On Sun, Jan 27, 2019 at 10:59:13PM -0800, Myungho Jung wrote: > tiocmget() and tiocmset() operations are optional and some tty drivers > like pty miss the operations. We need NULL check before referencing > them. Good catch. I suggest splitting these fixes in two separate patches (after addressing Marcel's comments). Don't forget to CC stable and add a Fixes-tag for each, as we we want to have this backported to stable. > Reported-by: syzbot+a950165cbb86bdd023a4@xxxxxxxxxxxxxxxxxxxxxxxxx Actually, these two bugs were never reported by sysbot AFAIKT so no need to give credit to anyone else here. > Signed-off-by: Myungho Jung <mhjungk@xxxxxxxxx> > --- > drivers/bluetooth/hci_ath.c | 13 ++++++++----- > drivers/bluetooth/hci_ldisc.c | 5 +++++ > 2 files changed, 13 insertions(+), 5 deletions(-) Johan