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8332865: ubsan: os::attempt_reserve_memory_between reports overflow

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Reviewed-by: stuefe, clanger
This commit is contained in:
Matthias Baesken 2024-06-06 12:27:26 +00:00
parent f15d423fb5
commit 8de5d2014a
1 changed files with 5 additions and 1 deletions
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6
src/hotspot/share/runtime/os.cpp
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@ -1935,7 +1935,11 @@ char* os::attempt_reserve_memory_between(char* min, char* max, size_t bytes, siz
return nullptr; // overflow return nullptr; // overflow
} }
char* const hi_att = align_down(MIN2(max, absolute_max) - bytes, alignment_adjusted); char* const hi_end = MIN2(max, absolute_max);
if ((uintptr_t)hi_end < bytes) {
return nullptr; // no need to go on
}
char* const hi_att = align_down(hi_end - bytes, alignment_adjusted);
if (hi_att > max) { if (hi_att > max) {
return nullptr; // overflow return nullptr; // overflow
} }