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: 163d, last: 3d12h

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 11390 at drivers/net/netdevsim/fib.c:448 nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:448
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 11390 Comm: syz-executor.5 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
RIP: 0010:nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:448
Code: e8 9e a8 6f fc 85 db 74 32 e8 15 ac 6f fc 48 89 ef e8 ed b2 ae fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 fe ab 6f fc e8 f9 ab 6f fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 e8 ab 6f fc e8 e3 ab 6f fc
RSP: 0018:ffffc90004c16468 EFLAGS: 00010246
RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9001410e000
RDX: 0000000000040000 RSI: ffffffff85040b67 RDI: ffff88808f06d180
RBP: ffff88808f06d1b8 R08: 0000000000000001 R09: ffff8880a8d9ce08
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a7506b50
R13: ffff88809014e000 R14: ffff88808f06d1b8 R15: ffff88808f06d180
 nsim_fib6_rt_remove drivers/net/netdevsim/fib.c:688 [inline]
 nsim_fib6_event drivers/net/netdevsim/fib.c:725 [inline]
 nsim_fib_event drivers/net/netdevsim/fib.c:744 [inline]
 nsim_fib_event_nb+0x1230/0x2880 drivers/net/netdevsim/fib.c:772
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 __atomic_notifier_call_chain+0x95/0x180 kernel/notifier.c:173
 call_fib_notifiers+0x166/0x290 net/core/fib_notifier.c:35
 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:399 [inline]
 fib6_del_route net/ipv6/ip6_fib.c:1981 [inline]
 fib6_del+0xf7d/0x1630 net/ipv6/ip6_fib.c:2017
 fib6_clean_node+0x39b/0x570 net/ipv6/ip6_fib.c:2179
 fib6_walk_continue+0x4aa/0x8e0 net/ipv6/ip6_fib.c:2101
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2149
 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2229
 __fib6_clean_all+0x120/0x290 net/ipv6/ip6_fib.c:2245
 rt6_sync_down_dev net/ipv6/route.c:4775 [inline]
 rt6_disable_ip+0x775/0x870 net/ipv6/route.c:4780
 addrconf_ifdown.isra.0+0xf6/0x1570 net/ipv6/addrconf.c:3677
 addrconf_notify+0x55c/0x2310 net/ipv6/addrconf.c:3602
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2027
 call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
 call_netdevice_notifiers net/core/dev.c:2053 [inline]
 __dev_notify_flags+0x1da/0x2b0 net/core/dev.c:8318
 dev_change_flags+0x100/0x160 net/core/dev.c:8354
 do_setlink+0x87d/0x35c0 net/core/rtnetlink.c:2604
 rtnl_group_changelink net/core/rtnetlink.c:3123 [inline]
 __rtnl_newlink+0xdea/0x1730 net/core/rtnetlink.c:3277
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3397
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5460
 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2352
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2406
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb29
Code: Bad RIP value.
RSP: 002b:00007faf9dd4dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000502760 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a43 R14: 00000000004cd2a1 R15: 00007faf9dd4e6d4
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (52):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Maintainers
ci-upstream-kasan-gce-selinux-root	2020/07/07 15:42	upstream	7cc2a8ea	51095195	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/06/27 03:03	upstream	4a21185c	aea82c00	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2020/06/26 13:18	upstream	4a21185c	aea82c00	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2020/06/19 09:40	upstream	7ae77150	bc258b50	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-root	2020/06/10 14:21	upstream	7ae77150	860c4de9	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/06/10 03:16	upstream	7ae77150	860c4de9	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/06/04 20:57	upstream	acf25aa6	6720fdef	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/05/28 20:38	upstream	b0c3ba31	0d951763	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/05/04 22:06	upstream	9851a0de	9941337c	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-smack-root	2020/04/25 17:40	upstream	5ef58e29	b8bb8e5f	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/31 10:01	upstream	673b41e0	c8d1cc20	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-root	2020/03/13 07:01	upstream	3cc6e2c5	d850e9d0	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/03/10 09:50	upstream	30bb5572	35f53e45	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-smack-root	2020/03/08 03:37	upstream	61a09258	2e9971bb	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-root	2020/03/04 02:51	upstream	63623fd4	c88c7b75	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/03/03 15:17	upstream	63623fd4	c88c7b75	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/03/02 16:28	upstream	63623fd4	c88c7b75	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/29 01:12	upstream	f8788d86	59b57593	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/29 00:20	upstream	f8788d86	59b57593	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/28 13:10	upstream	f8788d86	59b57593	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/28 08:55	upstream	f8788d86	59b57593	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/26 06:38	upstream	f8788d86	59b57593	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/25 07:37	upstream	f8788d86	59b57593	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/25 07:15	upstream	f8788d86	59b57593	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-root	2020/02/25 07:13	upstream	f8788d86	59b57593	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-smack-root	2020/02/20 18:19	upstream	ca7e1fd1	81230308	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/18 15:38	upstream	b1da3acc	012fbc32	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-root	2020/02/17 13:33	upstream	11a48a5a	2b411596	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2020/02/16 23:27	upstream	11a48a5a	1f448cd6	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/14 23:43	upstream	2019fc96	5d7b90f1	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/13 21:45	upstream	0bf999f9	c5ed587f	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-root	2020/02/10 17:09	upstream	bb6d3fb3	18847f55	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/10 14:35	upstream	bb6d3fb3	18847f55	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-smack-root	2020/02/09 10:35	upstream	fdfa3a67	6ece2ea5	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/05 13:03	upstream	6992ca0d	93e5e335	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/02 11:39	upstream	94f2630b	2274ad39	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/02/01 21:44	upstream	94f2630b	2274ad39	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/01/31 12:57	upstream	ccaaaf6f	5ed23f9a	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce	2020/01/30 23:51	upstream	9f68e365	5ed23f9a	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-386	2020/06/20 05:59	upstream	7ae77150	81abc331	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-386	2020/06/09 10:46	upstream	7ae77150	0d60b78a	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-386	2020/05/09 15:52	upstream	d5eeab8d	88cb3e92	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-386	2020/05/01 01:14	upstream	1d2cc5ac	3698959a	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-386	2020/03/12 11:37	upstream	e6e6ec48	d850e9d0	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-386	2020/02/12 16:15	upstream	359c92c0	84f4fc8a	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-386	2020/02/10 02:32	upstream	d1ea35f4	35f5e45e	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-bpf-next-kasan-gce	2020/05/22 21:47	bpf-next	29ae90d2	9682898d	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-bpf-next-kasan-gce	2020/01/31 14:39	bpf-next	b3a60822	5ed23f9a	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/01/30 00:57	net-next	b3a60822	5ed23f9a	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/05/22 14:38	linux-next	ac935d22	5afa2ddd	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/05/06 12:02	linux-next	ac935d22	35b8eb30	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root	2020/02/07 02:52	linux-next	6dff1565	06150bf1	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org