Now that unsetters don't set pointers to NULL, check if the attribute is
set before trying to release it.
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
---
src/chain.c | 18 ++++++++++--------
src/expr/immediate.c | 2 +-
src/expr/log.c | 2 +-
src/expr/match.c | 4 ++--
src/expr/target.c | 2 +-
src/rule.c | 20 +++++++++++---------
src/set.c | 14 ++++++++------
src/set_elem.c | 20 +++++++++-----------
src/table.c | 5 +++--
9 files changed, 46 insertions(+), 41 deletions(-)
diff --git a/src/chain.c b/src/chain.c
index e0f548c..86ccef6 100644
--- a/src/chain.c
+++ b/src/chain.c
@@ -95,11 +95,11 @@ EXPORT_SYMBOL(nftnl_chain_alloc);
void nftnl_chain_free(const struct nftnl_chain *c)
{
- if (c->table != NULL)
+ if (c->flags & (1 << NFTNL_CHAIN_TABLE))
xfree(c->table);
- if (c->type != NULL)
+ if (c->flags & (1 << NFTNL_CHAIN_TYPE))
xfree(c->type);
- if (c->dev != NULL)
+ if (c->flags & (1 << NFTNL_CHAIN_DEV))
xfree(c->dev);
xfree(c);
@@ -167,7 +167,7 @@ int nftnl_chain_set_data(struct nftnl_chain *c, uint16_t
attr,
strncpy(c->name, data, NFT_CHAIN_MAXNAMELEN);
break;
case NFTNL_CHAIN_TABLE:
- if (c->table)
+ if (c->flags & (1 << NFTNL_CHAIN_TABLE))
xfree(c->table);
c->table = strdup(data);
@@ -199,7 +199,7 @@ int nftnl_chain_set_data(struct nftnl_chain *c, uint16_t
attr,
c->family = *((uint32_t *)data);
break;
case NFTNL_CHAIN_TYPE:
- if (c->type)
+ if (c->flags & (1 << NFTNL_CHAIN_TYPE))
xfree(c->type);
c->type = strdup(data);
@@ -207,7 +207,7 @@ int nftnl_chain_set_data(struct nftnl_chain *c, uint16_t
attr,
return -1;
break;
case NFTNL_CHAIN_DEV:
- if (c->dev)
+ if (c->flags & (1 << NFTNL_CHAIN_DEV))
xfree(c->dev);
c->dev = strdup(data);
@@ -533,7 +533,8 @@ int nftnl_chain_nlmsg_parse(const struct nlmsghdr *nlh,
struct nftnl_chain *c)
c->flags |= (1 << NFTNL_CHAIN_NAME);
}
if (tb[NFTA_CHAIN_TABLE]) {
- xfree(c->table);
+ if (c->flags & (1 << NFTNL_CHAIN_TABLE))
+ xfree(c->table);
c->table = strdup(mnl_attr_get_str(tb[NFTA_CHAIN_TABLE]));
if (!c->table)
return -1;
@@ -562,7 +563,8 @@ int nftnl_chain_nlmsg_parse(const struct nlmsghdr *nlh,
struct nftnl_chain *c)
c->flags |= (1 << NFTNL_CHAIN_HANDLE);
}
if (tb[NFTA_CHAIN_TYPE]) {
- xfree(c->type);
+ if (c->flags & (1 << NFTNL_CHAIN_TYPE))
+ xfree(c->type);
c->type = strdup(mnl_attr_get_str(tb[NFTA_CHAIN_TYPE]));
if (!c->type)
return -1;
diff --git a/src/expr/immediate.c b/src/expr/immediate.c
index 243f0e0..22ec864 100644
--- a/src/expr/immediate.c
+++ b/src/expr/immediate.c
@@ -43,7 +43,7 @@ nftnl_expr_immediate_set(struct nftnl_expr *e, uint16_t type,
imm->data.verdict = *((uint32_t *)data);
