commit a68efea421859304e4e4859ca549545ae4d232df
author Maxim Dounin <mdounin@mdounin.ru> Mon Jul 02 19:02:08 2018 +0300
committer Maxim Dounin <mdounin@mdounin.ru> Mon Jul 02 19:02:08 2018 +0300
tree 9a8a5ec584bb7838390aac34084dd338d46c450b
parent c804c408d0bc1c6a3805337cd898113d72aa3282

gRPC: clearing buffers in ngx_http_grpc_get_buf().

We copy input buffers to our buffers, so various flags might be
unexpectedly set in buffers returned by ngx_chain_get_free_buf().

In particular, the b->in_file flag might be set when the body was
written to a file in a different context.  With sendfile enabled this
in turn might result in protocol corruption if such a buffer was reused
for a control frame.

Make sure to clear buffers and set only fields we really need to be set.