From 159005e91a64b95f200e92397674fea8647cd4d3 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Fri, 13 Mar 2026 17:59:35 -1000
Subject: [PATCH] [esp32] Use 512-byte stack buffer for early/constrained log
 formatting

---
 esphome/core/log.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/esphome/core/log.cpp b/esphome/core/log.cpp
index c61b64b0a2f..caadccae871 100644
--- a/esphome/core/log.cpp
+++ b/esphome/core/log.cpp
@@ -113,7 +113,7 @@ static void __attribute__((noinline)) esp_log_format_early_(esp_log_msg_t *messa
   static const char lvl[] = {'\0', 'E', 'W', 'I', 'D', 'V'};
   // Format into stack buffer and output atomically via esp_rom_printf
   // to prevent interleaving. Can't use fwrite (newlib locks not initialized).
-  char buf[256];
+  char buf[512];
   int pos = 0;
   uint8_t level = message->config.opts.log_level;
   if (level > 0 && level < sizeof(lvl)) {