# HG changeset patch
# User Ruslan Ermilov <ru@nginx.com>
# Date 1625479763 -10800
# Node ID 7f5e3595caff24ea3a5c400b8fe45ea33e2dfc8f
# Parent  e0fdd75871e40e4c57ed405cadb94235550142c9
Use only preallocated memory in ngx_readv_chain() (ticket #1408).

In d1bde5c3c5d2, the number of preallocated iovec's for ngx_readv_chain()
was increased.  Still, in some setups, the function might allocate memory
for iovec's from a connection pool, which is only freed when closing the
connection.

The ngx_readv_chain() function was modified to use only preallocated
memory, similarly to the ngx_writev_chain() change in 8e903522c17a.

diff --git a/src/os/unix/ngx_readv_chain.c b/src/os/unix/ngx_readv_chain.c
--- a/src/os/unix/ngx_readv_chain.c
+++ b/src/os/unix/ngx_readv_chain.c
@@ -96,7 +96,7 @@ ngx_readv_chain(ngx_connection_t *c, ngx
             iov->iov_len += n;
 
         } else {
-            if (vec.nelts >= IOV_MAX) {
+            if (vec.nelts == vec.nalloc) {
                 break;
             }