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Guangshuo Li
977f52909c
__destroy_component_cfg() adds each RIS mbwu_state object to the MPAM
garbage list when destroying component configuration.
However, mbwu_state is allocated per RIS and only for RISes with MBWU
monitors. A component can therefore have comp->cfg allocated while some
RISes still have ris->mbwu_state set to NULL.
Passing a NULL mbwu_state to add_to_garbage() dereferences the NULL
pointer inside the macro.
Skip RISes that do not have an mbwu_state object before adding them to
the garbage list.
Fixes: 41e8a14950 ("arm_mpam: Track bandwidth counter state for power management")
Signed-off-by: Guangshuo Li <[email protected]>
Reviewed-by: Ben Horgan <[email protected]>
Signed-off-by: Will Deacon <[email protected]>