From cdd493c0e4a2b9a441f0fe178c8d5274541f211e Mon Sep 17 00:00:00 2001
From: catfood <protonphantem@gmail.com>
Date: Wed, 22 Nov 2023 16:24:23 +0800
Subject: [PATCH] fix null ptr in init_vfs_table

---
 kernel/vfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/vfs.c b/kernel/vfs.c
index 262de5f..9893ab9 100644
--- a/kernel/vfs.c
+++ b/kernel/vfs.c
@@ -133,6 +133,7 @@ static void init_vfs_table(){  // modified by mingxuan 2020-10-30
     // tty0
     // device_table[0].dev_name="dev_tty0";
     // device_table[0].op = &f_op_table[0];
+    memset(vfs_table, 0, sizeof(vfs_table));
     vfs_table[0].fs_name = "dev_tty0"; //modifed by mingxuan 2020-10-18
     vfs_table[0].op = &f_op_table[0];
     vfs_table[0].sb = &super_block[0];  //每个tty都有一个superblock //added by mingxuan 2020-10-30
@@ -201,6 +202,7 @@ static int get_index(char path[]){
     for(i=0;i<NR_FS;i++)    //modified by mingxuan 2020-10-29
     {
         // if(!strcmp(dev_name, device_table[i].dev_name))
+        if(vfs_table[i].fs_name == NULL) continue;
         if(!strcmp(fs_name, vfs_table[i].fs_name)) //modified by mingxuan 2020-10-18
             return i;
     }