On Wed, 19 Sep 2018, Mikulas Patocka wrote: > > > On Tue, 18 Sep 2018, Dmitry Safonov wrote: > > > Hi all, > > > > Three fixes that worth to have in the @stable, as they were hit by > > different people, including Arista on v4.9 stable. > > > > And for linux-next - adding lockdep asserts for line discipline changing > > code, verifying that write ldisc sem will be held forthwith. > > > > The last patch is an optional and probably, timeout can be dropped for > > read_lock(). I'll do it if everyone agrees. > > (Or as per discussion with Peter in v3, just convert ldisc to > > a regular rwsem). > > > > Thanks, > > Dima > > I confirm that this patch series fixes the crash for me. > > Tested-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> I was too quick to acknowledge this patchset. It doesn't work. This patchset fixes the crash, but it introduces another bug - when I type 'reboot' on the console, it prints 'INIT: Switching to runlevel: 6' and then it gets stuck for 80 seconds before proceeding with the reboot. When I revert this patchset 'reboot' reboots the machine without any delay. This bug was reproduced on Debian 5 userspace on pa-risc. Mikulas
