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drbd: fix NULL pointer deref in module init error path

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If we want to iterate over the (as of yet still empty) list in the
cleanup path, we need to initialize the list before the first goto fail.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Lars Ellenberg 2013-10-23 10:59:15 +02:00 committed by Jens Axboe
parent 7badfb1c34
commit 69babf05cb
1 changed files with 9 additions and 10 deletions
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19
drivers/block/drbd/drbd_main.c
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@ -2750,13 +2750,6 @@ int __init drbd_init(void)
return err;
}
err = drbd_genl_register();
if (err) {
printk(KERN_ERR "drbd: unable to register generic netlink family\n");
goto fail;
}
register_reboot_notifier(&drbd_notifier);
/*
@ -2767,6 +2760,15 @@ int __init drbd_init(void)
drbd_proc = NULL; /* play safe for drbd_cleanup */
idr_init(&minors);
rwlock_init(&global_state_lock);
INIT_LIST_HEAD(&drbd_tconns);
err = drbd_genl_register();
if (err) {
printk(KERN_ERR "drbd: unable to register generic netlink family\n");
goto fail;
}
err = drbd_create_mempools();
if (err)
goto fail;
@ -2778,9 +2780,6 @@ int __init drbd_init(void)
goto fail;
}
rwlock_init(&global_state_lock);
INIT_LIST_HEAD(&drbd_tconns);
retry.wq = create_singlethread_workqueue("drbd-reissue");
if (!retry.wq) {
printk(KERN_ERR "drbd: unable to create retry workqueue\n");