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: 358d, last: 12h47m

Patch testing requests:
Created	Duration	User	Repo	Result
2020/08/16 23:40	7m	xiyou.wangcong@gmail.com	https://github.com/congwang/linux.git vlan	report log
2020/08/16 22:02	7m	xiyou.wangcong@gmail.com	https://github.com/congwang/linux.git net	report log
2020/08/16 19:36	7m	xiyou.wangcong@gmail.com	https://github.com/congwang/linux.git net	report log

Sample crash report:

BUG: memory leak
unreferenced object 0xffff888113d69a80 (size 64):
  comm "syz-executor904", pid 8680, jiffies 4294942248 (age 8.050s)
  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 03  ................
  backtrace:
    [<000000006d144268>] kmalloc include/linux/slab.h:557 [inline]
    [<000000006d144268>] garp_attr_create net/802/garp.c:187 [inline]
    [<000000006d144268>] garp_request_join+0x138/0x220 net/802/garp.c:350
    [<00000000b13f4b39>] vlan_gvrp_request_join+0x96/0xa0 net/8021q/vlan_gvrp.c:34
    [<000000008b03f24d>] vlan_dev_open+0x1f9/0x330 net/8021q/vlan_dev.c:289
    [<000000006aa5d3bd>] __dev_open+0x175/0x260 net/core/dev.c:1528
    [<0000000097604f8b>] __dev_change_flags+0x2fd/0x390 net/core/dev.c:8478
    [<00000000fb403690>] rtnl_configure_link+0x64/0x130 net/core/rtnetlink.c:3125
    [<00000000760a45df>] __rtnl_newlink+0xa84/0xd80 net/core/rtnetlink.c:3451
    [<0000000037d34de3>] rtnl_newlink+0x49/0x70 net/core/rtnetlink.c:3491
    [<0000000090ecea66>] rtnetlink_rcv_msg+0x1fc/0x520 net/core/rtnetlink.c:5553
    [<00000000d8691375>] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2494
    [<000000003571643a>] netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
    [<000000003571643a>] netlink_unicast+0x392/0x4c0 net/netlink/af_netlink.c:1330
    [<00000000b40f820a>] netlink_sendmsg+0x368/0x6a0 net/netlink/af_netlink.c:1919
    [<00000000b0573f3f>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<00000000b0573f3f>] sock_sendmsg+0x56/0x80 net/socket.c:672
    [<00000000e012da6f>] ____sys_sendmsg+0x36c/0x390 net/socket.c:2345
    [<000000001e68a40e>] ___sys_sendmsg+0x8b/0xd0 net/socket.c:2399
    [<000000004bcddbf7>] __sys_sendmsg+0x88/0x100 net/socket.c:2432

BUG: memory leak
unreferenced object 0xffff888113d69a40 (size 64):
  comm "syz-executor904", pid 8680, jiffies 4294942248 (age 8.050s)
  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 01 00 00 00 01 02 00 03  ................
  backtrace:
    [<000000006df9ee39>] kmalloc include/linux/slab.h:557 [inline]
    [<000000006df9ee39>] mrp_attr_create net/802/mrp.c:276 [inline]
    [<000000006df9ee39>] mrp_request_join+0x153/0x260 net/802/mrp.c:530
    [<0000000098378550>] vlan_mvrp_request_join+0x96/0xa0 net/8021q/vlan_mvrp.c:40
    [<00000000d458b5f1>] vlan_dev_open+0x1e7/0x330 net/8021q/vlan_dev.c:292
    [<000000006aa5d3bd>] __dev_open+0x175/0x260 net/core/dev.c:1528
    [<0000000097604f8b>] __dev_change_flags+0x2fd/0x390 net/core/dev.c:8478
    [<00000000fb403690>] rtnl_configure_link+0x64/0x130 net/core/rtnetlink.c:3125
    [<00000000760a45df>] __rtnl_newlink+0xa84/0xd80 net/core/rtnetlink.c:3451
    [<0000000037d34de3>] rtnl_newlink+0x49/0x70 net/core/rtnetlink.c:3491
    [<0000000090ecea66>] rtnetlink_rcv_msg+0x1fc/0x520 net/core/rtnetlink.c:5553
    [<00000000d8691375>] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2494
    [<000000003571643a>] netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
    [<000000003571643a>] netlink_unicast+0x392/0x4c0 net/netlink/af_netlink.c:1330
    [<00000000b40f820a>] netlink_sendmsg+0x368/0x6a0 net/netlink/af_netlink.c:1919
    [<00000000b0573f3f>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<00000000b0573f3f>] sock_sendmsg+0x56/0x80 net/socket.c:672
    [<00000000e012da6f>] ____sys_sendmsg+0x36c/0x390 net/socket.c:2345
    [<000000001e68a40e>] ___sys_sendmsg+0x8b/0xd0 net/socket.c:2399
    [<000000004bcddbf7>] __sys_sendmsg+0x88/0x100 net/socket.c:2432

