WARNING in ipvlan_l3s

WARNING in ipvlan_l3s_unregister
Status: upstream: reported syz repro on 2020/07/06 10:48
Reported-by: syzbot+bb3d7a24f705078b1286@syzkaller.appspotmail.com
First crash: 604d, last: 52d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: syz .config

Fix bisection: fixed by (bisect log) :
commit f123cffdd8fe8ea6c7fded4b88516a42798797d0
Author: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Date: Mon Nov 29 17:53:27 2021 +0000

net: netlink: af_netlink: Prevent empty skb by adding a check on len.

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 7217 at drivers/net/ipvlan/ipvlan_l3s.c:148 ipvlan_unregister_nf_hook drivers/net/ipvlan/ipvlan_l3s.c:148 [inline]
WARNING: CPU: 0 PID: 7217 at drivers/net/ipvlan/ipvlan_l3s.c:148 ipvlan_l3s_unregister+0x145/0x1d0 drivers/net/ipvlan/ipvlan_l3s.c:221
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7217 Comm: syz-executor.0 Not tainted 5.8.0-rc7-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+0x1f0/0x31e lib/dump_stack.c:118
 panic+0x264/0x7a0 kernel/panic.c:231
 __warn+0x227/0x250 kernel/panic.c:600
 report_bug+0x1b1/0x2e0 lib/bug.c:198
 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:540
RIP: 0010:ipvlan_unregister_nf_hook drivers/net/ipvlan/ipvlan_l3s.c:148 [inline]
RIP: 0010:ipvlan_l3s_unregister+0x145/0x1d0 drivers/net/ipvlan/ipvlan_l3s.c:221
Code: 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 32 57 dc fc 49 c7 06 00 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 ab 47 9d fc <0f> 0b eb c8 e8 a2 47 9d fc c6 05 ab e2 b1 04 01 48 c7 c7 ec f3 09
RSP: 0018:ffffc9000228f308 EFLAGS: 00010293
RAX: ffffffff84d74a95 RBX: 1ffff1101526eb18 RCX: ffff888095ba4400
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff84d74a1e R09: fffffbfff131a7ee
R10: fffffbfff131a7ee R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880a93758c0 R14: ffff8880a2232000 R15: ffff888090f28040
 ipvlan_set_port_mode+0x33e/0x420 drivers/net/ipvlan/ipvlan_main.c:37
 ipvlan_link_new+0x733/0xab0 drivers/net/ipvlan/ipvlan_main.c:611
 __rtnl_newlink net/core/rtnetlink.c:3339 [inline]
 rtnl_newlink+0x143d/0x1c10 net/core/rtnetlink.c:3398
 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5461
 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0xa57/0xd70 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 ____sys_sendmsg+0x519/0x800 net/socket.c:2352
 ___sys_sendmsg net/socket.c:2406 [inline]
 __sys_sendmsg+0x2b1/0x360 net/socket.c:2439
 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c369
Code: 8d 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8ba9a3fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002b740 RCX: 000000000045c369
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffc8b295b4f R14: 00007f8ba9a409c0 R15: 000000000078bf0c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (441):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	VM info	Title
ci-upstream-kasan-gce-smack-root	2020/07/29 20:09	upstream	6ba1b005ffc3	19a8de55	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2020/07/26 07:10	upstream	23ee3e4e5bd2	1f7cc1ca	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2021/12/01 22:04	upstream	58e1100fdc59	61f86278	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/30 22:05	upstream	f080815fdb3e	80270552	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/30 21:00	upstream	f080815fdb3e	80270552	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/30 12:43	upstream	d58071a8a76d	80270552	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/30 11:01	upstream	d58071a8a76d	80270552	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/30 05:21	upstream	d58071a8a76d	d0830353	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/29 15:57	upstream	d58071a8a76d	d0830353	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/29 00:06	upstream	d06c942efea4	63eeac02	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/28 12:06	upstream	3498e7f2bb41	63eeac02	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/27 21:58	upstream	741392771338	63eeac02	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/27 00:15	upstream	c5c17547b778	63eeac02	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/26 22:47	upstream	c5c17547b778	63eeac02	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/26 11:37	upstream	a4849f6000e2	63eeac02	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/26 07:00	upstream	b501b85957de	63eeac02	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/25 20:27	upstream	b501b85957de	63eeac02	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/25 01:01	upstream	5f53fa508db0	545ab074	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/24 23:31	upstream	5f53fa508db0	545ab074	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/24 00:10	upstream	5d9f4cf36721	545ab074	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/23 20:10	upstream	136057256686	545ab074	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/23 04:08	upstream	136057256686	545ab074	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/22 14:50	upstream	136057256686	545ab074	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/21 22:19	upstream	40c93d7fff6f	4eb20a4e	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/20 15:30	upstream	a90af8f15bdc	4eb20a4e	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/20 13:50	upstream	a90af8f15bdc	4eb20a4e	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/19 17:04	upstream	4c388a8e740d	3a9d0024	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/19 13:11	upstream	4c388a8e740d	31a30fc0	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/18 14:52	upstream	42eb8fdac2fc	31a30fc0	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/18 09:18	upstream	42eb8fdac2fc	cafff8b6	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/17 20:33	upstream	ee1703cda8dc	cafff8b6	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/17 01:24	upstream	8ab774587903	cafff8b6	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/16 23:08	upstream	8ab774587903	cafff8b6	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/16 19:48	upstream	8ab774587903	600426bd	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/15 03:28	upstream	fa55b7dcdc43	83f5c9b5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/14 15:41	upstream	c8c109546a19	83f5c9b5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/14 13:19	upstream	c8c109546a19	83f5c9b5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/14 01:40	upstream	ccfff0a2bd2a	83f5c9b5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/13 10:17	upstream	66f4beaa6c1d	83f5c9b5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/12 22:07	upstream	7246f4dcaccc	83f5c9b5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/12 18:02	upstream	5833291ab6de	83f5c9b5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/12 16:53	upstream	5833291ab6de	83f5c9b5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/12 01:49	upstream	5833291ab6de	75b04091	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/11/11 09:48	upstream	debe436e77c7	75b04091	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2020/12/16 04:56	upstream	d635a69dd498	f213e07e	.config	log	report		info
ci-upstream-kasan-gce-smack-root	2020/07/03 23:24	upstream	7cc2a8ea1048	51095195	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/05/29 04:26	upstream	75caf310d16c	d19ed305	.config	log	report