Completing chained shared memory buffers.

After 41331471eee7 completion handlers should complete next buffer in chain.
Otherwise buffer memory may leak.

Thanks to Peter Tkatchenko for reporing the issue and testing fixes.

1 files changed, 14 insertions, 3 deletions

diff --git a/src/nxt_port_memory.c b/src/nxt_port_memory.c
index 24a40406..33d3777e 100644
--- a/src/nxt_port_memory.c
+++ b/src/nxt_port_memory.c
@@ -111,7 +111,7 @@ nxt_port_mmap_buf_completion(nxt_task_t *task, void *obj, void *data)
 {
     u_char                   *p;
     nxt_mp_t                 *mp;
-    nxt_buf_t                *b;
+    nxt_buf_t                *b, *next;
     nxt_port_t               *port;
     nxt_process_t            *process;
     nxt_chunk_id_t           c;
@@ -124,11 +124,12 @@ nxt_port_mmap_buf_completion(nxt_task_t *task, void *obj, void *data)
 
     b = obj;
 
-    mp = b->data;
-
     nxt_assert(data == b->parent);
 
     mmap_handler = data;
+
+complete_buf:
+
     hdr = mmap_handler->hdr;
 
     if (nxt_slow_path(hdr->src_pid != nxt_pid && hdr->dst_pid != nxt_pid)) {
@@ -184,8 +185,18 @@ release_buf:
 
     nxt_port_mmap_handler_use(mmap_handler, -1);
 
+    next = b->next;
+    mp = b->data;
+
     nxt_mp_free(mp, b);
     nxt_mp_release(mp);
+
+    if (next != NULL) {
+        b = next;
+        mmap_handler = b->parent;
+
+        goto complete_buf;
+    }
 }