diff options
author | Maxim Dounin <mdounin@mdounin.ru> | 2016-05-31 05:13:30 +0300 |
---|---|---|
committer | Maxim Dounin <mdounin@mdounin.ru> | 2016-05-31 05:13:30 +0300 |
commit | a3d382397a00853cf07b21d07fe10a4c10b88244 (patch) | |
tree | fc6a343b25c01887202a358e32c52f5615081909 /src/http/ngx_http_request.c | |
parent | 9f0253e1e2dcfad7d81f49877228b864c617c9fa (diff) | |
download | nginx-a3d382397a00853cf07b21d07fe10a4c10b88244.tar.gz nginx-a3d382397a00853cf07b21d07fe10a4c10b88244.zip |
Core: skip special buffers on writing (ticket #981).
A special last buffer with cl->buf->pos set to NULL can be present in
a chain when writing request body if chunked encoding was used. This
resulted in a NULL pointer dereference if it happened to be the only
buffer left after a do...while loop iteration in ngx_write_chain_to_file().
The problem originally appeared in nginx 1.3.9 with chunked encoding
support. Additionally, rev. 3832b608dc8d (nginx 1.9.13) changed the
minimum number of buffers to trigger this from IOV_MAX (typically 1024)
to NGX_IOVS_PREALLOCATE (typically 64).
Fix is to skip such buffers in ngx_chain_to_iovec(), much like it is
done in other places.
Diffstat (limited to 'src/http/ngx_http_request.c')
0 files changed, 0 insertions, 0 deletions