On Mon, 2018-01-22 at 23:39 -0800, syzbot wrote: > Hello, > > syzbot hit the following crash on upstream commit > 0d665e7b109d512b7cae3ccef6e8654714887844 (Fri Jan 19 12:49:24 2018 +0000) > mm, page_vma_mapped: Drop faulty pointer arithmetics in check_pte() > > So far this crash happened 23 times on net-next, upstream. > C reproducer is attached. > syzkaller reproducer is attached. > Raw console output is attached. > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached. > user-space arch: i386 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+41cdaf4232c50e658934@xxxxxxxxxxxxxxxxxxxxxxxxx > It will help syzbot understand when the bug is fixed. See footer for > details. > If you forward the report, please keep this part and the footer. > > ------------[ cut here ]------------ > workqueue: WQ_MEM_RECLAIM hwsim_wq:destroy_radio is > flushing !WQ_MEM_RECLAIM events_highpri:flush_backlog > WARNING: CPU: 0 PID: 3706 at kernel/workqueue.c:2439 > check_flush_dependency+0x239/0x380 kernel/workqueue.c:2435 > Kernel panic - not syncing: panic_on_warn set ... Yeah, we clearly shouldn't have WQ_RECLAIM set on this workqueue... johannes
