diff options
| author | Jon Maloy | 2018-04-03 19:11:19 +0200 |
|---|---|---|
| committer | David S. Miller | 2018-04-04 11:33:52 -0400 |
| commit | b714295abc59cfa2fe46f9341503d9a7eb790503 (patch) | |
| tree | 79ccd9dcbd8e0faac72c82cb718139d34a9f1511 /net/tipc | |
| parent | f51ffde9276e94fd4608dd7f5c6798fac41bb065 (diff) | |
tipc: Fix missing list initializations in struct tipc_subscription
When an item of struct tipc_subscription is created, we fail to
initialize the two lists aggregated into the struct. This has so far
never been a problem, since the items are just added to a root
object by list_add(), which does not require the addee list to be
pre-initialized. However, syzbot is provoking situations where this
addition fails, whereupon the attempted removal if the item from
the list causes a crash.
This problem seems to always have been around, despite that the code
for creating this object was rewritten in commit 242e82cc95f6 ("tipc:
collapse subscription creation functions"), which is still in net-next.
We fix this for that commit by initializing the two lists properly.
Fixes: 242e82cc95f6 ("tipc: collapse subscription creation functions")
Reported-by: syzbot+0bb443b74ce09197e970@syzkaller.appspotmail.com
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
| -rw-r--r-- | net/tipc/subscr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c index 6925a989569b..b7d80bc5f4ab 100644 --- a/net/tipc/subscr.c +++ b/net/tipc/subscr.c @@ -145,6 +145,8 @@ struct tipc_subscription *tipc_sub_subscribe(struct net *net, pr_warn("Subscription rejected, no memory\n"); return NULL; } + INIT_LIST_HEAD(&sub->service_list); + INIT_LIST_HEAD(&sub->sub_list); sub->net = net; sub->conid = conid; sub->inactive = false; |