serial: fixup /proc/tty/driver/serial after proc_fops conversion

"struct tty_driver *" lies in m->private not in v which is SEQ_TOKEN_START which is 1 which is enough to trigger NULL dereference next line: BUG: unable to handle kernel NULL pointer dereference at 000000ad IP: [<c040d689>] uart_proc_show+0xe/0x2b0 Noticed by Linus. Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mna · Apr 1, 2009 · 833bb30 · 833bb30
1 parent 8b53ef3
commit 833bb30
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
@@ -1765,7 +1765,7 @@ static void uart_line_info(struct seq_file *m, struct uart_driver *drv, int i)
 
 static int uart_proc_show(struct seq_file *m, void *v)
 {
-	struct tty_driver *ttydrv = v;
+	struct tty_driver *ttydrv = m->private;
 	struct uart_driver *drv = ttydrv->driver_state;
 	int i;