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diff src/http/ngx_http_upstream.c @ 7067:e3723f2a11b7

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Parenthesized ASCII-related calculations. This also fixes potential undefined behaviour in the range and slice filter modules, caused by local overflows of signed integers in expressions.
author Valentin Bartenev <vbart@nginx.com>
date Mon, 17 Jul 2017 17:23:51 +0300
parents bd2f97a3aecc
children f583559aadc7
line wrap: on
line diff
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -4503,7 +4503,7 @@ ngx_http_upstream_process_cache_control(
             }
 
             if (*p >= '0' && *p <= '9') {
-                n = n * 10 + *p - '0';
+                n = n * 10 + (*p - '0');
                 continue;
             }
 
@@ -4531,7 +4531,7 @@ ngx_http_upstream_process_cache_control(
             }
 
             if (*p >= '0' && *p <= '9') {
-                n = n * 10 + *p - '0';
+                n = n * 10 + (*p - '0');
                 continue;
             }
 
@@ -4554,7 +4554,7 @@ ngx_http_upstream_process_cache_control(
             }
 
             if (*p >= '0' && *p <= '9') {
-                n = n * 10 + *p - '0';
+                n = n * 10 + (*p - '0');
                 continue;
             }