On 04.12.2012 11:07, Peter Hurley wrote:
> This patch series addresses the causes of flush_to_ldisc accessing
> the tty after freeing.
>
I think, it is have sense only if you can take effect,
with this patch or something like. I can't. :)
Signed-off-by: Ilya Zykov <ilya@xxxxxxx>
---
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 2ea176b..f24751d 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -170,6 +170,10 @@ struct tty_struct *alloc_tty_struct(void)
return kzalloc(sizeof(struct tty_struct), GFP_KERNEL);
}
+static void flush_to_ldisc2(struct work_struct *work)
+{
+ printk(KERN_WARNING "Possible intrusion detected.\n");
+}
/**
* free_tty_struct - free a disused tty
* @tty: tty struct to free
@@ -188,6 +192,8 @@ void free_tty_struct(struct tty_struct *tty)
kfree(tty->write_buf);
tty_buffer_free_all(tty);
tty->magic = 0xDEADDEAD;
+ PREPARE_WORK(&tty->buf.work,flush_to_ldisc2);
+ //memset(tty, 0, sizeof(struct tty_struct));
kfree(tty);
}
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