break;
case NFTNL_EXPR_IMM_CHAIN:
- if (imm->data.chain)
+ if (e->flags & (1 << NFTNL_EXPR_IMM_CHAIN))
xfree(imm->data.chain);
imm->data.chain = strdup(data);
diff --git a/src/expr/log.c b/src/expr/log.c
index 5b774a4..b9b3951 100644
--- a/src/expr/log.c
+++ b/src/expr/log.c
@@ -37,7 +37,7 @@ static int nftnl_expr_log_set(struct nftnl_expr *e, uint16_t
type,
switch(type) {
case NFTNL_EXPR_LOG_PREFIX:
- if (log->prefix)
+ if (log->flags & (1 << NFTNL_EXPR_LOG_PREFIX))
xfree(log->prefix);
log->prefix = strdup(data);
diff --git a/src/expr/match.c b/src/expr/match.c
index 2929b43..3342e2c 100644
--- a/src/expr/match.c
+++ b/src/expr/match.c
@@ -49,7 +49,7 @@ nftnl_expr_match_set(struct nftnl_expr *e, uint16_t type,
mt->rev = *((uint32_t *)data);
break;
case NFTNL_EXPR_MT_INFO:
- if (mt->data)
+ if (e->flags & (1 << NFTNL_EXPR_MT_INFO))
xfree(mt->data);
mt->data = data;
@@ -146,7 +146,7 @@ static int nftnl_expr_match_parse(struct nftnl_expr *e,
struct nlattr *attr)
uint32_t len = mnl_attr_get_payload_len(tb[NFTA_MATCH_INFO]);
void *match_data;
- if (match->data)
+ if (e->flags & (1 << NFTNL_EXPR_MT_INFO))
xfree(match->data);
match_data = calloc(1, len);
diff --git a/src/expr/target.c b/src/expr/target.c
index 68a7d8a..d4c0091 100644
--- a/src/expr/target.c
+++ b/src/expr/target.c
@@ -49,7 +49,7 @@ nftnl_expr_target_set(struct nftnl_expr *e, uint16_t type,
tg->rev = *((uint32_t *)data);
break;
case NFTNL_EXPR_TG_INFO:
- if (tg->data)
+ if (e->flags & (1 << NFTNL_EXPR_TG_INFO))
xfree(tg->data);
tg->data = data;
diff --git a/src/rule.c b/src/rule.c
index 375552e..c46c325 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -71,11 +71,11 @@ void nftnl_rule_free(const struct nftnl_rule *r)
list_for_each_entry_safe(e, tmp, &r->expr_list, head)
nftnl_expr_free(e);
- if (r->table != NULL)
+ if (r->flags & (1 << (NFTNL_RULE_TABLE)))
xfree(r->table);
- if (r->chain != NULL)
+ if (r->flags & (1 << (NFTNL_RULE_CHAIN)))
xfree(r->chain);
- if (r->user.data != NULL)
+ if (r->flags & (1 << (NFTNL_RULE_USERDATA)))
xfree(r->user.data);
xfree(r);
@@ -129,7 +129,7 @@ int nftnl_rule_set_data(struct nftnl_rule *r, uint16_t attr,
switch(attr) {
case NFTNL_RULE_TABLE:
- if (r->table)
+ if (r->flags & (1 << NFTNL_RULE_TABLE))
xfree(r->table);
r->table = strdup(data);
@@ -137,7 +137,7 @@ int nftnl_rule_set_data(struct nftnl_rule *r, uint16_t attr,
return -1;
break;
case NFTNL_RULE_CHAIN:
- if (r->chain)
+ if (r->flags & (1 << NFTNL_RULE_CHAIN))
xfree(r->chain);
r->chain = strdup(data);
@@ -160,7 +160,7 @@ int nftnl_rule_set_data(struct nftnl_rule *r, uint16_t attr,
