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-rw-r--r--src/core/ngx_inet.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/core/ngx_inet.c b/src/core/ngx_inet.c
index cfc06e48d..a6ce9f395 100644
--- a/src/core/ngx_inet.c
+++ b/src/core/ngx_inet.c
@@ -407,6 +407,10 @@ ngx_ptocidr(ngx_str_t *text, ngx_cidr_t *cidr)
#if (NGX_HAVE_INET6)
case AF_INET6:
+ if (shift > 128) {
+ return NGX_ERROR;
+ }
+
addr = cidr->u.in6.addr.s6_addr;
mask = cidr->u.in6.mask.s6_addr;
rc = NGX_OK;
@@ -428,6 +432,9 @@ ngx_ptocidr(ngx_str_t *text, ngx_cidr_t *cidr)
#endif
default: /* AF_INET */
+ if (shift > 32) {
+ return NGX_ERROR;
+ }
if (shift) {
cidr->u.in.mask = htonl((ngx_uint_t) (0 - (1 << (32 - shift))));