tree 162ea9744a8423734734b5beadaec8bab2a83528
parent ea7a7781a94addb9fb18ef8064c96d73fe5add3d
author Christopher Faulet <cfaulet@haproxy.com> 1569508708 +0200
committer Christopher Faulet <cfaulet@haproxy.com> 1569509462 +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.