ElectroBSD (or FreeBSD) jail it can't
    get any IP addresses that aren't assigned to the jail by
    looking at the interfaces and (by design) the
    get_interface_address6_via_udp_socket_hack() fallback doesn't
    work either.
    
    The missing return code check resulted in tor_addr_is_internal()
    complaining about a "non-IP address of type 49", due to reading
    uninitialised memory.
    
    Fixes #17173.
---
 src/common/address.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/common/address.c b/src/common/address.c
index 163db59..fc85f8e 100644
--- a/src/common/address.c
+++ b/src/common/address.c
@@ -1711,7 +1711,8 @@ MOCK_IMPL(smartlist_t *,get_interface_address6_list,(int severity,
   }
 
   /* Okay, the smart way is out. */
-  get_interface_address6_via_udp_socket_hack(severity,family,&addr);
+  if (get_interface_address6_via_udp_socket_hack(severity,family,&addr))
+     return smartlist_new();
   if (!include_internal && tor_addr_is_internal(&addr, 0)) {
     return smartlist_new();
   } else {



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