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: 479d, last: 10d

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

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..

Fix bisection attempts:
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce-smack-root	2021/01/17 02:45	upstream	0da0a8a0a0e1	19a8de55	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2020/11/11 04:10	upstream	eccc87672492	19a8de55	.config	log	report	syz

Crashes (331):
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	2021/09/09 17:28	upstream	a3fa7a101dcf	e2776ee4	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/07 22:34	upstream	a2b28235335f	064c9eb7	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/07 00:46	upstream	0319b848b155	6ca60148	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/06 15:24	upstream	0319b848b155	6ca60148	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/05 23:13	upstream	0319b848b155	d236a457	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/05 08:33	upstream	49624efa65ac	d236a457	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/05 06:16	upstream	49624efa65ac	d236a457	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/03 10:07	upstream	a9c9a6f741cd	f62a5829	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/03 07:16	upstream	a9c9a6f741cd	15cea0a3	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/02 12:36	upstream	4ac6d90867a4	15cea0a3	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/01 22:11	upstream	835d31d319d9	7eb7e152	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/09/01 20:03	upstream	835d31d319d9	7eb7e152	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/31 13:05	upstream	b91db6a0b52e	8f58a0ef	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/30 17:15	upstream	7d2a07b76933	8f58a0ef	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/30 04:40	upstream	90ac80dcd313	be2c130d	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/30 03:20	upstream	90ac80dcd313	be2c130d	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/28 21:16	upstream	3f5ad13cb012	be2c130d	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/28 14:50	upstream	77dd11439b86	be2c130d	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/28 12:48	upstream	77dd11439b86	be2c130d	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/27 21:17	upstream	77dd11439b86	d5a29e53	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/26 19:37	upstream	73f3af7b4611	b318694d	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/26 18:06	upstream	73f3af7b4611	b318694d	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/26 13:21	upstream	73f3af7b4611	b599f2fc	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/26 11:36	upstream	73f3af7b4611	b599f2fc	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/24 20:02	upstream	6e764bcd1cf7	b599f2fc	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/23 10:01	upstream	e22ce8eb631b	b599f2fc	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/23 07:36	upstream	e22ce8eb631b	b599f2fc	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/20 01:34	upstream	f87d64319e6f	b599f2fc	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/19 06:39	upstream	d6d09a694205	a2fe1cb5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/18 12:06	upstream	614cb2751d31	a2fe1cb5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/17 16:50	upstream	794c7931a242	a2fe1cb5	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/16 14:14	upstream	7c60610d4767	33c26cb7	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/13 14:10	upstream	f8e6dfc64f61	3fd2ea69	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/13 13:03	upstream	f8e6dfc64f61	3fd2ea69	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/12 22:25	upstream	f8fbb47c6e86	3fd2ea69	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/12 06:33	upstream	761c6d7ec820	6972b106	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/11 18:42	upstream	761c6d7ec820	6972b106	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/11 01:45	upstream	9e723c5380c6	6972b106	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/10 11:47	upstream	9a73fa375d58	6972b106	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/09 16:50	upstream	36a21d51725a	6972b106	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/08 22:42	upstream	66745863ecde	6972b106	.config	log	report		info	WARNING in ipvlan_l3s_unregister
ci-upstream-kasan-gce-smack-root	2021/08/08 14:41	upstream	85a90500f9a1	6972b106	.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