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lib: utils/irqchip: plic: Ensure no out-of-bound access in context save/restore helpers

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Currently the context save/restore helpers writes/reads the provided
array using an index whose maximum value is determined by PLIC, which
potentially may disagree with the caller to these helpers.

Add a parameter to ask the caller to provide the size limit of the
array to ensure no out-of-bound access happens.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Bin Meng
2022-12-11 14:54:24 +08:00
committed by Anup Patel
parent fabbc00668
commit 9a2eeb4aae
5 changed files with 23 additions and 14 deletions
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4
include/sbi_utils/irqchip/plic.h
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@@ -24,10 +24,10 @@ void plic_priority_restore(const struct plic_data *plic, const u8 *priority,
u32 num);
void plic_context_save(const struct plic_data *plic, int context_id,
u32 *enable, u32 *threshold);
u32 *enable, u32 *threshold, u32 num);
void plic_context_restore(const struct plic_data *plic, int context_id,
const u32 *enable, u32 threshold);
const u32 *enable, u32 threshold, u32 num);
int plic_context_init(const struct plic_data *plic, int context_id,
bool enable, u32 threshold);