From f178835bfa2f59c59186c9ffa967d412df7f2339 Mon Sep 17 00:00:00 2001 From: Maxim Dounin Date: Sun, 16 Aug 2015 10:51:16 +0300 Subject: [PATCH] Fixed segfault with try_files introduced by c985d90a8d1f. If alias was used in a location given by a regular expression, nginx used to do wrong thing in try_files if a location name (i.e., regular expression) was an exact prefix of URI. The following configuration triggered a segmentation fault on a request to "/mail": location ~ /mail { alias /path/to/directory; try_files $uri =404; } Reported by Per Hansson. --- src/http/ngx_http_core_module.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c index 096a561c4..9d502acf5 100644 --- a/src/http/ngx_http_core_module.c +++ b/src/http/ngx_http_core_module.c @@ -1272,7 +1272,9 @@ ngx_http_core_try_files_phase(ngx_http_request_t *r, *e.pos = '\0'; - if (alias && ngx_strncmp(name, clcf->name.data, alias) == 0) { + if (alias && alias != NGX_MAX_SIZE_T_VALUE + && ngx_strncmp(name, clcf->name.data, alias) == 0) + { ngx_memmove(name, name + alias, len - alias); path.len -= alias; }