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HTTP/3: skip empty request body buffers (ticket #2374).
When client DATA frame header and its content come in different QUIC packets,
it may happen that only the header is processed by the first
ngx_http_v3_request_body_filter() call. In this case an empty request body
buffer is added to r->request_body->bufs, which is later reused in a
subsequent ngx_http_v3_request_body_filter() call without being removed from
the body chain. As a result, rb->request_body->bufs ends up with two copies of
the same buffer.
The fix is to avoid adding empty request body buffers to r->request_body->bufs.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 03 Aug 2022 16:59:51 +0400 |
parents | d620f497c50f |
children |
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/ / Copyright (C) Igor Sysoev / Copyright (C) Nginx, Inc. / / "casa [%o2] 0x80, %o1, %o0" and / "casxa [%o2] 0x80, %o1, %o0" do the following: / / if ([%o2] == %o1) { / swap(%o0, [%o2]); / } else { / %o0 = [%o2]; / } / ngx_atomic_uint_t ngx_casa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, / ngx_atomic_t *lock); / / the arguments are passed in the %o0, %o1, %o2 / the result is returned in the %o0 .inline ngx_casa,0 casa [%o2] 0x80, %o1, %o0 .end / ngx_atomic_uint_t ngx_casxa(ngx_atomic_uint_t set, ngx_atomic_uint_t old, / ngx_atomic_t *lock); / / the arguments are passed in the %o0, %o1, %o2 / the result is returned in the %o0 .inline ngx_casxa,0 casxa [%o2] 0x80, %o1, %o0 .end