Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-28 15:11:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

tipc: fix a potental access after delete in tipc_sk_join()

Browse Source 
In commit d12d2e12ce "tipc: send out join messages as soon as new
member is discovered") we added a call to the function tipc_group_join()
without considering the case that the preceding tipc_sk_publish() might
have failed, and the group item already deleted.

We fix this by returning from tipc_sk_join() directly after the
failed tipc_sk_publish.

Reported-by: syzbot+e3eeae78ea88b8d6d858@syzkaller.appspotmail.com
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Maloy 2018-01-10 21:08:50 +01:00 committed by David S. Miller
parent 2c76b34898
commit febafc8455
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/tipc/socket.c
View File

@ -2774,6 +2774,7 @@ static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq)
if (rc) {
tipc_group_delete(net, grp);
tsk->group = NULL;
return rc;
}
/* Eliminate any risk that a broadcast overtakes sent JOINs */
tsk->mc_method.rcast = true;