Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:drm/amd/display: Avoid race between dcn10_set_drr() and dc_state_destruct()dc_state_destruct() nulls the resource context of the DC state. The pipecontext passed to dcn10_set_drr() is a member of this resource context.If dc_state_destruct() is called parallel to the IRQ processing (whichcalls dcn10_set_drr() at some point), we can end up using already nulledfunction callback fields of struct stream_resource.The logic in dcn10_set_drr() already tries to avoid this, by checking tgagainst NULL. But if the nulling happens exactly after the NULL check andbefore the next access, then we get a race.Avoid this by copying tg first to a local variable, and then use thisvariable for all the operations. This should work, as long as nobodyfrees the resource pool where the timing generators live.(cherry picked from commit a3cc326a43bdc48fbdf53443e1027a03e309b643)
No PoCs from references.
- https://github.com/fkie-cad/nvd-json-data-feeds