The lock of lruhash table should unlocked after markdel entry #399
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…hen lru_remove the entry , then unlock the table, and then markdel entry , but in function rrset_cache_touch , the entry will be touched to lru again before markdelling entry in function lruhash_remove. This is a bug!
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Previous title was, from xiangbao227: |
wcawijngaards
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wcawijngaards
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Jan 13, 2021
- Merge #399 from xiangbao227: The function rrset_cache_touch can touch an entry to the lru while markdelling the entry in lruhash_remove.
rma-shuyu
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Thank you for the bug fix! That was hard to find, I think. I have committed the fix to the code repository. The other calls of the markdel function have the table lock held, so they should not have this race condition. |
wcawijngaards
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Jan 13, 2021
- Merge #399 from xiangbao227: The lock of lruhash table should unlocked after markdel entry.
jedisct1
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Jan 20, 2021
* nlnet/master: (33 commits) rpl tests for nsid example.conf.in entry for nsid - Fix declaration before statement and signed comparison warning in dns64. - Fix NLnetLabs#404: DNS query with small edns bufsize fail. Changelog entry for NLnetLabs#402. - Merge NLnetLabs#402 from fobser: Implement IPv4-Embedded addresses according to RFC6052. Implement IPv4-Embedded addresses according to RFC6052. - Fix for NLnetLabs#93: dynlibmodule import library is named libunbound.dll.a. - Fix for NLnetLabs#93: dynlibmodule link fix for Windows. Nicer changelog note for NLnetLabs#399 - Merge NLnetLabs#399 from xiangbao227: The lock of lruhash table should unlocked after markdel entry. Changelog note for NLnetLabs#399 - Merge NLnetLabs#399 from xiangbao227: The function rrset_cache_touch can touch an entry to the lru while markdelling the entry in lruhash_remove. I found that in function lruhash_remove, table was locked at first ,then lru_remove the entry , then unlock the table, and then markdel entry , but in function rrset_cache_touch , the entry will be touched to lru again before markdelling entry in function lruhash_remove. This is a bug! And man page documentation for them. - Fix so local zone types always_nodata and always_deny can be used from the config file. - Fix NLnetLabs#397: [Feature request] add new type always_null to local-zone similar to always_nxdomain. - Fix clang analysis warning. - Add comment documentation. - For NLnetLabs#391: more double casts in python start time calculation. - For NLnetLabs#391: fix indentation. - For NLnetLabs#391: use struct timeval* start_time for callback information. Changelog note for NLnetLabs#391 - Merge PR NLnetLabs#391 from fhriley: Add start_time to reply callbacks so modules can compute the response time. ...
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…hen lru_remove the entry , then unlock the table, and then markdel entry , but in function rrset_cache_touch , the entry will be touched to lru again before markdelling entry in function lruhash_remove. This is a bug!