IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16806 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16806 comm=syz-executor.5 skbuff: skb_over_panic: text:00000000762d5cf8 len:56 put:8 head:0000000036b3a754 data:000000003df8020f tail:0xc8 end:0xc0 dev:ip6tnl0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:104! invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16806 comm=syz-executor.5 Modules linked in: CPU: 0 PID: 16624 Comm: syz-executor.4 Not tainted 4.14.157-syzkaller #0 task: 0000000077b08949 task.stack: 00000000e24aded1 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: 0018:ffff8881dba079d8 EFLAGS: 00010286 RAX: 0000000000000085 RBX: ffff88819742c500 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffffa366a420 RDI: ffffed103b740f2d RBP: ffffffffa388a0a0 R08: 0000000000000085 R09: ffffed103b744ce9 R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: ffffffffa2f8664e R13: 0000000000000008 R14: ffff8881a3b38000 R15: 00000000000000c0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16806 comm=syz-executor.5 FS: 00007f35c3020700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f35c2fff000 CR3: 00000001a1b32006 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16806 comm=syz-executor.5 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: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16806 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16806 comm=syz-executor.5 add_grhead.isra.0+0x29c/0x370 net/ipv6/mcast.c:1691 add_grec+0x6a3/0xf10 net/ipv6/mcast.c:1822 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16806 comm=syz-executor.5 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 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:ffff88819ab879a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: 0000000000000246 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000246 RBP: ffff8881d6a20d00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000041 R15: 1ffff11033570f39 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline] __wake_up_common_lock+0xe0/0x170 kernel/sched/wait.c:126 pipe_write+0x835/0xe20 fs/pipe.c:496 call_write_iter include/linux/fs.h:1798 [inline] do_iter_readv_writev+0x379/0x580 fs/read_write.c:679 do_iter_write fs/read_write.c:958 [inline] do_iter_write+0x152/0x550 fs/read_write.c:939 vfs_writev+0x146/0x2d0 fs/read_write.c:1003 do_writev+0x10c/0x2e0 fs/read_write.c:1038 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x426dbe RSP: 002b:00007f35c301f9a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 0000000000000041 RCX: 0000000000426dbe RDX: 0000000000000005 RSI: 00007f35c301f9a0 RDI: 0000000000000002 RBP: 00007f35c301fb80 R08: 0000000000000005 R09: 0000000000000014 R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000004 R13: 00007f35c301f9a0 R14: 0000000000000002 R15: 0000000000000001 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 88 a3 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 5450821b353eceff ]---