WARNING in nsim_fib6_rt_nh

WARNING in nsim_fib6_rt_nh_del
Status: upstream: reported on 2020/01/30 09:54
Reported-by: syzbot+63abe9d5f32ff88090eb@syzkaller.appspotmail.com
First crash: 402d, last: 15d

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 1381 at drivers/net/netdevsim/fib.c:466 nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:466
Modules linked in:
CPU: 0 PID: 1381 Comm: syz-executor.0 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:466
Code: e8 ae c0 4b fc 85 db 74 32 e8 25 b9 4b fc 48 89 ef e8 0d 09 8e fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 0e b9 4b fc e8 09 b9 4b fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 f8 b8 4b fc e8 f3 b8 4b fc
RSP: 0018:ffffc90001c1e428 EFLAGS: 00010246
RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc90001f21000
RDX: 0000000000040000 RSI: ffffffff85271ce7 RDI: ffff888026680280
RBP: ffff8880266802b8 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff85278160 R11: 0000000000000000 R12: ffff888020fb7d10
R13: ffff8880151f5600 R14: ffff8880266802b8 R15: ffff888026680280
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0063) knlGS:00000000f55e1b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000055aae8da4160 CR3: 000000002da3a000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 nsim_fib6_rt_remove drivers/net/netdevsim/fib.c:706 [inline]
 nsim_fib6_event drivers/net/netdevsim/fib.c:738 [inline]
 nsim_fib_event drivers/net/netdevsim/fib.c:757 [inline]
 nsim_fib_event_nb+0x10e3/0x2840 drivers/net/netdevsim/fib.c:785
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 atomic_notifier_call_chain+0x8d/0x170 kernel/notifier.c:217
 call_fib_notifiers+0x166/0x290 net/core/fib_notifier.c:35
 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:400 [inline]
 fib6_del_route net/ipv6/ip6_fib.c:1985 [inline]
 fib6_del+0xefc/0x15a0 net/ipv6/ip6_fib.c:2026
 fib6_clean_node+0x398/0x5c0 net/ipv6/ip6_fib.c:2188
 fib6_walk_continue+0x4aa/0x8e0 net/ipv6/ip6_fib.c:2110
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2158
 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2238
 __fib6_clean_all+0x120/0x290 net/ipv6/ip6_fib.c:2254
 rt6_sync_down_dev net/ipv6/route.c:4780 [inline]
 rt6_disable_ip+0x77f/0x890 net/ipv6/route.c:4785
 addrconf_ifdown.isra.0+0xf6/0x1590 net/ipv6/addrconf.c:3704
 addrconf_notify+0x55c/0x23f0 net/ipv6/addrconf.c:3629
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2040
 call_netdevice_notifiers_extack net/core/dev.c:2052 [inline]
 call_netdevice_notifiers net/core/dev.c:2066 [inline]
 __dev_notify_flags+0x1da/0x2b0 net/core/dev.c:8519
 dev_change_flags+0x100/0x160 net/core/dev.c:8555
 do_setlink+0x891/0x3a70 net/core/rtnetlink.c:2708
 rtnl_group_changelink net/core/rtnetlink.c:3227 [inline]
 __rtnl_newlink+0xde5/0x16e0 net/core/rtnetlink.c:3381
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3491
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5553
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2345
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2399
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2432
 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline]
 __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7fe7549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f55e15fc EFLAGS: 00000296 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000140
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Crashes (77):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-386	2021/02/20 21:33	upstream	f40ddce8	3e5ed8b4	.config	log	report	info	WARNING in nsim_fib6_rt_nh_del
ci-upstream-net-kasan-gce	2021/01/20 02:10	net-next	7eab14de	63631df1	.config	log	report	info	WARNING in nsim_fib6_rt_nh_del
ci-upstream-kasan-gce-root	2020/11/30 10:25	upstream	b6505459	a0092f9d	.config	log	report	info
ci-upstream-kasan-gce	2020/10/01 14:32	upstream	60e72093	a9767fb2	.config	log	report	info
ci-upstream-kasan-gce-root	2020/08/29 18:23	upstream	4d41ead6	d5a3ae1f	.config	log	report
ci-upstream-kasan-gce	2020/08/27 09:57	upstream	15bc20c6	816e0689	.config	log	report
ci-upstream-kasan-gce	2020/08/25 06:19	upstream	6a9dc5fd	344da168	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/08/24 10:12	upstream	cb957121	cef5ae68	.config	log	report
ci-upstream-kasan-gce	2020/08/23 09:47	upstream	c3d8f220	1da71ab0	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/22 19:36	upstream	f873db9a	6436ce4b	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/21 12:37	upstream	da2968ff	6436ce4b	.config	log	report
ci-upstream-kasan-gce-root	2020/08/15 23:44	upstream	c9c9735c	424dd8e7	.config	log	report
ci-upstream-kasan-gce	2020/08/15 14:18	upstream	7fca4dee	424dd8e7	.config	log	report
ci-upstream-kasan-gce-root	2020/08/09 00:06	upstream	449dc8c9	f721e4a0	.config	log	report
ci-upstream-kasan-gce-root	2020/08/08 20:53	upstream	449dc8c9	f721e4a0	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/08/06 13:57	upstream	47ec5303	1f122f88	.config	log	report
ci-upstream-kasan-gce-root	2020/08/04 22:45	upstream	c0842fbc	80a06902	.config	log	report
