RaiiMapOfListElement: fix invalid reference due to rehashing instability #15719
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mattklein123 merged 2 commits intoenvoyproxy:mainfrom Mar 28, 2021
junr03:fix-raii
Merged
RaiiMapOfListElement: fix invalid reference due to rehashing instability #15719mattklein123 merged 2 commits intoenvoyproxy:mainfrom junr03:fix-raii
mattklein123 merged 2 commits intoenvoyproxy:mainfrom
junr03:fix-raii
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added 2 commits
March 22, 2021 18:54
Signed-off-by: Jose Nino <jnino@lyft.com>
junr03
commented
Mar 26, 2021
| : map_(map), list_(map_.try_emplace(key).first->second), key_(key), cancelled_(false) { | ||
| it_ = list_.emplace(list_.begin(), value); | ||
| : map_(map), key_(key), cancelled_(false) { | ||
| // The list reference itself cannot be saved because it is not stable in the event of a |
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note: an alternative fix is to use absl::node_hash_map. I went ahead with this fix because it doesn't require usage site changes, and abseil generally recommends using flat_hash_map, over node_hash_map unless it's necessary.
This was referenced Mar 29, 2021
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Commit Message: fix invalid reference due to rehashing instability.
Risk Level: low - fixed repro.
Testing: new test to repro original issue.