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appletalk: Set error code if register_snap_client failed 

commit c93ad1337a upstream.

If register_snap_client fails in atalk_init,
error code should be set, otherwise it will
triggers NULL pointer dereference while unloading
module.

Fixes: 9804501fa1 ("appletalk: Fix potential NULL pointer dereference in unregister_snap_client")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
YueHaibing 2019-04-30 19:34:08 +08:00 committed by Greg Kroah-Hartman
parent 0977763a13
commit b136eeb65d
1 changed files with 1 additions and 0 deletions
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net/appletalk/ddp.c
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@ -1925,6 +1925,7 @@ static int __init atalk_init(void)
ddp_dl = register_snap_client(ddp_snap_id, atalk_rcv);
if (!ddp_dl) {
pr_crit("Unable to register DDP with SNAP.\n");
rc = -ENOMEM;
goto out_sock;
}