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authorTomi Valkeinen <tomi.valkeinen@ti.com>2020-04-15 12:20:06 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>2020-04-20 10:07:35 +0300
commit9da67433f64eb89e5a7b47977507806c6ea026e7 (patch)
tree38fb5b37c3075b238e00bf387fe9c20dbecb0b88 /Documentation
parent7bfc1fec1af3e2f0194843855b0d49054fa42fd2 (diff)
drm/tidss: fix crash related to accessing freed memory
tidss uses devm_kzalloc to allocate DRM plane, encoder and crtc objects. This is not correct as the lifetime of those objects should be longer than the underlying device's. When unloading tidss module, the devm_kzalloc'ed objects have already been freed when tidss_release() is called, and the driver will accesses freed memory possibly causing a crash, a kernel WARN, or other undefined behavior, and also KASAN will give a bug. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200415092006.26675-1-tomi.valkeinen@ti.com Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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