memory leak in garp_request

memory leak in garp_request_join
Status: upstream: reported C repro on 2020/01/27 19:27
Reported-by: syzbot+13ad608e190b5f8ad8a8@syzkaller.appspotmail.com
First crash: 29d, last: 10h54m

Sample crash report:

BUG: memory leak
unreferenced object 0xffff888122d645c0 (size 64):
  comm "syz-executor266", pid 6997, jiffies 4294943845 (age 8.380s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 08 00 00 00 01 02 00 00  ................
  backtrace:
    [<00000000b8fc3bc2>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000b8fc3bc2>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000b8fc3bc2>] slab_alloc mm/slab.c:3320 [inline]
    [<00000000b8fc3bc2>] __do_kmalloc mm/slab.c:3654 [inline]
    [<00000000b8fc3bc2>] __kmalloc+0x169/0x300 mm/slab.c:3665
    [<0000000009a51af2>] kmalloc include/linux/slab.h:560 [inline]
    [<0000000009a51af2>] garp_attr_create net/802/garp.c:187 [inline]
    [<0000000009a51af2>] garp_request_join+0x132/0x1f0 net/802/garp.c:350
    [<000000004657c121>] vlan_gvrp_request_join+0x86/0x90 net/8021q/vlan_gvrp.c:34
    [<00000000af746b44>] vlan_dev_open+0x173/0x290 net/8021q/vlan_dev.c:290
    [<000000004df33665>] __dev_open+0x109/0x1b0 net/core/dev.c:1431
    [<00000000bfab6bf6>] __dev_change_flags+0x246/0x2c0 net/core/dev.c:8153
    [<000000002d2b3bce>] rtnl_configure_link+0x57/0x100 net/core/rtnetlink.c:3001
    [<0000000077281daa>] __rtnl_newlink+0x8bc/0xb80 net/core/rtnetlink.c:3337
    [<000000008897a815>] rtnl_newlink+0x4e/0x80 net/core/rtnetlink.c:3377
    [<00000000373370a2>] rtnetlink_rcv_msg+0x178/0x4b0 net/core/rtnetlink.c:5438
    [<00000000d070b77b>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2477
    [<00000000dfeafbec>] rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5456
    [<0000000090038ee4>] netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
    [<0000000090038ee4>] netlink_unicast+0x223/0x310 net/netlink/af_netlink.c:1328
    [<000000005a0f2d71>] netlink_sendmsg+0x2c0/0x570 net/netlink/af_netlink.c:1917
    [<00000000377e5684>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<00000000377e5684>] sock_sendmsg+0x54/0x70 net/socket.c:672
    [<000000001442c059>] ____sys_sendmsg+0x2d0/0x300 net/socket.c:2343

Crashes (27):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2020/02/21 14:35	upstream	ca7e1fd1	bd2a74a3	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/19 08:42	upstream	2b72104b	135c18aa	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/17 03:50	upstream	11a48a5a	1f448cd6	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/15 11:39	upstream	2019fc96	5d7b90f1	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/14 11:56	upstream	b19e8c68	5d7b90f1	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/12 22:11	upstream	f2850dd5	84f4fc8a	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/12 08:25	upstream	359c92c0	a75b198c	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/11 06:54	upstream	0a679e13	084454ae	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/10 03:00	upstream	d1ea35f4	35f5e45e	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/09 13:30	upstream	fdfa3a67	6ece2ea5	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/05 01:50	upstream	33b40134	93e5e335	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/03 22:33	upstream	754beeec	93e5e335	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/02 23:00	upstream	46d6b7be	93e5e335	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/02 17:25	upstream	94f2630b	93e5e335	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/01 19:34	upstream	26dca6db	0eb59c27	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/01 18:43	upstream	26dca6db	0eb59c27	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/02/01 05:12	upstream	ccaaaf6f	c30117b2	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/31 15:37	upstream	ccaaaf6f	5ed23f9a	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/31 02:33	upstream	9f68e365	5ed23f9a	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/30 13:56	upstream	39bed42d	5ed23f9a	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/27 19:02	upstream	d5226fa6	dd56146d	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/26 23:57	upstream	a45ea48e	dd56146d	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/26 22:57	upstream	a45ea48e	dd56146d	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/26 22:21	upstream	a45ea48e	dd56146d	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/26 04:15	upstream	2821e26f	f4e7270e	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/25 14:18	upstream	d5d359b0	2e95ab33	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-gce-leak	2020/01/23 19:24	upstream	131701c6	3334d684	.config	log	report	syz	C	allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, info@metux.net, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de