kernel BUG at net/core/skbuff.c:LINE!

kernel BUG at net/core/skbuff.c:LINE!
Status: upstream: reported C repro on 2019/04/12 15:43
Reported-by: syzbot+812d66c9f9b0bbb28d30@syzkaller.appspotmail.com
First crash: 421d, last: 47m

similar bugs (8):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
android-44	kernel BUG at net/core/skbuff.c:LINE!	C		79	196d	422d	0/2	public: reported C repro on 2019/04/11 08:44
linux-4.19	kernel BUG at net/core/skbuff.c:LINE!	C		253	6d09h	405d	0/1	upstream: reported C repro on 2019/04/27 20:12
upstream	kernel BUG at net/core/skbuff.c:LINE! (2)	C		562	861d	950d	4/17	fixed on 2018/01/29 03:39
android-54	kernel BUG at net/core/skbuff.c:LINE!	C		21	31d	146d	0/1	upstream: reported C repro on 2020/01/12 09:43
android-414	kernel BUG at net/core/skbuff.c:LINE!	C		2743	185d	422d	0/1	public: reported C repro on 2019/04/11 00:00
upstream	kernel BUG at net/core/skbuff.c:LINE! (3)	C	cause	3663	12h30m	855d	0/17	upstream: reported C repro on 2018/02/01 19:21
upstream	kernel BUG at net/core/skbuff.c:LINE!			5	956d	1026d	3/17	fixed on 2017/10/27 10:10
android-49	kernel BUG at net/core/skbuff.c:LINE!	C		391	185d	421d	0/3	public: reported C repro on 2019/04/12 00:00

Sample crash report:

IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
skbuff: skb_over_panic: text:ffffffff8577f2ff len:40 put:40 head:ffff88808d34b800 data:ffff88808d34b8b0 tail:0xd8 end:0xc0 dev:ip6gretap0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7310 Comm: syz-executor505 Not tainted 4.14.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888092a40140 task.stack: ffff8880887c8000
RIP: 0010:skb_panic+0x172/0x174 net/core/skbuff.c:104
RSP: 0018:ffff8880aeb07a10 EFLAGS: 00010286
RAX: 0000000000000089 RBX: ffff88809ea88540 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff86ac07e0 RDI: ffffed1015d60f38
RBP: ffffffff873830a0 R08: 0000000000000089 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8577f2ff
R13: 0000000000000028 R14: ffff88809e4b4d00 R15: 00000000000000c0
FS:  0000000001910880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 00000000881e3000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put.cold+0x24/0x24 net/core/skbuff.c:1699
 ip6_mc_hdr.isra.0.constprop.0+0x11f/0x580 net/ipv6/mcast.c:1552
 mld_newpack+0x3ab/0x7a0 net/ipv6/mcast.c:1603
 add_grhead.isra.0+0x299/0x370 net/ipv6/mcast.c:1691
 add_grec+0x69c/0xef0 net/ipv6/mcast.c:1822
 mld_send_cr net/ipv6/mcast.c:1948 [inline]
 mld_ifc_timer_expire+0x33b/0x7b0 net/ipv6/mcast.c:2455
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:kmem_cache_free+0xa9/0x2b0 mm/slab.c:3759
RSP: 0018:ffff8880887cf020 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000007 RBX: ffff88809ea88900 RCX: 1ffff1101254813c
RDX: 0000000000000000 RSI: ffff888092a409c0 RDI: 0000000000000282
RBP: ffff8880a9984a80 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000282
R13: ffffffff84f92548 R14: 0000000000000000 R15: 00000000014000c0
 kfree_skbmem+0x98/0x100 net/core/skbuff.c:586
 __kfree_skb net/core/skbuff.c:646 [inline]
 consume_skb+0xaf/0x330 net/core/skbuff.c:705
 netlink_broadcast_filtered+0x2b3/0x9d0 net/netlink/af_netlink.c:1489
 netlink_broadcast net/netlink/af_netlink.c:1511 [inline]
 nlmsg_multicast include/net/netlink.h:591 [inline]
 nlmsg_notify+0x126/0x170 net/netlink/af_netlink.c:2476
 rtnl_notify net/core/rtnetlink.c:653 [inline]
 rtmsg_ifinfo_send net/core/rtnetlink.c:2930 [inline]
 rtmsg_ifinfo_event.part.0+0x9a/0xc0 net/core/rtnetlink.c:2944
 rtmsg_ifinfo_event net/core/rtnetlink.c:2951 [inline]
 rtmsg_ifinfo+0x64/0x80 net/core/rtnetlink.c:2950
 netdev_state_change net/core/dev.c:1320 [inline]
 netdev_state_change+0xc3/0xd0 net/core/dev.c:1312
 do_setlink+0x23eb/0x2c00 net/core/rtnetlink.c:2280
 rtnl_group_changelink net/core/rtnetlink.c:2512 [inline]
 rtnl_newlink+0xbe4/0x1720 net/core/rtnetlink.c:2666
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315
 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2433
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x620 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x733/0xbe0 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xc5/0x100 net/socket.c:656
 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x443d99
RSP: 002b:00007fff2a053b58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443d99
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00007fff2a053b80 R08: 000000000000bf8c R09: 000000000000bf8c
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff2a053bb0
R13: 00007fff2a053b70 R14: 0000000000000000 R15: 0000000000000000
Code: 8b 4c 24 10 8b 8b 80 00 00 00 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 e0 28 38 87 ff 74 24 10 ff 74 24 20 e8 26 9e 4d fc <0f> 0b e8 34 e0 5e fc 4c 8b 64 24 18 e8 6a 1d 88 fc 48 c7 c1 60 
RIP: skb_panic+0x172/0x174 net/core/skbuff.c:104 RSP: ffff8880aeb07a10
---[ end trace 92e51089cd0e72bc ]---

