On Thu, Feb 28, 2019 at 10:07:35AM -0500, Sasha Levin wrote: > From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > [ Upstream commit 36991ca68db9dd43bac7f3519f080ee3939263ef ] > > If debugfs were to return a non-NULL error for a debugfs call, using > that pointer later in debugfs_create_files() would crash. > > Fix that by properly checking the pointer before referencing it. > > Reported-by: Michal Hocko <mhocko@xxxxxxxxxx> > Reported-and-tested-by: syzbot+b382ba6a802a3d242790@xxxxxxxxxxxxxxxxxxxxxxxxx > Reported-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> > --- > block/blk-mq-debugfs.c | 3 +++ > 1 file changed, 3 insertions(+) > As the commit this "fixes" should not be backported, no need for this patch in any stable kernel either. Please drop from all queues. thanks, greg k-h
