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: 271d, last: 28d

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:

executing program
BUG: memory leak
unreferenced object 0xffff8881152010c0 (size 64):
  comm "syz-executor250", pid 6705, jiffies 4294942294 (age 13.500s)
  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 02  ................
  backtrace:
    [<000000007f40cbc1>] kmalloc include/linux/slab.h:559 [inline]
    [<000000007f40cbc1>] garp_attr_create net/802/garp.c:187 [inline]
    [<000000007f40cbc1>] garp_request_join+0x119/0x200 net/802/garp.c:350
    [<000000001a6f7d44>] vlan_gvrp_request_join+0x85/0x90 net/8021q/vlan_gvrp.c:34
    [<000000003c5a150b>] vlan_dev_open+0x14e/0x260 net/8021q/vlan_dev.c:289
    [<00000000003ee8cf>] __dev_open+0x12e/0x1f0 net/core/dev.c:1521
    [<00000000b0abca49>] __dev_change_flags+0x25a/0x2e0 net/core/dev.c:8285
    [<0000000072c53d17>] rtnl_configure_link+0x51/0x100 net/core/rtnetlink.c:3123
    [<0000000050bb8098>] __rtnl_newlink+0x90d/0xbc0 net/core/rtnetlink.c:3460
    [<000000006c8eb580>] rtnl_newlink+0x49/0x70 net/core/rtnetlink.c:3500
    [<000000009aba69c8>] rtnetlink_rcv_msg+0x17e/0x460 net/core/rtnetlink.c:5563
    [<0000000006fb882b>] netlink_rcv_skb+0x5b/0x180 net/netlink/af_netlink.c:2470
    [<00000000b7f10317>] netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
    [<00000000b7f10317>] netlink_unicast+0x2b6/0x3c0 net/netlink/af_netlink.c:1330
    [<00000000013de203>] netlink_sendmsg+0x2ba/0x570 net/netlink/af_netlink.c:1919
    [<00000000cb168b3f>] sock_sendmsg_nosec net/socket.c:651 [inline]
    [<00000000cb168b3f>] sock_sendmsg+0x4c/0x60 net/socket.c:671
    [<000000007b9519c3>] ____sys_sendmsg+0x2c4/0x2f0 net/socket.c:2353
    [<0000000093b02e12>] ___sys_sendmsg+0x81/0xc0 net/socket.c:2407
    [<00000000a3917931>] __sys_sendmsg+0x77/0xe0 net/socket.c:2440

BUG: memory leak
unreferenced object 0xffff888115201080 (size 64):
  comm "syz-executor250", pid 6705, jiffies 4294942294 (age 13.500s)
  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 02  ................
  backtrace:
    [<000000005c3e5af1>] kmalloc include/linux/slab.h:559 [inline]
    [<000000005c3e5af1>] mrp_attr_create net/802/mrp.c:276 [inline]
    [<000000005c3e5af1>] mrp_request_join+0x123/0x230 net/802/mrp.c:530
    [<00000000d6be3b21>] vlan_mvrp_request_join+0x85/0x90 net/8021q/vlan_mvrp.c:40
    [<00000000c6150450>] vlan_dev_open+0x13f/0x260 net/8021q/vlan_dev.c:292
    [<00000000003ee8cf>] __dev_open+0x12e/0x1f0 net/core/dev.c:1521
    [<00000000b0abca49>] __dev_change_flags+0x25a/0x2e0 net/core/dev.c:8285
    [<0000000072c53d17>] rtnl_configure_link+0x51/0x100 net/core/rtnetlink.c:3123
    [<0000000050bb8098>] __rtnl_newlink+0x90d/0xbc0 net/core/rtnetlink.c:3460
    [<000000006c8eb580>] rtnl_newlink+0x49/0x70 net/core/rtnetlink.c:3500
    [<000000009aba69c8>] rtnetlink_rcv_msg+0x17e/0x460 net/core/rtnetlink.c:5563
    [<0000000006fb882b>] netlink_rcv_skb+0x5b/0x180 net/netlink/af_netlink.c:2470
    [<00000000b7f10317>] netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
    [<00000000b7f10317>] netlink_unicast+0x2b6/0x3c0 net/netlink/af_netlink.c:1330
    [<00000000013de203>] netlink_sendmsg+0x2ba/0x570 net/netlink/af_netlink.c:1919
    [<00000000cb168b3f>] sock_sendmsg_nosec net/socket.c:651 [inline]
    [<00000000cb168b3f>] sock_sendmsg+0x4c/0x60 net/socket.c:671
    [<000000007b9519c3>] ____sys_sendmsg+0x2c4/0x2f0 net/socket.c:2353
    [<0000000093b02e12>] ___sys_sendmsg+0x81/0xc0 net/socket.c:2407
    [<00000000a3917931>] __sys_sendmsg+0x77/0xe0 net/socket.c:2440

