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Add protection againt sending to mailbox 0

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This commit is contained in:
pjht 2019-08-28 20:24:53 -05:00
parent c1e6f56fe3
commit e349f0ad3d
1 changed files with 4 additions and 0 deletions
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4
kernel/cpu/i386/mailboxes.c
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@ -28,6 +28,10 @@ void kernel_mailbox_free(uint32_t box) {
} }
void kernel_mailbox_send_msg(Message* user_msg) { void kernel_mailbox_send_msg(Message* user_msg) {
if (user_msg->to==0) {
serial_printf("Box %d attempted to send to box 0!\n",user_msg->from);
return;
}
Mailbox mailbox=mailboxes[user_msg->to]; Mailbox mailbox=mailboxes[user_msg->to];
char* msg_data=kmalloc(user_msg->size); char* msg_data=kmalloc(user_msg->size);
memcpy(msg_data,user_msg->msg,user_msg->size); memcpy(msg_data,user_msg->msg,user_msg->size);