drm/bridge: Fix a NULL pointer dereference in drm_atomic_bridge_chain_check()

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drm_atomic_bridge_chain_check() callers can pass a NULL bridge. Let's
bail out before dereferencing the bridge pointer when that happens.

Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Fixes: b86d895524 ("drm/bridge: Add an ->atomic_check() hook")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107113031.435604-1-boris.brezillon@collabora.com

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Boris Brezillon 2020-01-07 12:30:31 +01:00

parent 3cacb2086e

commit b18398c16e

1 changed files with 5 additions and 1 deletions

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drivers/gpu/drm/drm_bridge.c

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