Crashes (350):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2021/01/15 09:01	upstream	14662050	65a7a854	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2021/01/13 06:59	upstream	e609571b	0cdd6185	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2021/01/12 14:07	upstream	a0d54b4f	2c1f2513	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2021/01/11 17:31	upstream	7c53f6b6	2c1f2513	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2021/01/11 02:22	upstream	0653161f	2c1f2513	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2021/01/10 12:30	upstream	2ff90100	2c1f2513	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2021/01/03 18:25	upstream	3516bd72	79264ae3	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2021/01/03 17:22	upstream	3516bd72	79264ae3	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2021/01/02 04:53	upstream	eda809ae	79264ae3	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/27 05:12	upstream	f838f8d2	821e0b09	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/24 10:50	upstream	58cf05f5	c2c1d1dd	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/22 11:51	upstream	8653b778	04201c06	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/22 09:11	upstream	8653b778	04201c06	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/21 06:35	upstream	6a447b0e	04201c06	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/21 03:01	upstream	6a447b0e	04201c06	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/20 10:52	upstream	467f8165	04201c06	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/18 09:48	upstream	d64c6f96	04201c06	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/16 23:19	upstream	5e60366d	04201c06	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/15 23:15	upstream	148842c9	97183ed7	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/14 17:03	upstream	2c85ebc5	97183ed7	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/12 15:51	upstream	7f376f19	bca53db9	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/11 17:48	upstream	33dc9614	ba24ffcd	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/11 01:16	upstream	a2f5ea9e	f900b48c	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/10 03:17	upstream	a68a0262	c090b4da	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/10 02:27	upstream	a68a0262	c090b4da	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/08 23:00	upstream	cd796ed3	a7f7f4a4	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/08 09:03	upstream	cd796ed3	51a9082e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/08 02:45	upstream	cd796ed3	51a9082e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/07 14:30	upstream	0477e928	1190297f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/06 13:43	upstream	33256ce1	f12ba0c5	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/05 20:42	upstream	b3298500	50503117	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/03 21:53	upstream	34816d20	e6b0d314	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/03 12:27	upstream	34816d20	e6b0d314	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/03 08:18	upstream	3bb61aa6	8c9190ef	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/12/03 07:39	upstream	3bb61aa6	8c9190ef	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/29 09:09	upstream	45e885c4	a0092f9d	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/28 20:05	upstream	c84e1efa	76b4dcc7	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/28 18:24	upstream	c84e1efa	76b4dcc7	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/27 00:04	upstream	4df91062	1d2b823e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/26 19:24	upstream	fa02fcd9	1d2b823e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/26 06:16	upstream	fa02fcd9	2f1cec62	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/25 09:50	upstream	127c501a	1a1f4bd8	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/21 19:29	upstream	27bba9c5	68068804	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/20 09:05	upstream	3494d588	0767f13f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/19 07:09	upstream	c2e7554e	0767f13f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/18 19:37	upstream	0fa8ee0d	09323409	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/15 05:45	upstream	e28c0d7c	1bf9a662	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/14 17:25	upstream	f01c30de	1bf9a662	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/16 21:53	upstream	2cc3c4b3	424dd8e7	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/16 18:02	upstream	4b6c093e	424dd8e7	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
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	2020/01/23 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
ci-upstream-gce-leak	2020/11/24 01:42	upstream	418baf2c	878fb17a	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/11/23 05:30	upstream	a349e4c6	0d27f508	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org