Crashes (615):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci2-linux-4-14	2020/03/19 02:17	linux-4.14.y	12cd844a	2c31c529	.config	log	report	syz	C	davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2019/12/24 12:11	linux-4.14.y	e1f7d50a	be5c2c81	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-sctp@vger.kernel.org, netdev@vger.kernel.org, nhorman@tuxdriver.com, vyasevich@gmail.com
ci2-linux-4-14	2019/04/20 21:06	linux-4.14.y	68d7a45e	b0e8efcb	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci2-linux-4-14	2020/06/06 14:47	linux-4.14.y	c6db52a8	e6b89e4e	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com
ci2-linux-4-14	2020/06/05 14:08	linux-4.14.y	c6db52a8	d36418e9	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/05 00:34	linux-4.14.y	c6db52a8	6720fdef	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/04 23:30	linux-4.14.y	c6db52a8	6720fdef	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/04 13:48	linux-4.14.y	c6db52a8	6720fdef	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com
ci2-linux-4-14	2020/06/04 08:25	linux-4.14.y	c6db52a8	b0d1c0d5	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/04 06:44	linux-4.14.y	c6db52a8	b0d1c0d5	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/03 13:36	linux-4.14.y	c6db52a8	a5ce5de0	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com
ci2-linux-4-14	2020/06/02 14:22	linux-4.14.y	4f68020f	52fd7b7d	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/02 12:52	linux-4.14.y	4f68020f	52fd7b7d	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/02 10:47	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/02 05:28	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/02 03:46	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/02 00:50	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/01 20:52	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/01 19:07	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/01 16:40	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/01 13:28	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/01 10:26	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/01 09:22	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/06/01 00:10	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/31 17:18	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/31 09:09	linux-4.14.y	4f68020f	a0331e89	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/31 01:25	linux-4.14.y	4f68020f	6f3e1c7c	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/30 12:33	linux-4.14.y	4f68020f	954bd312	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/30 10:52	linux-4.14.y	4f68020f	954bd312	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/30 03:39	linux-4.14.y	4f68020f	954bd312	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/29 23:27	linux-4.14.y	4f68020f	bed08304	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/29 15:00	linux-4.14.y	4f68020f	bed08304	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com
ci2-linux-4-14	2020/05/29 11:08	linux-4.14.y	4f68020f	d19ed305	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/29 10:02	linux-4.14.y	4f68020f	d19ed305	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/29 01:31	linux-4.14.y	4f68020f	d19ed305	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/28 14:06	linux-4.14.y	4f68020f	c7192a2f	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com
ci2-linux-4-14	2020/05/28 12:51	linux-4.14.y	4f68020f	c7192a2f	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/27 22:58	linux-4.14.y	4f68020f	9072c126	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/27 11:06	linux-4.14.y	a41ba30d	9072c126	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/27 02:17	linux-4.14.y	a41ba30d	9072c126	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/26 09:28	linux-4.14.y	a41ba30d	8ca3b7d2	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/26 08:21	linux-4.14.y	a41ba30d	8ca3b7d2	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/26 01:22	linux-4.14.y	a41ba30d	8ca3b7d2	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/24 23:55	linux-4.14.y	a41ba30d	ce7ca010	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/24 21:58	linux-4.14.y	a41ba30d	ce7ca010	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/24 14:26	linux-4.14.y	a41ba30d	ce7ca010	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2020/05/24 11:19	linux-4.14.y	a41ba30d	96c92ad3	.config	log	report			davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci2-linux-4-14	2019/04/12 14:42	linux-4.14.y	1ec8f1f0	4f421599	.config	log	report			davem@davemloft.net, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com