Tejun Heo wrote: > (cc'ing Tetuso and quoting whole message) > > Tetuso, could this be the same problem as the hang in wb_shutdown() > syszbot reported? Excuse me, but I'm too unfamiliar to judge it. ;-) Anyway, since Fabiano has a reproducer, I appreciate trying a patch at https://groups.google.com/forum/#!msg/syzkaller-bugs/qeR_1VM0UvU/1zcLE0Y4BAAJ . Also, Fabiano's attempt might be somewhat related to a NULL pointer race condition at https://groups.google.com/forum/#!msg/syzkaller-bugs/bVx4WExoTDw/G68X4kPcAQAJ .