ci-upstream-kasan-gce-root	2020/07/25 04:27	upstream	f37e99ac	554af388	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/07/19 13:37	upstream	f932d58a	9c812472	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/07/12 15:43	upstream	0aea6d5c	115e1930	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/07/07 15:42	upstream	7cc2a8ea	51095195	.config	log	report
ci-upstream-kasan-gce	2020/06/27 03:03	upstream	4a21185c	aea82c00	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/06/26 13:18	upstream	4a21185c	aea82c00	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/06/19 09:40	upstream	7ae77150	bc258b50	.config	log	report
ci-upstream-kasan-gce-root	2020/06/10 14:21	upstream	7ae77150	860c4de9	.config	log	report
ci-upstream-kasan-gce	2020/06/10 03:16	upstream	7ae77150	860c4de9	.config	log	report
ci-upstream-kasan-gce	2020/06/04 20:57	upstream	acf25aa6	6720fdef	.config	log	report
ci-upstream-kasan-gce	2020/05/28 20:38	upstream	b0c3ba31	0d951763	.config	log	report
ci-upstream-kasan-gce	2020/05/04 22:06	upstream	9851a0de	9941337c	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/04/25 17:40	upstream	5ef58e29	b8bb8e5f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/03/31 10:01	upstream	673b41e0	c8d1cc20	.config	log	report
ci-upstream-kasan-gce-root	2020/03/13 07:01	upstream	3cc6e2c5	d850e9d0	.config	log	report
ci-upstream-kasan-gce	2020/03/10 09:50	upstream	30bb5572	35f53e45	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/03/08 03:37	upstream	61a09258	2e9971bb	.config	log	report
ci-upstream-kasan-gce-root	2020/03/04 02:51	upstream	63623fd4	c88c7b75	.config	log	report
ci-upstream-kasan-gce	2020/03/03 15:17	upstream	63623fd4	c88c7b75	.config	log	report
ci-upstream-kasan-gce	2020/03/02 16:28	upstream	63623fd4	c88c7b75	.config	log	report
ci-upstream-kasan-gce	2020/02/29 01:12	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce	2020/02/29 00:20	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce	2020/02/28 13:10	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce	2020/02/28 08:55	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce	2020/02/26 06:38	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce	2020/02/25 07:37	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce	2020/02/25 07:15	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce-root	2020/02/25 07:13	upstream	f8788d86	59b57593	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/02/20 18:19	upstream	ca7e1fd1	81230308	.config	log	report
ci-upstream-kasan-gce	2020/02/18 15:38	upstream	b1da3acc	012fbc32	.config	log	report
ci-upstream-kasan-gce-root	2020/02/17 13:33	upstream	11a48a5a	2b411596	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/02/16 23:27	upstream	11a48a5a	1f448cd6	.config	log	report
ci-upstream-kasan-gce	2020/02/14 23:43	upstream	2019fc96	5d7b90f1	.config	log	report
ci-upstream-kasan-gce	2020/02/13 21:45	upstream	0bf999f9	c5ed587f	.config	log	report
ci-upstream-kasan-gce-root	2020/02/10 17:09	upstream	bb6d3fb3	18847f55	.config	log	report
ci-upstream-kasan-gce	2020/02/10 14:35	upstream	bb6d3fb3	18847f55	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/02/09 10:35	upstream	fdfa3a67	6ece2ea5	.config	log	report
ci-upstream-kasan-gce	2020/02/05 13:03	upstream	6992ca0d	93e5e335	.config	log	report
ci-upstream-kasan-gce	2020/02/02 11:39	upstream	94f2630b	2274ad39	.config	log	report
ci-upstream-kasan-gce	2020/02/01 21:44	upstream	94f2630b	2274ad39	.config	log	report
ci-upstream-kasan-gce	2020/01/31 12:57	upstream	ccaaaf6f	5ed23f9a	.config	log	report
ci-upstream-kasan-gce	2020/01/30 23:51	upstream	9f68e365	5ed23f9a	.config	log	report
ci-upstream-kasan-gce-386	2021/01/13 04:55	upstream	e609571b	0cdd6185	.config	log	report	info
ci-upstream-kasan-gce-386	2020/06/20 05:59	upstream	7ae77150	81abc331	.config	log	report
ci-upstream-kasan-gce-386	2020/06/09 10:46	upstream	7ae77150	0d60b78a	.config	log	report
ci-upstream-kasan-gce-386	2020/05/09 15:52	upstream	d5eeab8d	88cb3e92	.config	log	report
ci-upstream-kasan-gce-386	2020/05/01 01:14	upstream	1d2cc5ac	3698959a	.config	log	report
ci-upstream-kasan-gce-386	2020/03/12 11:37	upstream	e6e6ec48	d850e9d0	.config	log	report
ci-upstream-kasan-gce-386	2020/02/12 16:15	upstream	359c92c0	84f4fc8a	.config	log	report
ci-upstream-kasan-gce-386	2020/02/10 02:32	upstream	d1ea35f4	35f5e45e	.config	log	report
ci-upstream-bpf-next-kasan-gce	2020/05/22 21:47	bpf-next	29ae90d2	9682898d	.config	log	report
ci-upstream-bpf-next-kasan-gce	2020/01/31 14:39	bpf-next	b3a60822	5ed23f9a	.config	log	report
ci-upstream-net-kasan-gce	2020/01/30 00:57	net-next	b3a60822	5ed23f9a	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/08/20 02:36	linux-next	8eb858df	94b45706	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/05/22 14:38	linux-next	ac935d22	5afa2ddd	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/05/06 12:02	linux-next	ac935d22	35b8eb30	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/02/07 02:52	linux-next	6dff1565	06150bf1	.config	log	report