4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Hannes Reinecke <[email protected]> commit 81b6c999897919d5a16fedc018fe375dbab091c5 upstream. As it turned out device_get() doesn't use kref_get_unless_zero(), so we will be always getting a device pointer. Consequently, we need to check for the device state in __scsi_remove_target() to avoid tripping over deleted objects. Fixes: fbce4d97fd43 ("scsi: fixup kernel warning during rmmod()") Reported-by: Jason Yan <[email protected]> Signed-off-by: Hannes Reinecke <[email protected]> Reviewed-by: Bart Van Assche <[email protected]> Reviewed-by: Ewan D. Milne <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]> Cc: Max Ivanov <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/scsi/scsi_sysfs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -1383,7 +1383,10 @@ static void __scsi_remove_target(struct * check. */ if (sdev->channel != starget->channel || - sdev->id != starget->id || + sdev->id != starget->id) + continue; + if (sdev->sdev_state == SDEV_DEL || + sdev->sdev_state == SDEV_CANCEL || !get_device(&sdev->sdev_gendev)) continue; spin_unlock_irqrestore(shost->host_lock, flags);
