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Upstream: ngx_post_event() instead of upgraded call (ticket #503). 

If a request is finalized in the first call to the
ngx_http_upstream_process_upgraded() function, e.g., because upstream
server closed the connection for some reason, in the second call
the u->peer.connection pointer will be null, resulting in segmentation
fault.

Fix is to avoid second direct call, and post event instead.  This ensures
that ngx_http_upstream_process_upgraded() won't be called again if
a request is finalized.
This commit is contained in:
Maxim Dounin 2014-02-18 17:30:40 +04:00
parent 934095dd34
commit df150c6b8b
1 changed files with 2 additions and 0 deletions
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2
src/http/ngx_http_upstream.c
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@ -2456,7 +2456,9 @@ ngx_http_upstream_upgrade(ngx_http_request_t *r, ngx_http_upstream_t *u)
if (u->peer.connection->read->ready
|| u->buffer.pos != u->buffer.last)
{
ngx_post_event(c->read, &ngx_posted_events);
ngx_http_upstream_process_upgraded(r, 1, 1);
return;
}
ngx_http_upstream_process_upgraded(r, 0, 1);