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| author | Cristian Ciocaltea <cristian.ciocaltea@collabora.com> | 2026-09-01 21:50:36 +0300 |
|---|---|---|
| committer | Luca Ceresoli <luca.ceresoli@bootlin.com> | 2026-09-30 12:49:01 +0200 |
| commit | b62e3db8cdc1680e1c3390591e872f485148541a (patch) | |
| tree | 4552b04455aab4b4d1b5ef3afd3a14e911c6d2ae /tools/lib/python/kdoc/python_version.py | |
| parent | e78a9fb7a40c55ec2a70ae39903dde4f898af2ef (diff) | |
| download | linux-next-b62e3db8cdc1680e1c3390591e872f485148541a.tar.gz linux-next-b62e3db8cdc1680e1c3390591e872f485148541a.zip | |
drm/bridge: Fix unlocked list_del in drm_bridge_add()
When re-adding a bridge that was previously removed, drm_bridge_add()
drops it from bridge_lingering_list without holding bridge_lock.
Both bridge_list and bridge_lingering_list are protected by bridge_lock,
as they are concurrently modified by drm_bridge_remove() and
__drm_bridge_free(), and walked by the debugfs 'bridges' file. Running
the list_empty() test and the list_del_init() outside of the lock may
therefore corrupt either list.
Perform both under bridge_lock.
Fixes: 17805a15d175 ("drm/bridge: add list of removed refcounted bridges")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/all/20260723015004.1F5711F000E9@smtp.kernel.org/
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Igor Paunovic <royalnet026@gmail.com> # RK3588 Orange Pi 5 Plus, dual HDMI
Tested-by: Robin Räber <robin.raebi@gmail.com>
Link: https://patch.msgid.link/20260901-dw-hdmi-qp-scramb-v11-12-bc12954a0688@collabora.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Diffstat (limited to 'tools/lib/python/kdoc/python_version.py')
0 files changed, 0 insertions, 0 deletions