From 7cc25f6c9ba1622c0e2c1186bb47fca8de03672b Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Mon, 30 Nov 2020 11:56:15 +0100 Subject: [PATCH] can-host: Fix crash when 'canbus' property is not set Providing the 'if' property, but not 'canbus' segfaults like this: #0 0x0000555555b0f14d in can_bus_insert_client (bus=0x0, client=0x555556aa9af0) at ../net/can/can_core.c:88 #1 0x00005555559c3803 in can_host_connect (ch=0x555556aa9ac0, errp=0x7fffffffd568) at ../net/can/can_host.c:62 #2 0x00005555559c386a in can_host_complete (uc=0x555556aa9ac0, errp=0x7fffffffd568) at ../net/can/can_host.c:72 #3 0x0000555555d52de9 in user_creatable_complete (uc=0x555556aa9ac0, errp=0x7fffffffd5c8) at ../qom/object_interfaces.c:23 Add the missing NULL check. Signed-off-by: Kevin Wolf Message-Id: <20201130105615.21799-5-kwolf@redhat.com> Signed-off-by: Kevin Wolf --- net/can/can_host.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/can/can_host.c b/net/can/can_host.c index be4547d91348..ba7f163d0a00 100644 --- a/net/can/can_host.c +++ b/net/can/can_host.c @@ -53,6 +53,11 @@ static void can_host_connect(CanHostState *ch, Error **errp) CanHostClass *chc = CAN_HOST_GET_CLASS(ch); Error *local_err = NULL; + if (ch->bus == NULL) { + error_setg(errp, "'canbus' property not set"); + return; + } + chc->connect(ch, &local_err); if (local_err) { error_propagate(errp, local_err);