IPv6: ADDRCONF(NETDEV_CHANGE): ÿ: link becomes ready skbuff: skb_over_panic: text:00000000ceed2ae9 len:56 put:8 head:00000000418f58ed data:000000002038b71c 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: 5306 Comm: syz-executor.3 Not tainted 4.14.155-syzkaller #0 task: 00000000fc8e3f3b task.stack: 0000000089208fd2 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: 0018:ffff8881dba079d8 EFLAGS: 00010286 RAX: 0000000000000085 RBX: ffff8881a5d593c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffffb926a380 RDI: ffffed103b740f2d RBP: ffffffffb9489fe0 R08: 0000000000000085 R09: ffffed103b744ce9 R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: ffffffffb8b85d2e R13: 0000000000000008 R14: ffff88819810a200 R15: 00000000000000c0 FS: 00000000021a4940(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb665754038 CR3: 00000001d4b22004 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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 selinux_nlmsg_perm: 69 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 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 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x59/0x70 kernel/locking/spinlock.c:192 RSP: 0018:ffff88819a0f7bf0 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: 0000000000000292 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000292 RBP: ffff8881cef89220 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8881985c5df0 R14: ffff88819a0f7cdc R15: ffff8881985c6330 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 do_wait+0x31a/0x950 kernel/exit.c:1556 kernel_wait4+0x116/0x210 kernel/exit.c:1675 SYSC_wait4 kernel/exit.c:1687 [inline] SyS_wait4+0x130/0x140 kernel/exit.c:1683 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x41447a RSP: 002b:00007fff956d4428 EFLAGS: 00000246 ORIG_RAX: 000000000000003d SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 RAX: ffffffffffffffda RBX: 00000000000664a5 RCX: 000000000041447a SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=23939 comm=syz-executor.3 RDX: 0000000040000001 RSI: 00007fff956d4460 RDI: ffffffffffffffff RBP: 00000000000004d0 R08: 0000000000000001 R09: 00000000021a4940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000013 R13: 00007fff956d4460 R14: 000000000006644a R15: 00007fff956d4470 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 00 9a 48 b9 ff 74 24 10 ff 74 24 20 e8 e9 a3 ee fe <0f> 0b e8 87 7e fd fe 4c 8b 64 24 18 e8 5d 44 20 ff 48 c7 c1 a0 RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff8881dba079d8 ---[ end trace 3866a5b97ccb37bd ]---