id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
2140	nginx doesn't use the path specified by root directive as document_root in a location directive	stirwl@…		"server root is set to /usr/share/nginx/html
""location ~* \.php$"" root is set to /www/html;
But when constructing fastcgi_param SCRIPT_FILENAME, nginx is using /usr/share/nginx/html instead of /www/html. So that action.php can't be found.

attached is related config and error.log:
    server {
        listen       80;
        listen       [::]:80;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
                root /www/html;
                index index.html;
        }
        location ~* \.php$ {
                root /www/html;
                fastcgi_index   index.php;
                fastcgi_pass    unix:/run/php-fpm/www.sock;
                include         fastcgi_params;
                fastcgi_param   SCRIPT_FILENAME    $document_root$fastcgi_script_name;
        }

2021/02/20 22:20:32 [debug] 90122#0: *1 http script copy: ""SCRIPT_FILENAME""
2021/02/20 22:20:32 [debug] 90122#0: *1 http script var: ""/usr/share/nginx/html""
2021/02/20 22:20:32 [debug] 90122#0: *1 http script var: ""/action.php""
2021/02/20 22:20:32 [debug] 90122#0: *1 fastcgi param: ""SCRIPT_FILENAME: /usr/share/nginx/html/action.php""
"	defect	closed	minor		documentation	1.18.x	invalid	root document_root fastcgi_param	stirwl@…	Linux fedora 5.7.11-200.fc32.x86_64 #1 SMP Wed Jul 29 17:15:52 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.18.0
built by gcc 10.0.1 20200328 (Red Hat 10.0.1-0.11) (GCC)
built with OpenSSL 1.1.1d FIPS  10 Sep 2019 (running with OpenSSL 1.1.1g FIPS  21 Apr 2020)
TLS SNI support enabled
configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/run/nginx.pid --lock-path=/run/lock/subsys/nginx --user=nginx --group=nginx --with-file-aio --with-ipv6 --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-stream_ssl_preread_module --with-http_addition_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_slice_module --with-http_stub_status_module --with-http_perl_module=dynamic --with-http_auth_request_module --with-mail=dynamic --with-mail_ssl_module --with-pcre --with-pcre-jit --with-stream=dynamic --with-stream_ssl_module --with-google_perftools_module --with-debug --with-cc-opt='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' --with-ld-opt='-Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E'"