[PATCH 19.07 ubus 3/3] libubus: increase stack depth for processing obj msgs

[Petr Štetiar]

From: Felix Fietkau <nbd at nbd.name>

Avoid running into an issue where issuing a request from an obj message
can lead to recursive message processing and list corruption

Signed-off-by: Felix Fietkau <nbd at nbd.name>
(cherry picked from commit a72457b61df045d3c499a6211362b751710590d7)
---
 libubus.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libubus.c b/libubus.c
index 7ce454eabc64..aee2a3b722a7 100644
--- a/libubus.c
+++ b/libubus.c
@@ -103,7 +103,9 @@ ubus_process_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf, int fd)
 			break;
 		}
 
+		ctx->stack_depth++;
 		ubus_process_obj_msg(ctx, buf, fd);
+		ctx->stack_depth--;
 		break;
 	case UBUS_MSG_MONITOR:
 		if (ctx->monitor_cb)