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

scsi: sd: change allow_restart to bool in sysfs interface

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: scsi-sd-change-allow_restart-to-bool-in-sysfs-interface.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Mon Dec 18 14:47:43 CET 2017

From: weiping zhang zhangweiping@didichuxing.com Date: Thu, 12 Oct 2017 14:56:44 +0800 Subject: scsi: sd: change allow_restart to bool in sysfs interface

From: weiping zhang zhangweiping@didichuxing.com

[ Upstream commit 658e9a6dc1126f21fa417cd213e1cdbff8be0ba2 ]

/sys/class/scsi_disk/0:2:0:0/allow_restart can be changed to 0 unexpectedly by writing an invalid string such as the following:

echo asdf > /sys/class/scsi_disk/0:2:0:0/allow_restart

Signed-off-by: weiping zhang zhangweiping@didichuxing.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/scsi/sd.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -259,6 +259,7 @@ static ssize_t allow_restart_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { + bool v; struct scsi_disk *sdkp = to_scsi_disk(dev); struct scsi_device *sdp = sdkp->device;

@@ -268,7 +269,10 @@ allow_restart_store(struct device *dev, if (sdp->type != TYPE_DISK) return -EINVAL;

- sdp->allow_restart = simple_strtoul(buf, NULL, 10); + if (kstrtobool(buf, &v)) + return -EINVAL; + + sdp->allow_restart = v;

return count; }

Patches currently in stable-queue which might be from zhangweiping@didichuxing.com are

queue-4.4/scsi-sd-change-allow_restart-to-bool-in-sysfs-interface.patch queue-4.4/scsi-sd-change-manage_start_stop-to-bool-in-sysfs-interface.patch