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Gzip: fixed "zero size buf" alerts after ac5a741d39cf.
After ac5a741d39cf it is now possible that after zstream.avail_out
reaches 0 and we allocate additional buffer, there will be no more data
to put into this buffer, triggering "zero size buf" alert. Fix is to
reset b->temporary flag in this case.
Additionally, an optimization added to avoid allocating additional buffer
in this case, by checking if last deflate() call returned Z_STREAM_END.
Note that checking for Z_STREAM_END by itself is not enough to fix alerts,
as deflate() can return Z_STREAM_END without producing any output if the
buffer is smaller than gzip trailer.
Reported by Witold Filipczyk,
http://mailman.nginx.org/pipermail/nginx-devel/2019-July/012469.html.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 31 Jul 2019 17:29:00 +0300 |
parents | f303f3e43f7b |
children |
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VER= $(shell grep 'define NGINX_VERSION' src/core/nginx.h \ | sed -e 's/^.*"\(.*\)".*/\1/') NGINX= nginx-$(VER) TEMP= tmp XSLS?= xslscript.pl all: changes changes: $(TEMP)/$(NGINX)/CHANGES.ru \ $(TEMP)/$(NGINX)/CHANGES $(TEMP)/$(NGINX)/CHANGES.ru: docs/dtd/changes.dtd \ docs/xml/nginx/changes.xml \ docs/xml/change_log_conf.xml \ docs/xslt/changes.xslt mkdir -p $(TEMP)/$(NGINX) xmllint --noout --valid docs/xml/nginx/changes.xml xsltproc --stringparam lang ru \ -o $@ docs/xslt/changes.xslt docs/xml/nginx/changes.xml $(TEMP)/$(NGINX)/CHANGES: docs/dtd/changes.dtd \ docs/xml/nginx/changes.xml \ docs/xml/change_log_conf.xml \ docs/xslt/changes.xslt mkdir -p $(TEMP)/$(NGINX) xmllint --noout --valid docs/xml/nginx/changes.xml xsltproc --stringparam lang en \ -o $@ docs/xslt/changes.xslt docs/xml/nginx/changes.xml docs/xslt/changes.xslt: docs/xsls/changes.xsls $(XSLS) -o $@ $<