commit 88489cd29006f093e1a5572711b26ee1b057e359 Author: David Goulet dgoulet@torproject.org Date: Tue Feb 4 10:13:10 2020 -0500

hs-v3: Remove BUG() that can occur normally

Fixes #28992

Signed-off-by: David Goulet dgoulet@torproject.org --- changes/ticket28992 | 3 +++ src/feature/hs/hs_client.c | 11 ++++++++--- 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/changes/ticket28992 b/changes/ticket28992 new file mode 100644 index 000000000..3e45d73e4 --- /dev/null +++ b/changes/ticket28992 @@ -0,0 +1,3 @@ + o Minor bugfixes (onion service v3, client): + - Remove a BUG() that is causing a stacktrace for a situation that very + rarely happens but still can. Fixes bug 28992; bugfix on 0.3.2.1-alpha. diff --git a/src/feature/hs/hs_client.c b/src/feature/hs/hs_client.c index fd2d26645..b045e1899 100644 --- a/src/feature/hs/hs_client.c +++ b/src/feature/hs/hs_client.c @@ -596,9 +596,14 @@ send_introduce1(origin_circuit_t *intro_circ, /* We need to find which intro point in the descriptor we are connected to * on intro_circ. */ ip = find_desc_intro_point_by_ident(intro_circ->hs_ident, desc); - if (BUG(ip == NULL)) { - /* If we can find a descriptor from this introduction circuit ident, we - * must have a valid intro point object. Permanent error. */ + if (ip == NULL) { + /* The following is possible if the descriptor was changed while we had + * this introduction circuit open and waiting for the rendezvous circuit to + * be ready. Which results in this situation where we can't find the + * corresponding intro point within the descriptor of the service. */ + log_info(LD_REND, "Unable to find introduction point for service %s " + "while trying to send an INTRODUCE1 cell.", + safe_str_client(onion_address)); goto perm_err; }