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Fix potential race in pubsub

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Former-commit-id: 427c5999f167256dc3a6a0f49ad28313f700a155
This commit is contained in:
John Sully 2019-10-25 02:44:14 -04:00
parent 949270801e
commit a55fe8a3ba
1 changed files with 8 additions and 4 deletions
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12
src/pubsub.cpp
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@ -301,9 +301,11 @@ int pubsubPublishMessage(robj *channel, robj *message) {
client *c = reinterpret_cast<client*>(ln->value);
if (c->flags & CLIENT_CLOSE_ASAP) // avoid blocking if the write will be ignored
continue;
fastlock_lock(&c->lock);
if (FCorrectThread(c))
fastlock_lock(&c->lock);
addReplyPubsubMessage(c,channel,message);
fastlock_unlock(&c->lock);
if (FCorrectThread(c))
fastlock_unlock(&c->lock);
receivers++;
}
}
@ -321,10 +323,12 @@ int pubsubPublishMessage(robj *channel, robj *message) {
{
if (pat->pclient->flags & CLIENT_CLOSE_ASAP)
continue;
fastlock_lock(&pat->pclient->lock);
if (FCorrectThread(pat->pclient))
fastlock_lock(&pat->pclient->lock);
addReplyPubsubPatMessage(pat->pclient,
pat->pattern,channel,message);
fastlock_unlock(&pat->pclient->lock);
if (FCorrectThread(pat->pclient))
fastlock_unlock(&pat->pclient->lock);
receivers++;
}
}