r->position = *((uint64_t *)data);
break;
case NFTNL_RULE_USERDATA:
- if (r->user.data != NULL)
+ if (r->flags & (1 << NFTNL_RULE_USERDATA))
xfree(r->user.data);
r->user.data = malloc(data_len);
@@ -431,14 +431,16 @@ int nftnl_rule_nlmsg_parse(const struct nlmsghdr *nlh,
struct nftnl_rule *r)
return -1;
if (tb[NFTA_RULE_TABLE]) {
- xfree(r->table);
+ if (r->flags & (1 << NFTNL_RULE_TABLE))
+ xfree(r->table);
r->table = strdup(mnl_attr_get_str(tb[NFTA_RULE_TABLE]));
if (!r->table)
return -1;
r->flags |= (1 << NFTNL_RULE_TABLE);
}
if (tb[NFTA_RULE_CHAIN]) {
- xfree(r->chain);
+ if (r->flags & (1 << NFTNL_RULE_CHAIN))
+ xfree(r->chain);
r->chain = strdup(mnl_attr_get_str(tb[NFTA_RULE_CHAIN]));
if (!r->chain)
return -1;
@@ -460,7 +462,7 @@ int nftnl_rule_nlmsg_parse(const struct nlmsghdr *nlh,
struct nftnl_rule *r)
const void *udata =
mnl_attr_get_payload(tb[NFTA_RULE_USERDATA]);
- if (r->user.data)
+ if (r->flags & (1 << NFTNL_RULE_USERDATA))
xfree(r->user.data);
r->user.len = mnl_attr_get_payload_len(tb[NFTA_RULE_USERDATA]);
diff --git a/src/set.c b/src/set.c
index ccea313..132e913 100644
--- a/src/set.c
+++ b/src/set.c
@@ -44,9 +44,9 @@ void nftnl_set_free(const struct nftnl_set *s)
{
struct nftnl_set_elem *elem, *tmp;
- if (s->table != NULL)
+ if (s->flags & (1 << NFTNL_SET_TABLE))
xfree(s->table);
- if (s->name != NULL)
+ if (s->flags & (1 << NFTNL_SET_NAME))
xfree(s->name);
list_for_each_entry_safe(elem, tmp, &s->element_list, head) {
@@ -116,7 +116,7 @@ int nftnl_set_set_data(struct nftnl_set *s, uint16_t attr,
const void *data,
switch(attr) {
case NFTNL_SET_TABLE:
- if (s->table)
+ if (s->flags & (1 << NFTNL_SET_TABLE))
xfree(s->table);
s->table = strdup(data);
@@ -124,7 +124,7 @@ int nftnl_set_set_data(struct nftnl_set *s, uint16_t attr,
const void *data,
return -1;
break;
case NFTNL_SET_NAME:
- if (s->name)
+ if (s->flags & (1 << NFTNL_SET_NAME))
xfree(s->name);
s->name = strdup(data);
@@ -439,14 +439,16 @@ int nftnl_set_nlmsg_parse(const struct nlmsghdr *nlh,
struct nftnl_set *s)
return -1;
if (tb[NFTA_SET_TABLE]) {
- xfree(s->table);
+ if (s->flags & (1 << NFTNL_SET_TABLE))
+ xfree(s->table);
s->table = strdup(mnl_attr_get_str(tb[NFTA_SET_TABLE]));
if (!s->table)
return -1;
s->flags |= (1 << NFTNL_SET_TABLE);
}
if (tb[NFTA_SET_NAME]) {
- xfree(s->name);
+ if (s->flags & (1 << NFTNL_SET_NAME))
+ xfree(s->name);
s->name = strdup(mnl_attr_get_str(tb[NFTA_SET_NAME]));
if (!s->name)
return -1;
diff --git a/src/set_elem.c b/src/set_elem.c
index dbf4176..596ba8a 100644
--- a/src/set_elem.c
+++ b/src/set_elem.c
@@ -41,12 +41,8 @@ EXPORT_SYMBOL(nftnl_set_elem_alloc);
