On Tue, 2013-05-14 at 15:04 -0400, Greg Kroah-Hartman wrote: > On Mon, May 13, 2013 at 04:30:06PM -0400, Joern Engel wrote: > > It is possible for one thread to to take se_sess->sess_cmd_lock in > > core_tmr_abort_task() before taking a reference count on > > se_cmd->cmd_kref, while another thread in target_put_sess_cmd() drops > > se_cmd->cmd_kref before taking se_sess->sess_cmd_lock. > > > > This introduces kref_put_spinlock_irqsave() and uses it in > > target_put_sess_cmd() to close the race window. > > > > Signed-off-by: Joern Engel <joern@xxxxxxxxx> > > For the kref.h part, please feel free to add: > > Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Applied to target-pending/queue Since this fixes a real long-standing bug within tcm_qla2xxx code, I'm adding a CC' to stable as well. Thanks Joern + Greg-KH! --nab -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
