early_res: Need to save the allocation name in drop_range_partial()
During free_early_partial(), reserve_early_without_check() could end extending the early_res area from __check_and_double_early_res(); as a result, the location of the name for the current reservation could change. Therefore, we need to save a local copy of the name. [ hpa: rewrote comment and checkin description ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4B8C7C94.7070000@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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@ -79,9 +79,19 @@ static void __init drop_range_partial(int i, u64 start, u64 end)
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/* make head segment */
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early_res[i].end = common_start;
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if (old_end > common_end) {
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char name[15];
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/*
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* Save a local copy of the name, since the
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* early_res array could get resized inside
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* reserve_early_without_check() ->
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* __check_and_double_early_res(), which would
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* make the current name pointer invalid.
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*/
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strncpy(name, early_res[i].name,
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sizeof(early_res[i].name) - 1);
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/* add another for left over on tail */
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reserve_early_without_check(common_end, old_end,
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early_res[i].name);
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reserve_early_without_check(common_end, old_end, name);
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}
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return;
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} else {
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