tree 9f10542836be3f62381ee0826e143f0891eec5a5
parent a2d8ad20a3fbe121e4b5ba531b2fccc48a8b1a59
author Willy Tarreau <w@1wt.eu> 1661238090 +0200
committer Willy Tarreau <w@1wt.eu> 1661278751 +0200
encoding latin1

BUG/MEDIUM: applet: fix incorrect check for abnormal return condition from handler

We have quite numerous checks for abnormal applet handler behavior which
are supposed to trigger the loop protection. However, consecutive to
commit 15252cd9c ("MEDIUM: stconn: move the RXBLK flags to the stream
connector") that was merged into 2.6-dev12, one flag was incorrectly
renamed, and the check for an applet waiting for a buffer that is present
mistakenly turned to a check for missing room in the buffer. This erroneous
test could mistakenly trigger on applets that perform intensive I/Os doing
small exchanges each (e.g. cache, peers or HTTP client) if the load would
be sustained (>100k iops). For the cache this could represent higher than
13 Gbps on an object at least 1.6 GB large for example, which is quite
unlikely but theoretically possible.

This fix needs to be backported to 2.6.