Obuf limit, exit during loop in *RAND* commands
Related to the hang reported in #11671 Currently, redis can disconnect a client due to reaching output buffer limit, it'll also avoid feeding that output buffer with more data, but it will keep running the loop in the command (despite the client already being marked for disconnection) This PR is an attempt to mitigate the problem, specifically for commands that are easy to abuse, specifically: SRANDMEMBER. The RAND family of commands can take a negative COUNT argument (which is not bound to the number of elements in the key), so it's enough to create a key with one field, and then these commands can be used to hang redis. NOTICE: For in Redis 7.0 this fix handles KEYS as well, but in this branch it doesn't, details in #11676
Please register or sign in to comment