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r18880@catbus: nickm | 2008-03-17 12:51:24 -0400

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Fix policy-related crash bug found by lodger.


svn:r14077
This commit is contained in:
Nick Mathewson 2008-03-17 16:51:48 +00:00
parent 0cccf7375b
commit 9a24158c69
4 changed files with 19 additions and 2 deletions
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3
ChangeLog
View File

@ -29,6 +29,9 @@ Changes in version 0.2.1.1-alpha - 2008-??-??
- Detect mismatched page sizes when using --enable-openbsd-malloc.
Bugfix on 0.2.0.x.
- Stop giving double-close warn when we reject an address for client DNS.
- Make sure that the "NULL-means-reject *:*" convention is followed by
all the policy manipulation functions, avoiding some possible crash
bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
o Minor features:
- Allow separate log levels to be configured for different logging

2
src/or/or.h
View File

@ -1118,7 +1118,7 @@ typedef enum {
ADDR_POLICY_REJECT=2,
} addr_policy_action_t;
/** A linked list of policy rules */
/** A reference-counted address policy rule. */
typedef struct addr_policy_t {
int refcnt; /**< Reference count */
addr_policy_action_t policy_type:2;/**< What to do when the policy matches.*/

10
src/or/policies.c
View File

@ -530,7 +530,10 @@ compare_addr_to_addr_policy(uint32_t addr, uint16_t port,
int match = 0;
int maybe = 0;
int i, len;
len = policy ? smartlist_len(policy) : 0;
if (!policy)
return ADDR_POLICY_REJECTED;
len = smartlist_len(policy);
for (i = 0; i < len; ++i) {
addr_policy_t *tmpe = smartlist_get(policy, i);
@ -764,6 +767,9 @@ exit_policy_is_general_exit(smartlist_t *policy)
static const int ports[] = { 80, 443, 6667 };
int n_allowed = 0;
int i;
if (!policy)
return 0;
for (i = 0; i < 3; ++i) {
SMARTLIST_FOREACH(policy, addr_policy_t *, p, {
if (p->prt_min > ports[i] || p->prt_max < ports[i])
@ -787,6 +793,8 @@ exit_policy_is_general_exit(smartlist_t *policy)
int
policy_is_reject_star(smartlist_t *policy)
{
if (!policy)
return 1;
SMARTLIST_FOREACH(policy, addr_policy_t *, p, {
if (p->policy_type == ADDR_POLICY_ACCEPT)
return 0;

6
src/or/test.c
View File

@ -3034,6 +3034,8 @@ test_policies(void)
compare_addr_to_addr_policy(0, 2, policy));
test_assert(ADDR_POLICY_REJECTED ==
compare_addr_to_addr_policy(0xc0a80102, 2, policy));
test_assert(ADDR_POLICY_REJECTED ==
compare_addr_to_addr_policy(0x01020304u, 2, NULL));
policy2 = NULL;
test_assert(0 == policies_parse_exit_policy(NULL, &policy2, 1, NULL));
@ -3041,12 +3043,16 @@ test_policies(void)
test_assert(!exit_policy_is_general_exit(policy));
test_assert(exit_policy_is_general_exit(policy2));
test_assert(!exit_policy_is_general_exit(NULL));
test_assert(cmp_addr_policies(policy, policy2));
test_assert(cmp_addr_policies(policy, NULL));
test_assert(!cmp_addr_policies(policy2, policy2));
test_assert(!cmp_addr_policies(NULL, NULL));
test_assert(!policy_is_reject_star(policy2));
test_assert(policy_is_reject_star(policy));
test_assert(policy_is_reject_star(NULL));
addr_policy_list_free(policy);
addr_policy_list_free(policy2);