From: Ivan Grokhotkov <ivan@espressif.com>
Date: Mon, 11 Dec 2017 03:06:29 +0000 (+0800)
Subject: fatfs: fix double free in bailout path of esp_vfs_fat_sdmmc_mount
X-Git-Tag: v3.1-beta1~541^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ed1e6e72242dc224d1b7437a98d56039b8791472;p=esp-idf

fatfs: fix double free in bailout path of esp_vfs_fat_sdmmc_mount

Fixes https://github.com/espressif/esp-idf/issues/1370
---

diff --git a/components/fatfs/src/vfs_fat_sdmmc.c b/components/fatfs/src/vfs_fat_sdmmc.c
index 68751cb50f..5e79d4a9f8 100644
--- a/components/fatfs/src/vfs_fat_sdmmc.c
+++ b/components/fatfs/src/vfs_fat_sdmmc.c
@@ -128,6 +128,7 @@ esp_err_t esp_vfs_fat_sdmmc_mount(const char* base_path,
             goto fail;
         }
         free(workbuf);
+        workbuf = NULL;
         ESP_LOGW(TAG, "mounting again");
         res = f_mount(fs, drv, 0);
         if (res != FR_OK) {