From f9e5b0d93d0cd0eb65f23cff3ca7e827a96bd83c Mon Sep 17 00:00:00 2001
From: iabdalkader <i.abdalkader@gmail.com>
Date: Sat, 18 Dec 2021 19:11:47 +0200
Subject: [PATCH] stm32/factoryreset: Init vfs flags before calling
 pyb_flash_init_vfs.

The vfs flags could have any random value from stack.  This bug was
introduced back in 7723dac3371ccf081c2490b33b69492dc42818bd
---
 ports/stm32/factoryreset.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ports/stm32/factoryreset.c b/ports/stm32/factoryreset.c
index 999056e72..10eb3a17a 100644
--- a/ports/stm32/factoryreset.c
+++ b/ports/stm32/factoryreset.c
@@ -109,6 +109,7 @@ MP_WEAK int factory_reset_create_filesystem(void) {
     uint32_t start_tick = HAL_GetTick();
 
     fs_user_mount_t vfs;
+    vfs.blockdev.flags = 0;
     pyb_flash_init_vfs(&vfs);
     uint8_t working_buf[FF_MAX_SS];
     FRESULT res = f_mkfs(&vfs.fatfs, FM_FAT, 0, working_buf, sizeof(working_buf));