media: chips-media: wave5: Release m2m_ctx after Instance Removed from List

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Possible use after free if IRQ thread manages to obtain spinlock between
m2m_ctx release and wave5_release function removing stream instance from
list of active instances. The IRQ thread looks for the m2m_ctx which is
freed so null pointer dereference occurs.

Signed-off-by: Brandon Brnich <b-brnich@ti.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Tested-by: Jackson Lee <jackson.lee@chipsnmedia.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

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Brandon Brnich 2026-04-02 13:45:53 -05:00 • committed by Hans Verkuil

parent 4ae45bf466

commit 7cdbd7bb21

1 changed files with 3 additions and 1 deletions

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drivers/media/platform/chips-media/wave5/wave5-helper.c

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