On Thu, Feb 28, 2019 at 10:07:35AM -0500, Sasha Levin wrote:
From: Greg Kroah-Hartman gregkh@linuxfoundation.org
[ 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@kernel.org Reported-and-tested-by: syzbot+b382ba6a802a3d242790@syzkaller.appspotmail.com Reported-by: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org
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