void nftnl_set_elem_free(struct nftnl_set_elem *s)
{
- if (s->flags & (1 << NFTNL_SET_ELEM_CHAIN)) {
- if (s->data.chain) {
- xfree(s->data.chain);
- s->data.chain = NULL;
- }
- }
+ if (s->flags & (1 << NFTNL_SET_ELEM_CHAIN))
+ xfree(s->data.chain);
if (s->flags & (1 << NFTNL_SET_ELEM_EXPR))
nftnl_expr_free(s->expr);
@@ -107,7 +103,7 @@ int nftnl_set_elem_set(struct nftnl_set_elem *s, uint16_t
attr,
s->data.verdict = *((uint32_t *)data);
break;
case NFTNL_SET_ELEM_CHAIN: /* NFTA_SET_ELEM_DATA */
- if (s->data.chain)
+ if (s->flags & (1 << NFTNL_SET_ELEM_CHAIN))
xfree(s->data.chain);
s->data.chain = strdup(data);
@@ -122,7 +118,7 @@ int nftnl_set_elem_set(struct nftnl_set_elem *s, uint16_t
attr,
s->timeout = *((uint64_t *)data);
break;
case NFTNL_SET_ELEM_USERDATA: /* NFTA_SET_ELEM_USERDATA */
- if (s->user.data != NULL)
+ if (s->flags & (1 << NFTNL_SET_ELEM_USERDATA))
xfree(s->user.data);
s->user.data = malloc(data_len);
@@ -400,7 +396,7 @@ static int nftnl_set_elems_parse2(struct nftnl_set *s,
const struct nlattr *nest
const void *udata =
mnl_attr_get_payload(tb[NFTA_SET_ELEM_USERDATA]);
- if (e->user.data)
+ if (e->flags & (1 << NFTNL_RULE_USERDATA))
xfree(e->user.data);
e->user.len =
mnl_attr_get_payload_len(tb[NFTA_SET_ELEM_USERDATA]);
@@ -473,7 +469,8 @@ int nftnl_set_elems_nlmsg_parse(const struct nlmsghdr *nlh,
struct nftnl_set *s)
return -1;
if (tb[NFTA_SET_ELEM_LIST_TABLE]) {
- xfree(s->table);
+ if (s->flags & (1 << NFTNL_SET_TABLE))
+ xfree(s->table);
s->table =
strdup(mnl_attr_get_str(tb[NFTA_SET_ELEM_LIST_TABLE]));
if (!s->table)
@@ -481,7 +478,8 @@ int nftnl_set_elems_nlmsg_parse(const struct nlmsghdr *nlh,
struct nftnl_set *s)
s->flags |= (1 << NFTNL_SET_TABLE);
}
if (tb[NFTA_SET_ELEM_LIST_SET]) {
- xfree(s->name);
+ if (s->flags & (1 << NFTNL_SET_NAME))
+ xfree(s->name);
s->name =
strdup(mnl_attr_get_str(tb[NFTA_SET_ELEM_LIST_SET]));
if (!s->name)
diff --git a/src/table.c b/src/table.c
index 03b618f..9231937 100644
--- a/src/table.c
+++ b/src/table.c
@@ -89,7 +89,7 @@ int nftnl_table_set_data(struct nftnl_table *t, uint16_t attr,
switch (attr) {
case NFTNL_TABLE_NAME:
- if (t->name)
+ if (t->flags & (1 << NFTNL_TABLE_NAME))
xfree(t->name);
t->name = strdup(data);
@@ -227,7 +227,8 @@ int nftnl_table_nlmsg_parse(const struct nlmsghdr *nlh,
struct nftnl_table *t)
return -1;
if (tb[NFTA_TABLE_NAME]) {
- xfree(t->name);
+ if (t->flags & (1 << NFTNL_TABLE_NAME))
+ xfree(t->name);
t->name = strdup(mnl_attr_get_str(tb[NFTA_TABLE_NAME]));
if (!t->name)
return -1;
--
2.1.4
--
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