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: 61d, last: 17d

Sample crash report:

bridge0: port 2(bridge_slave_1) entered disabled state
bridge0: port 1(bridge_slave_0) entered disabled state
------------[ cut here ]------------
WARNING: CPU: 0 PID: 20299 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: 0 PID: 20299 Comm: syz-executor.4 Not tainted 5.6.0-rc5-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+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:nsim_fib6_rt_nh_del+0x267/0x330 drivers/net/netdevsim/fib.c:448
Code: e8 0e bf 8b fc 85 db 74 32 e8 95 bd 8b fc 48 89 ef e8 ad 2e c8 fc 5b 5d 41 5c 41 5d 41 5e 41 5f e9 7e bd 8b fc e8 79 bd 8b fc <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f e9 68 bd 8b fc e8 63 bd 8b fc
RSP: 0018:ffffc90004af6488 EFLAGS: 00010246
RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc90012f24000
RDX: 0000000000040000 RSI: ffffffff84e65817 RDI: ffff88809600bd00
RBP: ffff88809600bd38 R08: ffff88803bb94440 R09: fffffbfff14cba41
R10: ffffc90004af64c0 R11: ffffffff8a65d207 R12: ffff888094b2f190
R13: ffff8880a2c0ec00 R14: ffff88809600bd38 R15: ffff88809600bd00
 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+0x14bb/0x24e0 drivers/net/netdevsim/fib.c:772
 notifier_call_chain+0xc0/0x230 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+0xfb/0x150 net/ipv6/ip6_fib.c:399
 fib6_del_route net/ipv6/ip6_fib.c:1981 [inline]
 fib6_del+0xe6c/0x14d0 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+0x91/0xf0 net/ipv6/ip6_fib.c:2149
 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2229
 __fib6_clean_all+0x118/0x2a0 net/ipv6/ip6_fib.c:2245
 rt6_sync_down_dev+0x12a/0x150 net/ipv6/route.c:4755
 rt6_disable_ip+0x24/0x460 net/ipv6/route.c:4760
 addrconf_ifdown+0x9d/0x12f0 net/ipv6/addrconf.c:3708
 addrconf_notify+0x5a6/0x2270 net/ipv6/addrconf.c:3633
 notifier_call_chain+0xc0/0x230 kernel/notifier.c:83
 call_netdevice_notifiers_info net/core/dev.c:1948 [inline]
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1933
 call_netdevice_notifiers_extack net/core/dev.c:1960 [inline]
 call_netdevice_notifiers net/core/dev.c:1974 [inline]
 __dev_notify_flags+0x1e9/0x2c0 net/core/dev.c:8183
 dev_change_flags+0x100/0x160 net/core/dev.c:8219
 do_setlink+0xa1c/0x35e0 net/core/rtnetlink.c:2596
 rtnl_group_changelink net/core/rtnetlink.c:3103 [inline]
 __rtnl_newlink+0xc96/0x1590 net/core/rtnetlink.c:3257
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3377
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5436
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2478
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6b9/0x7d0 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2430
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c679
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fcb869dec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fcb869df6d4 RCX: 000000000045c679
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009f9 R14: 00000000004cc937 R15: 000000000076bf0c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (34):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Maintainers
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	2020/03/12 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	2020/01/31 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	2020/02/07 02:52	linux-next	6dff1565	06150bf1	.config	log	report	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org