On Tue, 2 Feb 2016, Dmitry Vyukov wrote: > Original log from fuzzer contained the following WARNING in > mm/rmap.c:412. But when I tried to reproduce it, I hit these hanged > processes instead. I can't reliably detect what program triggered > what. So it may be related, or maybe a separate issue. > > ------------[ cut here ]------------ > kernel BUG at mm/rmap.c:412!
Are you by any chance in this test sending signals to the fuzzer? If so, the bug I just fixed in floppy driver can cause all kinds of memory corruptions in case you're running multithreaded accessess to /dev/fd0 and sending singals to the threads that are trying to access /dev/fd0 at the same time. Could you please double check that the other floppy fix I've sent you a couple days ago doesn't fix this as well? (this test makes sense only if signals are involved though). Thanks, -- Jiri Kosina SUSE Labs
