commit f4e7b5dd0c3d25aaefc0dada4cbe4e53529329a2
author Ruslan Ermilov <ru@nginx.com> Mon Jul 05 13:09:23 2021 +0300
committer Ruslan Ermilov <ru@nginx.com> Mon Jul 05 13:09:23 2021 +0300
tree fb26ffe1c925aaef7456a7bc292b76ce5da4c8a5
parent 075141f08b1f7c3a8abbe72d4495f599cfa4879c

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.

src/os/unix/ngx_readv_chain.c

diff --git a/src/os/unix/ngx_readv_chain.c b/src/os/unix/ngx_readv_chain.c
index a3577ce..b1ae4b5 100644
--- a/src/os/unix/ngx_readv_chain.c
+++ b/src/os/unix/ngx_readv_chain.c
@@ -96,7 +96,7 @@
             iov->iov_len += n;
 
         } else {
-            if (vec.nelts >= IOV_MAX) {
+            if (vec.nelts == vec.nalloc) {
                 break;
             }