On Fri, Jun 18, 2021 at 11:36:16AM +0200, Johannes Berg wrote: > On Thu, 2021-06-10 at 21:49 +0530, Anirudh Rayabharam wrote: > > syzbot, using KMSAN, has reported an uninit-value access in > > hwsim_cloned_frame_received_nl(). This is happening because frame_data_len > > is 0. The code doesn't detect this case and blindly tries to read the > > frame's header. > > > > Fix this by bailing out in case frame_data_len is 0. > > This really seems quite pointless - you should bail out if the frame is > too short for what we need to do, not just when it's 0. That makes sense. Do you happen to know what the min length of a valid frame is? There doesn't seem to be constant defined for that already. - Anirudh > > johannes >
