Log Message:
redis: updated to 6.2.6

Redis 6.2.6

Upgrade urgency: SECURITY, contains fixes to security issues.

Security Fixes:
* (CVE-2021-41099) Integer to heap buffer overflow handling certain string
  commands and network payloads, when proto-max-bulk-len is manually configured
  to a non-default, very large value [reported by yiyuaner].
* (CVE-2021-32762) Integer to heap buffer overflow issue in redis-cli and
  redis-sentinel parsing large multi-bulk replies on some older and less common
  platforms [reported by Microsoft Vulnerability Research].
* (CVE-2021-32687) Integer to heap buffer overflow with intsets, when
  set-max-intset-entries is manually configured to a non-default, very large
  value [reported by Pawel Wieczorkiewicz, AWS].
* (CVE-2021-32675) Denial Of Service when processing RESP request payloads with
  a large number of elements on many connections.
* (CVE-2021-32672) Random heap reading issue with Lua Debugger [reported by
  Meir Shpilraien].
* (CVE-2021-32628) Integer to heap buffer overflow handling ziplist-encoded
  data types, when configuring a large, non-default value for
  hash-max-ziplist-entries, hash-max-ziplist-value, zset-max-ziplist-entries
  or zset-max-ziplist-value [reported by sundb].
* (CVE-2021-32627) Integer to heap buffer overflow issue with streams, when
  configuring a non-default, large value for proto-max-bulk-len and
  client-query-buffer-limit [reported by sundb].
* (CVE-2021-32626) Specially crafted Lua scripts may result with Heap buffer
  overflow [reported by Meir Shpilraien].

Bug fixes that involve behavior changes:
* GEO* STORE with empty source key deletes the destination key and return 0
  Previously it would have returned an empty array like the non-STORE variant.
* PUBSUB NUMPAT replies with number of patterns rather than number of subscriptions
  This actually changed in 6.2.0 but was overlooked and omitted from the release \ 
notes.

Bug fixes that are only applicable to previous releases of Redis 6.2:
* Fix CLIENT PAUSE, used an old timeout from previous PAUSE
* Fix CLIENT PAUSE in a replica would mess the replication offset
* Add some missing error statistics in INFO errorstats

Other bug fixes:
* Fix incorrect reply of COMMAND command key positions for MIGRATE command
* Fix appendfsync to always guarantee fsync before reply, on MacOS and FreeBSD \ 
(kqueue)
* Fix the wrong mis-detection of sync_file_range system call, affecting performance

CLI tools:
* When redis-cli received ASK response, it didn't handle it

Improvements:
* Add latency monitor sample when key is deleted via lazy expire
* Sanitize corrupt payload improvements
* Delete empty keys when loading RDB file or handling a RESTORE command