commit 938ee9b24dfda03a68a71d43b88e9fb00a90f9c8 Author: Andrea Shepard andrea@torproject.org Date: Mon Sep 23 09:37:26 2013 -0700

Always call circuit_n_chan_done(chan, 0) from channel_closed() --- changes/bug9776 | 5 +++++ src/or/channel.c | 9 ++++----- src/or/connection_or.c | 10 ++++++++++ 3 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/changes/bug9776 b/changes/bug9776 new file mode 100644 index 0000000..ea3a96a --- /dev/null +++ b/changes/bug9776 @@ -0,0 +1,5 @@ + o Normal bugfixes: + - Always call circuit_n_chan_done(chan, 0) from channel_closed(), so we + can't leak pending circuits in some cases where + run_connection_housekeeping() calls connection_or_close_normally(). + Fixes bug #9776; bugfix on 0.2.4.17. diff --git a/src/or/channel.c b/src/or/channel.c index 602797d..1fb39b8 100644 --- a/src/or/channel.c +++ b/src/or/channel.c @@ -1292,11 +1292,10 @@ channel_closed(channel_t *chan) if (chan->state == CHANNEL_STATE_CLOSED || chan->state == CHANNEL_STATE_ERROR) return;

- if (chan->reason_for_closing == CHANNEL_CLOSE_FOR_ERROR) { - /* Inform any pending (not attached) circs that they should - * give up. */ - circuit_n_chan_done(chan, 0); - } + /* Inform any pending (not attached) circs that they should + * give up. */ + circuit_n_chan_done(chan, 0); + /* Now close all the attached circuits on it. */ circuit_unlink_all_from_channel(chan, END_CIRC_REASON_CHANNEL_CLOSED);

diff --git a/src/or/connection_or.c b/src/or/connection_or.c index 0e9d06a..3d16e14 100644 --- a/src/or/connection_or.c +++ b/src/or/connection_or.c @@ -1160,6 +1160,16 @@ connection_or_connect(const tor_addr_t *_addr, uint16_t port,

/** Mark orconn for close and transition the associated channel, if any, to * the closing state. + * + * It's safe to call this and connection_or_close_for_error() any time, and + * channel layer will treat it as a connection closing for reasons outside + * its control, like the remote end closing it. It can also be a local + * reason that's specific to connection_t/or_connection_t rather than + * the channel mechanism, such as expiration of old connections in + * run_connection_housekeeping(). If you want to close a channel_t + * from somewhere that logically works in terms of generic channels + * rather than connections, use channel_mark_for_close(); see also + * the comment on that function in channel.c. */

void