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Avoid segfault if EntryGuardPathBias precedes EntryGuard

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Fix for bug 6774; bugfix on 0.2.3.17-beta.
This commit is contained in:
Nick Mathewson 2012-09-05 13:27:54 -04:00
parent acfd487e7d
commit 9d9ca264ec
2 changed files with 10 additions and 0 deletions
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4
changes/bug6774 Normal file
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@ -0,0 +1,4 @@
o Minor bugfixes:
- Avoid crashing on a malformed state file where EntryGuardPathBias
precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.

6
src/or/circuitbuild.c
View File

@ -4877,6 +4877,12 @@ entry_guards_parse_state(or_state_t *state, int set, char **msg)
const or_options_t *options = get_options();
unsigned hop_cnt, success_cnt;
if (!node) {
*msg = tor_strdup("Unable to parse entry nodes: "
"EntryGuardPathBias without EntryGuard");
break;
}
if (tor_sscanf(line->value, "%u %u", &success_cnt, &hop_cnt) != 2) {
log_warn(LD_GENERAL, "Unable to parse guard path bias info: "
"Misformated EntryGuardPathBias %s", escaped(line->value));