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Fix an hypothetical issue in processMultibulkBuffer().

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antirez 2013-08-27 13:00:06 +02:00
parent 8811d49009
commit e29e426b43
1 changed files with 5 additions and 1 deletions
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6
src/networking.c
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@ -987,15 +987,19 @@ int processMultibulkBuffer(redisClient *c) {
pos += newline-(c->querybuf+pos)+2; pos += newline-(c->querybuf+pos)+2;
if (ll >= REDIS_MBULK_BIG_ARG) { if (ll >= REDIS_MBULK_BIG_ARG) {
size_t qblen;
/* If we are going to read a large object from network /* If we are going to read a large object from network
* try to make it likely that it will start at c->querybuf * try to make it likely that it will start at c->querybuf
* boundary so that we can optimize object creation * boundary so that we can optimize object creation
* avoiding a large copy of data. */ * avoiding a large copy of data. */
sdsrange(c->querybuf,pos,-1); sdsrange(c->querybuf,pos,-1);
pos = 0; pos = 0;
qblen = sdslen(c->querybuf);
/* Hint the sds library about the amount of bytes this string is /* Hint the sds library about the amount of bytes this string is
* going to contain. */ * going to contain. */
c->querybuf = sdsMakeRoomFor(c->querybuf,ll+2-sdslen(c->querybuf)); if (qblen < ll+2)
c->querybuf = sdsMakeRoomFor(c->querybuf,ll+2-qblen);
} }
c->bulklen = ll; c->bulklen = ll;
} }