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| author | Jon Maloy <jon.maloy@ericsson.com> | 2018-01-10 21:08:50 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-15 19:43:51 +0100 |
| commit | febafc8455fdbb0ba53d596075068a683b75f355 (patch) | |
| tree | dd63648d661c0f053d2c5c1015fb6cce8e7e9969 | |
| parent | Merge branch 'dsa-lan9303-check-error-value-from-devm_gpiod_get_optional' (diff) | |
| download | linux-febafc8455fdbb0ba53d596075068a683b75f355.tar.xz linux-febafc8455fdbb0ba53d596075068a683b75f355.zip | |
tipc: fix a potental access after delete in tipc_sk_join()
In commit d12d2e12cec2 "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>
| -rw-r--r-- | net/tipc/socket.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 1f236271766c..f38264db45ae 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -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; |