On Tue, Oct 01, 2019 at 01:09:07AM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: afb37288 Add linux-next specific files for 20191001 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=17619635600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=659cb5bf73e72c6c > dashboard link: https://syzkaller.appspot.com/bug?extid=6b6a46cc150b19f54ad6 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=176faa13600000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14b825cd600000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+6b6a46cc150b19f54...@syzkaller.appspotmail.com > > ================================================ > WARNING: lock held when returning to user space! > 5.4.0-rc1-next-20191001 #0 Not tainted > ------------------------------------------------ > syz-executor589/9088 is leaving the kernel with locks still held! > 1 lock held by syz-executor589/9088: > #0: ffffffff88faadc0 (rcu_read_lock){....}, at: > membarrier_private_expedited+0x180/0x590 kernel/sched/membarrier.c:150
https://lkml.kernel.org/r/20191001071921.gj4...@hirez.programming.kicks-ass.net
