commit 79279b6a61e8685e6d3e030768620665e32cb296
author Sergey Kandaurov <pluknet@nginx.com> Mon Aug 19 15:16:06 2019 +0300
committer Sergey Kandaurov <pluknet@nginx.com> Mon Aug 19 15:16:06 2019 +0300
tree 9f4f5eb35871d230cb084226c132f25f20b1fe0d
parent f2902bb860dcee1b007a44a62485775806043d48

HTTP/2: discard remaining request body after redirect.

Previously, if unbuffered request body reading wasn't finished before
the request was redirected to a different location using error_page
or X-Accel-Redirect, and the request body is read again, this could
lead to disastrous effects, such as a duplicate post_handler call or
"http request count is zero" alert followed by a segmentation fault.

This happened in the following configuration (ticket #1819):

    location / {
        proxy_request_buffering off;
        proxy_pass http://bad;
        proxy_intercept_errors on;
        error_page 502 = /error;
    }

    location /error {
        proxy_pass http://backend;
    }