1 commit d9a130e1962c2a5352f33088c563f4248a102c48
2 Author: Willy Tarreau <w@1wt.eu>
3 Date: Fri Aug 24 15:48:59 2018 +0200
5 BUG/MEDIUM: mux_pt: dereference the connection with care in mux_pt_wake()
7 mux_pt_wake() calls data->wake() which can return -1 indicating that the
8 connection was just destroyed. We need to check for this condition and
9 immediately exit in this case otherwise we dereference a just freed
10 connection. Note that this mainly happens on idle connections between
11 two HTTP requests. It can have random implications between requests as
12 it may lead a wrong connection's polling to be re-enabled or disabled
13 for example, especially with threads.
15 This patch must be backported to 1.8.
17 (cherry picked from commit ad7f0ad1c3c9c541a4c315b24d4500405d1383ee)
18 Signed-off-by: Willy Tarreau <w@1wt.eu>
20 diff --git a/src/mux_pt.c b/src/mux_pt.c
21 index a68b9621..c43e30f2 100644
24 @@ -51,6 +51,9 @@ static int mux_pt_wake(struct connection *conn)
26 ret = cs->data_cb->wake ? cs->data_cb->wake(cs) : 0;
31 /* If we had early data, and we're done with the handshake
32 * then whe know the data are safe, and we can remove the flag.