IPv6: ADDRCONF(NETDEV_CHANGE): ÿ: link becomes ready
skbuff: skb_over_panic: text:00000000155070ac len:56 put:8 head:00000000bf6e3665 data:000000001cf20f18 tail:0xc8 end:0xc0 dev:ip6tnl0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 22606 Comm: syz-executor.0 Not tainted 4.14.157-syzkaller #0
task: 000000003cacd9fe task.stack: 000000007918f02c
RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104
RSP: 0018:ffff8881dba079d8 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff8881a184c280 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff9686a420 RDI: ffffed103b740f2d
RBP: ffffffff96a8a0a0 R08: 0000000000000085 R09: ffffed103b744ce9
R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: ffffffff9618664e
R13: 0000000000000008 R14: ffff8881a1708000 R15: 00000000000000c0
FS:  00007fd959e2c700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 00000001cbd82005 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put.cold+0x24/0x24 net/core/skbuff.c:1699
 mld_newpack+0x4ce/0x7a0 net/ipv6/mcast.c:1608
 add_grhead.isra.0+0x29c/0x370 net/ipv6/mcast.c:1691
 add_grec+0x6a3/0xf10 net/ipv6/mcast.c:1822
 mld_send_cr net/ipv6/mcast.c:1948 [inline]
 mld_ifc_timer_expire+0x340/0x7e0 net/ipv6/mcast.c:2455
 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279
 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318
 __run_timers kernel/time/timer.c:1636 [inline]
 run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1649
 __do_softirq+0x234/0x9ec kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x114/0x150 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x60 kernel/kcov.c:85
RSP: 0018:ffff8881a0bfed80 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff10
RAX: ffff8881c9ca9780 RBX: 0000000000000000 RCX: 1ffff11034309840
RDX: ffffffff823a8ade RSI: ffff8881a184c200 RDI: ffff8881a184c204
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff2e370a1
R10: fffffbfff2e370a0 R11: ffffffff971b8507 R12: 0000000000000000
R13: 0000000000000010 R14: ffff8881999ad500 R15: ffff8881a184c140
 nlmsg_put include/net/netlink.h:478 [inline]
 rtnl_fill_ifinfo+0x19e/0x3060 net/core/rtnetlink.c:1322
 rtmsg_ifinfo_build_skb+0x8e/0x130 net/core/rtnetlink.c:2903
 rtmsg_ifinfo_event.part.0+0x2e/0xc0 net/core/rtnetlink.c:2933
 rtmsg_ifinfo_event net/core/rtnetlink.c:2942 [inline]
 rtmsg_ifinfo+0x64/0x80 net/core/rtnetlink.c:2941
 netdev_state_change net/core/dev.c:1320 [inline]
 netdev_state_change+0xe3/0x100 net/core/dev.c:1312
 do_setlink+0x23ce/0x2bd0 net/core/rtnetlink.c:2280
 rtnl_group_changelink net/core/rtnetlink.c:2503 [inline]
 rtnl_newlink+0xbef/0x16b0 net/core/rtnetlink.c:2657
 rtnetlink_rcv_msg+0x3d3/0xb40 net/core/rtnetlink.c:4306
 netlink_rcv_skb+0x137/0x3a0 net/netlink/af_netlink.c:2432
 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
 netlink_unicast+0x478/0x650 net/netlink/af_netlink.c:1312
 netlink_sendmsg+0x66a/0xbe0 net/netlink/af_netlink.c:1877
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb7/0x100 net/socket.c:656
 ___sys_sendmsg+0x752/0x890 net/socket.c:2062
 __sys_sendmsg+0xb6/0x150 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a679
RSP: 002b:00007fd959e2bc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 000000000000000a
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd959e2c6d4
R13: 00000000004c96e1 R14: 00000000004e13d8 R15: 00000000ffffffff
Code: 20 ff 4c 8b 4c 24 10 8b 4b 78 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 9a a8 96 ff 74 24 10 ff 74 24 20 e8 e9 9d ee fe <0f> 0b e8 67 78 fd fe 4c 8b 64 24 18 e8 fd 3e 20 ff 48 c7 c1 60 
RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff8881dba079d8
---[ end trace 64fd58ba6a29a8f4 ]---