tree b9468042f87b96233dd55f27a6ab4fbefc5dcbb8
parent 0342705074569b5558036101f0bd0e00eab56632
author Christopher Faulet <cfaulet@haproxy.com> 1569508708 +0200
committer Christopher Faulet <cfaulet@haproxy.com> 1569578164 +0200

BUG/MAJOR: mux_h2: Don't consume more payload than received for skipped frames

When a frame is received for a unknown or already closed stream, it must be
skipped. This also happens when a stream error is reported. But we must be sure
to only skip received data. In the loop in h2_process_demux(), when such frames
are handled, all the frame lenght is systematically skipped. If the frame
payload is partially received, it leaves the demux buffer in an undefined
state. Because of this bug, all sort of errors may be observed, like crash or
intermittent freeze.

This patch must be backported to 2.0, 1.9 and 1.8.

(cherry picked from commit 5112a603d9507cac84ae544863251e814e5eb8d8)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>