Attachment 16109 Details for Bug 14430 – patch file based on Samba 4.11.9

patch file based on Samba 4.11.9

notifyd-memory-leak-fix-yyang-20200702.txt (text/plain), 2.20 KB, created by YOUZHONG YANG on 2020-07-02 22:22:58 UTC

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Creator: YOUZHONG YANG

Created: 2020-07-02 22:22:58 UTC

Size: 2.20 KB

patch

obsolete

>diff --git a/source3/smbd/notifyd/notifyd.c b/source3/smbd/notifyd/notifyd.c
>index 6ff1de5b5fec0e5f52b3c51cfad951e1f2b49d78..c82b61fd14cec1efa94cc1172e348f6b5cf47caa 100644
>--- a/source3/smbd/notifyd/notifyd.c
>+++ b/source3/smbd/notifyd/notifyd.c
>@@ -379,6 +379,8 @@ static bool notifyd_apply_rec_change(
> 	size_t num_instances;
> 	size_t i;
> 	struct notifyd_instance *instance;
>+	struct notifyd_instance *inst;
>+	void *sys_watch;
> 	TDB_DATA value;
> 	NTSTATUS status;
> 	bool ok = false;
>@@ -460,24 +462,52 @@ static bool notifyd_apply_rec_change(
> 	if ((instance->instance.filter != 0) ||
> 	    (instance->instance.subdir_filter != 0)) {
> 		int ret;
>+		sys_watch = NULL;
> 
>-		TALLOC_FREE(instance->sys_watch);
>+		for (i=0; i<num_instances; i++) {
>+			inst = &instances[i];
>+			if(inst == instance)
>+				continue;
>+			if(instance->instance.filter == inst->instance.filter &&
>+			   instance->instance.subdir_filter == inst->instance.subdir_filter) {
>+				sys_watch = inst->sys_watch;
>+				break;
>+			}
>+		}
>+		if(sys_watch != NULL) {
>+			/* reuse sys_watch */
>+			instance->sys_watch = sys_watch;
>+		} else {
>+			TALLOC_FREE(instance->sys_watch);
> 
>-		ret = sys_notify_watch(entries, sys_notify_ctx, path,
>+			ret = sys_notify_watch(entries, sys_notify_ctx, path,
> 				       &instance->internal_filter,
> 				       &instance->internal_subdir_filter,
> 				       notifyd_sys_callback, msg_ctx,
> 				       &instance->sys_watch);
>-		if (ret != 0) {
>-			DBG_WARNING("sys_notify_watch for [%s] returned %s\n",
>+			if (ret != 0) {
>+				DBG_WARNING("sys_notify_watch for [%s] returned %s\n",
> 				    path, strerror(errno));
>+			}
> 		}
> 	}
> 
> 	if ((instance->instance.filter == 0) &&
> 	    (instance->instance.subdir_filter == 0)) {
>-		/* This is a delete request */
>-		TALLOC_FREE(instance->sys_watch);
>+		bool found = false;
>+		for (i=0; i<num_instances; i++) {
>+			inst = &instances[i];
>+			if(inst == instance)
>+				continue;
>+			if(instance->sys_watch == inst->sys_watch) {
>+				found = true;
>+				break;
>+			}
>+		}
>+		if(!found) {
>+			/* This is a delete request */
>+			TALLOC_FREE(instance->sys_watch);
>+		}
> 		*instance = instances[num_instances-1];
> 		num_instances -= 1;
> 	}

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