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softmmu: Assert data in bounds in iotlb_to_section

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Acked-by: Alex Bennée <alex.bennee@linaro.org>
Suggested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-08-25 14:06:58 -07:00
parent 813bac3d8d
commit 86e4f93d82
1 changed files with 8 additions and 2 deletions
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10
softmmu/physmem.c
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@ -2413,9 +2413,15 @@ MemoryRegionSection *iotlb_to_section(CPUState *cpu,
int asidx = cpu_asidx_from_attrs(cpu, attrs);
CPUAddressSpace *cpuas = &cpu->cpu_ases[asidx];
AddressSpaceDispatch *d = qatomic_rcu_read(&cpuas->memory_dispatch);
MemoryRegionSection *sections = d->map.sections;
int section_index = index & ~TARGET_PAGE_MASK;
MemoryRegionSection *ret;
return &sections[index & ~TARGET_PAGE_MASK];
assert(section_index < d->map.sections_nb);
ret = d->map.sections + section_index;
assert(ret->mr);
assert(ret->mr->ops);
return ret;
}
static void io_mem_init(void)