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[drivers][ofw] Fix phandle hash buffer overflow #11845

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[drivers][ofw] Fix phandle hash buffer overflow #11845

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6 changes: 4 additions & 2 deletions components/drivers/ofw/base.c
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@ rt_err_t ofw_phandle_hash_reset(rt_phandle min, rt_phandle max)

if (max > _phandle_range[1])
{
rt_size_t size = sizeof(*_phandle_hash) * (max - min);
rt_size_t size = sizeof(*_phandle_hash) * (max - min + 1);

if (!_phandle_hash)
{
Expand All @@ -55,9 +55,11 @@ rt_err_t ofw_phandle_hash_reset(rt_phandle min, rt_phandle max)

if (hash_ptr)
{
rt_size_t old_min = _phandle_range[0];
rt_size_t old_max = _phandle_range[1];
rt_size_t old_count = old_max - old_min + 1;

rt_memset(&hash_ptr[old_max], 0, sizeof(_phandle_hash) * (max - old_max));
rt_memset(&hash_ptr[old_count], 0, size - old_count * sizeof(*_phandle_hash));
}
}
}
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