commit ca50fb4f81a1f48c82d75825687085cda4627424 Author: Nick Mathewson nickm@torproject.org Date: Tue Mar 19 16:35:40 2013 -0400

Don't assert when writing a cell to a CLOSING connection.

Instead, drop the cell.

Fixes another case of bug 7350; bugfix on 0.2.4.4-alpha --- changes/bug7350 | 4 ++++ src/or/channel.c | 24 ++++++++++++++++++++++++ 2 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/changes/bug7350 b/changes/bug7350 new file mode 100644 index 0000000..b0ee9d0 --- /dev/null +++ b/changes/bug7350 @@ -0,0 +1,4 @@ + o Major bugfixes: + - Avoid an assertion when we discover that we'd like to write a cell + onto a closing connection: just discard the cell. Fixes another + case of bug 7350; bugfix on 0.2.4.4-alpha. diff --git a/src/or/channel.c b/src/or/channel.c index 82db061..4e9086f 100644 --- a/src/or/channel.c +++ b/src/or/channel.c @@ -1751,6 +1751,14 @@ channel_write_cell(channel_t *chan, cell_t *cell) tor_assert(chan); tor_assert(cell);

+ if (chan->state == CHANNEL_STATE_CLOSING) { + log_debug(LD_CHANNEL, "Discarding cell_t %p on closing channel %p with " + "global ID "U64_FORMAT, cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + tor_free(cell); + return; + } + log_debug(LD_CHANNEL, "Writing cell_t %p to channel %p with global ID " U64_FORMAT, @@ -1777,6 +1785,14 @@ channel_write_packed_cell(channel_t *chan, packed_cell_t *packed_cell) tor_assert(chan); tor_assert(packed_cell);

+ if (chan->state == CHANNEL_STATE_CLOSING) { + log_debug(LD_CHANNEL, "Discarding packed_cell_t %p on closing channel %p " + "with global ID "U64_FORMAT, packed_cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + packed_cell_free(packed_cell); + return; + } + log_debug(LD_CHANNEL, "Writing packed_cell_t %p to channel %p with global ID " U64_FORMAT, @@ -1805,6 +1821,14 @@ channel_write_var_cell(channel_t *chan, var_cell_t *var_cell) tor_assert(chan); tor_assert(var_cell);

+ if (chan->state == CHANNEL_STATE_CLOSING) { + log_debug(LD_CHANNEL, "Discarding var_cell_t %p on closing channel %p " + "with global ID "U64_FORMAT, var_cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + var_cell_free(var_cell); + return; + } + log_debug(LD_CHANNEL, "Writing var_cell_t %p to channel %p with global ID " U64_FORMAT,