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: 455d, last: 4d22h

Patch testing requests:
Created	Duration	User	Repo	Result
2021/03/25 21:13	8m	igormtorrente@gmail.com	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ master	report log
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 0xffff888113d1d840 (size 64):
  comm "syz-executor746", pid 8588, jiffies 4294943065 (age 12.610s)
  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 0f 00  ................
  backtrace:
    [<ffffffff8371aa98>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff8371aa98>] garp_attr_create net/802/garp.c:187 [inline]
    [<ffffffff8371aa98>] garp_request_join+0x138/0x220 net/802/garp.c:350
    [<ffffffff83d41f46>] vlan_gvrp_request_join+0x96/0xa0 net/8021q/vlan_gvrp.c:34
    [<ffffffff83d40799>] vlan_dev_open+0x1f9/0x330 net/8021q/vlan_dev.c:289
    [<ffffffff83682cc5>] __dev_open+0x175/0x260 net/core/dev.c:1563
    [<ffffffff836833ea>] __dev_change_flags+0x2fa/0x390 net/core/dev.c:8688
    [<ffffffff836934a4>] rtnl_configure_link+0x64/0x130 net/core/rtnetlink.c:3125
    [<ffffffff8369af04>] __rtnl_newlink+0xa74/0xdb0 net/core/rtnetlink.c:3451
    [<ffffffff8369b289>] rtnl_newlink+0x49/0x70 net/core/rtnetlink.c:3491
    [<ffffffff8369648c>] rtnetlink_rcv_msg+0x1fc/0x520 net/core/rtnetlink.c:5553
    [<ffffffff837cbb27>] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2502
    [<ffffffff837cad12>] netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
    [<ffffffff837cad12>] netlink_unicast+0x392/0x4c0 net/netlink/af_netlink.c:1338
    [<ffffffff837cb1a8>] netlink_sendmsg+0x368/0x6a0 net/netlink/af_netlink.c:1927
    [<ffffffff8363cc56>] sock_sendmsg_nosec net/socket.c:654 [inline]
    [<ffffffff8363cc56>] sock_sendmsg+0x56/0x80 net/socket.c:674
    [<ffffffff8363d1bc>] ____sys_sendmsg+0x36c/0x390 net/socket.c:2350
    [<ffffffff8364120b>] ___sys_sendmsg+0x8b/0xd0 net/socket.c:2404
    [<ffffffff83641308>] __sys_sendmsg+0x88/0x100 net/socket.c:2433

Crashes (384):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Title
ci-upstream-gce-leak	2021/04/18 12:35	upstream	c98ff1d0	7e2b734b	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/04/12 16:00	upstream	d434405a	bfeda1b1	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/18 03:06	upstream	f40ddce8	14052202	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/17 22:59	upstream	f40ddce8	14052202	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/17 18:20	upstream	f40ddce8	052f8d9f	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/15 16:55	upstream	f40ddce8	98682e5e	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/14 21:00	upstream	358fecee	98682e5e	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/14 18:51	upstream	358fecee	98682e5e	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/12 08:17	upstream	291009f6	a5f86b15	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/10 08:00	upstream	e0756cfc	2bd9619f	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/09 12:32	upstream	e0756cfc	2bd9619f	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/08 16:39	upstream	92bf2261	2ce644fc	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/05 19:01	upstream	dd86e7fa	23a562df	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/05 17:30	upstream	dd86e7fa	23a562df	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/04 14:41	upstream	61556703	42b90a7c	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/02 02:39	upstream	1048ba83	e6b95f32	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/02/01 11:12	upstream	1048ba83	fc9fd31e	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/30 05:45	upstream	bec4c296	fc9fd31e	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/30 04:57	upstream	bec4c296	fc9fd31e	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/29 18:52	upstream	bec4c296	6593fd32	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/28 10:47	upstream	76c057c8	eefc07f2	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/27 13:27	upstream	2ab38c17	a0ebf917	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/25 16:33	upstream	6ee1d745	52e37319	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/24 12:13	upstream	e1ae4b0b	52e37319	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/24 01:38	upstream	e1ae4b0b	52e37319	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/23 00:39	upstream	83d09ad4	4080af96	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/22 14:02	upstream	9f29bd8b	d4f4eca5	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/22 01:56	upstream	9791581c	d4f4eca5	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/19 18:50	upstream	1e2a199f	63631df1	.config	log	report	syz	C	memory leak in garp_request_join
ci-upstream-gce-leak	2021/01/15 09:01	upstream	14662050	65a7a854	.config	log	report	syz	C
ci-upstream-gce-leak	2021/01/13 06:59	upstream	e609571b	0cdd6185	.config	log	report	syz	C
ci-upstream-gce-leak	2021/01/12 14:07	upstream	a0d54b4f	2c1f2513	.config	log	report	syz	C
ci-upstream-gce-leak	2021/01/11 17:31	upstream	7c53f6b6	2c1f2513	.config	log	report	syz	C
ci-upstream-gce-leak	2021/01/11 02:22	upstream	0653161f	2c1f2513	.config	log	report	syz	C
ci-upstream-gce-leak	2021/01/10 12:30	upstream	2ff90100	2c1f2513	.config	log	report	syz	C
ci-upstream-gce-leak	2021/01/03 18:25	upstream	3516bd72	79264ae3	.config	log	report	syz	C
ci-upstream-gce-leak	2021/01/03 17:22	upstream	3516bd72	79264ae3	.config	log	report	syz	C
ci-upstream-gce-leak	2021/01/02 04:53	upstream	eda809ae	79264ae3	.config	log	report	syz	C
ci-upstream-gce-leak	2020/12/27 05:12	upstream	f838f8d2	821e0b09	.config	log	report	syz	C
ci-upstream-gce-leak	2020/12/24 10:50	upstream	58cf05f5	c2c1d1dd	.config	log	report	syz	C
ci-upstream-gce-leak	2020/12/22 11:51	upstream	8653b778	04201c06	.config	log	report	syz	C
ci-upstream-gce-leak	2020/12/22 09:11	upstream	8653b778	04201c06	.config	log	report	syz	C
ci-upstream-gce-leak	2020/08/16 21:53	upstream	2cc3c4b3	424dd8e7	.config	log	report	syz	C
ci-upstream-gce-leak	2020/08/16 18:02	upstream	4b6c093e	424dd8e7	.config	log	report	syz	C
ci-upstream-gce-leak	2020/01/27 19:02	upstream	d5226fa6	dd56146d	.config	log	report	syz	C
ci-upstream-gce-leak	2020/01/23 19:24	upstream	131701c6	3334d684	.config	log	report	syz	C
ci-upstream-gce-leak	2021/04/10 21:45	upstream	d4961772	bfeda1b1	.config	log	report	syz		memory leak in garp_request_join
ci-upstream-gce-leak	2021/04/06 00:53	upstream	0a50438c	6a81331a	.config	log	report	syz		memory leak in garp_request_join
ci-upstream-gce-leak	2021/03/31 06:04	upstream	2bb25b3a	6a81331a	.config	log	report	syz		memory leak in garp_request_join
ci-upstream-gce-leak	2021/03/18 08:22	upstream	6417f031	fdb2bb2c	.config	log	report	syz		memory leak in garp_request_join
ci-upstream-gce-leak	2021/03/15 20:29	upstream	1e28eed1	fdb2bb2c	.config	log	report	syz		memory leak in garp_request_join