Don't try to allocate too much memory if extension intro had too high ext_id.

--HG--
branch : HEAD

diff --git a/src/lib-index/mail-index-sync-ext.c b/src/lib-index/mail-index-sync-ext.c
index 406802b8cc949a9406d33ec3e3792c39218037ac..81f533606453a2a0ef509e5b454de4874d474c73 100644 (file)
--- a/src/lib-index/mail-index-sync-ext.c
+++ b/src/lib-index/mail-index-sync-ext.c
@@ -350,6 +350,11 @@ mail_index_sync_ext_unknown_complain(struct mail_index_sync_map_ctx *ctx,
 {
        unsigned char *p;
 
+       if (ext_map_idx >= 1024) {
+               /* don't try to track too high values */
+               return TRUE;
+       }
+
        if (ctx->unknown_extensions == NULL) {
                ctx->unknown_extensions =
                        buffer_create_dynamic(default_pool, ext_map_idx + 8);