mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 19:45:19 +02:00
537de4718f
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13416 3c298f89-4303-0410-b956-a3cf2f4a3e73
117 lines
3.3 KiB
Diff
117 lines
3.3 KiB
Diff
fixes ACL race condition caused by acl list modifications at run time
|
|
|
|
Signed-off-by: Sebastian Gottschall <brainslayer@dd-wrt.com>
|
|
|
|
--- a/net80211/ieee80211_acl.c
|
|
+++ b/net80211/ieee80211_acl.c
|
|
@@ -112,9 +112,9 @@ acl_detach(struct ieee80211vap *vap)
|
|
{
|
|
struct aclstate *as = vap->iv_as;
|
|
|
|
- ACL_LOCK(as);
|
|
+ ACL_LOCK_IRQ(as);
|
|
acl_free_all_locked(as);
|
|
- ACL_UNLOCK(as);
|
|
+ ACL_UNLOCK_IRQ(as);
|
|
vap->iv_as = NULL;
|
|
ACL_LOCK_DESTROY(as);
|
|
FREE(as, M_DEVBUF);
|
|
@@ -128,11 +128,18 @@ _find_acl(struct aclstate *as, const u_i
|
|
struct acl *acl;
|
|
int hash;
|
|
|
|
+ /* locking needed, as inserts are not atomic */
|
|
+ ACL_LOCK_IRQ(as);
|
|
hash = ACL_HASH(macaddr);
|
|
LIST_FOREACH(acl, &as->as_hash[hash], acl_hash) {
|
|
- if (IEEE80211_ADDR_EQ(acl->acl_macaddr, macaddr))
|
|
- return acl;
|
|
+ if (!IEEE80211_ADDR_EQ(acl->acl_macaddr, macaddr))
|
|
+ continue;
|
|
+
|
|
+ ACL_UNLOCK_IRQ_EARLY(as);
|
|
+ return acl;
|
|
}
|
|
+ ACL_UNLOCK_IRQ(as);
|
|
+
|
|
return NULL;
|
|
}
|
|
|
|
@@ -176,11 +183,11 @@ acl_add(struct ieee80211vap *vap, const
|
|
return -ENOMEM;
|
|
}
|
|
|
|
- ACL_LOCK(as);
|
|
+ ACL_LOCK_IRQ(as);
|
|
hash = ACL_HASH(mac);
|
|
LIST_FOREACH(acl, &as->as_hash[hash], acl_hash) {
|
|
if (IEEE80211_ADDR_EQ(acl->acl_macaddr, mac)) {
|
|
- ACL_UNLOCK_EARLY(as);
|
|
+ ACL_UNLOCK_IRQ_EARLY(as);
|
|
FREE(new, M_80211_ACL);
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_ACL,
|
|
"ACL: add " MAC_FMT " failed, already present\n",
|
|
@@ -191,7 +198,7 @@ acl_add(struct ieee80211vap *vap, const
|
|
IEEE80211_ADDR_COPY(new->acl_macaddr, mac);
|
|
TAILQ_INSERT_TAIL(&as->as_list, new, acl_list);
|
|
LIST_INSERT_HEAD(&as->as_hash[hash], new, acl_hash);
|
|
- ACL_UNLOCK(as);
|
|
+ ACL_UNLOCK_IRQ(as);
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_ACL,
|
|
"ACL: add " MAC_FMT "\n", MAC_ADDR(mac));
|
|
@@ -204,11 +211,11 @@ acl_remove(struct ieee80211vap *vap, con
|
|
struct aclstate *as = vap->iv_as;
|
|
struct acl *acl;
|
|
|
|
- ACL_LOCK(as);
|
|
+ ACL_LOCK_IRQ(as);
|
|
acl = _find_acl(as, mac);
|
|
if (acl != NULL)
|
|
_acl_free(as, acl);
|
|
- ACL_UNLOCK(as);
|
|
+ ACL_UNLOCK_IRQ(as);
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_ACL,
|
|
"ACL: remove " MAC_FMT "%s\n", MAC_ADDR(mac),
|
|
@@ -235,9 +242,9 @@ acl_free_all(struct ieee80211vap *vap)
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_ACL, "ACL: %s\n", "free all");
|
|
|
|
- ACL_LOCK(as);
|
|
+ ACL_LOCK_IRQ(as);
|
|
acl_free_all_locked(vap->iv_as);
|
|
- ACL_UNLOCK(as);
|
|
+ ACL_UNLOCK_IRQ(as);
|
|
|
|
return 0;
|
|
}
|
|
--- a/net80211/ieee80211_linux.h
|
|
+++ b/net80211/ieee80211_linux.h
|
|
@@ -319,16 +319,15 @@ typedef spinlock_t ieee80211_scan_lock_t
|
|
typedef spinlock_t acl_lock_t;
|
|
#define ACL_LOCK_INIT(_as, _name) spin_lock_init(&(_as)->as_lock)
|
|
#define ACL_LOCK_DESTROY(_as)
|
|
-#define ACL_LOCK(_as) do { \
|
|
- ACL_LOCK_CHECK(_as); \
|
|
- spin_lock(&(_as)->as_lock);
|
|
-#define ACL_UNLOCK(_as) \
|
|
- ACL_LOCK_ASSERT(_as); \
|
|
- spin_unlock(&(_as)->as_lock); \
|
|
-} while(0)
|
|
-#define ACL_UNLOCK_EARLY(_as) \
|
|
- ACL_LOCK_ASSERT(_as); \
|
|
- spin_unlock(&(_as)->as_lock);
|
|
+#define ACL_LOCK_IRQ(_as) do { \
|
|
+ unsigned long __acl_lockflags; \
|
|
+ spin_lock_irqsave(&(_as)->as_lock, __acl_lockflags);
|
|
+#define ACL_UNLOCK_IRQ(_as) \
|
|
+ spin_unlock_irqrestore(&(_as)->as_lock, __acl_lockflags); \
|
|
+} while (0)
|
|
+#define ACL_UNLOCK_IRQ_EARLY(_as) do { \
|
|
+ spin_unlock_irqrestore(&(_as)->as_lock, __acl_lockflags); \
|
|
+} while (0)
|
|
|
|
#if (defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)) && defined(spin_is_locked)
|
|
#define ACL_LOCK_ASSERT(_as) \
|