mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 17:59:32 +00:00
drm/mst: Avoid dereferencing a NULL mstb in drm_dp_mst_handle_up_req()
In case of an unknown broadcast message is sent mstb will remain unset, so check for this. Cc: Dave Airlie <airlied@redhat.com> Cc: Lyude <lyude@redhat.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Lyude <lyude@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20170719114330.26540-3-imre.deak@intel.com
This commit is contained in:
parent
448421b5e9
commit
7f8b3987da
1 changed files with 3 additions and 1 deletions
|
@ -2324,7 +2324,9 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
|
|||
DRM_DEBUG_KMS("Got RSN: pn: %d avail_pbn %d\n", msg.u.resource_stat.port_number, msg.u.resource_stat.available_pbn);
|
||||
}
|
||||
|
||||
drm_dp_put_mst_branch_device(mstb);
|
||||
if (mstb)
|
||||
drm_dp_put_mst_branch_device(mstb);
|
||||
|
||||
memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx));
|
||||
}
|
||||
return ret;
|
||||
|
|
Loading…
Reference in a new issue