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Userid: ngx_http_get_indexed_variable() error handling.

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When evaluating a mapped $reset_uid variable in the userid filter,
if get_handler set to ngx_http_map_variable() returned an error,
this previously resulted in a NULL pointer dereference.
This commit is contained in:
Sergey Kandaurov 2017-06-07 18:46:36 +03:00
parent b0de3d7013
commit aa04b091ae
1 changed files with 4 additions and 0 deletions
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4
src/http/modules/ngx_http_userid_filter_module.c
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@ -472,6 +472,10 @@ ngx_http_userid_create_uid(ngx_http_request_t *r, ngx_http_userid_ctx_t *ctx,
vv = ngx_http_get_indexed_variable(r, ngx_http_userid_reset_index);
if (vv == NULL || vv->not_found) {
return NGX_ERROR;
}
if (vv->len == 0 || (vv->len == 1 && vv->data[0] == '0')) {
if (conf->mark == '\0'