Patch "serial: sh-sci: Uninitialized variables in sysfs files" has been added to the 4.12-stable tree

This is a note to let you know that I've just added the patch titled

serial: sh-sci: Uninitialized variables in sysfs files

to the 4.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
serial-sh-sci-uninitialized-variables-in-sysfs-files.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Dan Carpenter <[email protected]>
Date: Mon, 17 Jul 2017 11:34:23 +0300
Subject: serial: sh-sci: Uninitialized variables in sysfs files

From: Dan Carpenter <[email protected]>

commit 4ab3c51e0540ba8464fe34d84cc35821bb77ae92 upstream.

The kstrtol() function returns -ERANGE as well as -EINVAL so these tests are not enough. It's not a super serious bug, but my static checker correctly complains that the "r" variable might be used uninitialized.

---
 drivers/tty/serial/sh-sci.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

@@ -1085,10 +1085,12 @@ static ssize_t rx_trigger_store(struct d
 {
 	struct uart_port *port = dev_get_drvdata(dev);
 	struct sci_port *sci = to_sci_port(port);
+	int ret;
 	long r;
 
-	if (kstrtol(buf, 0, &r) == -EINVAL)
-		return -EINVAL;
+	ret = kstrtol(buf, 0, &r);
+	if (ret)
+		return ret;
 
 	sci->rx_trigger = scif_set_rtrg(port, r);
 	if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)

@@ -1116,10 +1118,12 @@ static ssize_t rx_fifo_timeout_store(str
 {
 	struct uart_port *port = dev_get_drvdata(dev);
 	struct sci_port *sci = to_sci_port(port);
+	int ret;
 	long r;
 
-	if (kstrtol(buf, 0, &r) == -EINVAL)
-		return -EINVAL;
+	ret = kstrtol(buf, 0, &r);
+	if (ret)
+		return ret;
 	sci->rx_fifo_timeout = r;
 	scif_set_rtrg(port, 1);
 	if (r > 0)

Patches currently in stable-queue which might be from [email protected] are

queue-4.12/serial-st-asc-potential-error-pointer-dereference.patch queue-4.12/ipmi-ssif-add-missing-unlock-in-error-branch.patch queue-4.12/serial-sh-sci-uninitialized-variables-in-sysfs-files.patch