Crashes (290):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2020/09/22 07:21	upstream	98477740	9e1fa68e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/21 17:39	upstream	ba4f184e	9e1fa68e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/21 03:43	upstream	bdcf11de	9564d2e9	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/12 16:21	upstream	729e3d09	ce441f06	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/11 14:19	upstream	581cb3a2	adfb8b4e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/11 13:14	upstream	581cb3a2	adfb8b4e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/10 06:48	upstream	34d4ddd3	409809d8	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/07 09:16	upstream	f4d51dff	abf9ba4f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/07 08:30	upstream	f4d51dff	abf9ba4f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/06 15:13	upstream	dd9fb9bb	abf9ba4f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/05 12:33	upstream	c70672d8	abf9ba4f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/03 10:11	upstream	fc3abb53	abf9ba4f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/03 09:23	upstream	fc3abb53	abf9ba4f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/03 06:23	upstream	fc3abb53	abf9ba4f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/02 15:18	upstream	9c7d619b	abf9ba4f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/31 22:19	upstream	f75aef39	d5a3ae1f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/31 07:29	upstream	dcc5c6f0	d5a3ae1f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/31 00:23	upstream	1127b219	d5a3ae1f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/30 11:52	upstream	1127b219	d5a3ae1f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/29 18:18	upstream	4d41ead6	d5a3ae1f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/29 01:42	upstream	96d454cd	d5a3ae1f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/28 21:45	upstream	15bc20c6	d5a3ae1f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/28 18:52	upstream	15bc20c6	d5a3ae1f	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/27 09:17	upstream	15bc20c6	816e0689	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/26 18:03	upstream	2ac69819	318430cb	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/26 15:12	upstream	2ac69819	318430cb	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/26 14:02	upstream	2ac69819	318430cb	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/23 08:19	upstream	c3d8f220	1da71ab0	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/22 10:06	upstream	f873db9a	6436ce4b	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/22 07:09	upstream	cd02217a	6436ce4b	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/21 04:14	upstream	da2968ff	1d75fe45	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/19 17:45	upstream	18445bf4	94b45706	.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	2020/09/20 20:25	upstream	bdcf11de	9564d2e9	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/11 18:28	upstream	581cb3a2	adfb8b4e	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/10 22:15	upstream	7fe10096	409809d8	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/10 01:08	upstream	34d4ddd3	409809d8	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/09 15:35	upstream	34d4ddd3	0ea7a887	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/06 21:07	upstream	dd9fb9bb	abf9ba4f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/06 08:21	upstream	9322c47b	abf9ba4f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/05 00:05	upstream	59126901	abf9ba4f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/04 10:30	upstream	e28f0104	abf9ba4f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/04 10:22	upstream	e28f0104	abf9ba4f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/04 02:24	upstream	e28f0104	abf9ba4f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/09/02 13:29	upstream	b765a32a	abf9ba4f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/31 14:21	upstream	dcc5c6f0	d5a3ae1f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/29 22:37	upstream	4d41ead6	d5a3ae1f	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/27 23:12	upstream	15bc20c6	816e0689	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/26 08:35	upstream	abb3438d	344da168	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/22 16:59	upstream	f873db9a	6436ce4b	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-gce-leak	2020/08/20 19:38	upstream	7eac66d0	ed282a3a	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org