ip6_tunnel: ip6gretap0 xmit: Local address not yet configured! skbuff: skb_over_panic: text:ffffffff87bbe34f len:40 put:40 head:ffff8880187d8c00 data:ffff8880187d8cb0 tail:0xd8 end:0xc0 dev:ip6gretap0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:109! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 297 Comm: kworker/u4:4 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:109 Code: f8 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 bb 65 8a ff 74 24 10 ff 74 24 20 e8 ec c4 c4 ff <0f> 0b e8 bc b4 75 f8 4c 8b 64 24 18 e8 f2 65 b9 f8 48 c7 c1 80 c7 RSP: 0018:ffffc90000dc0968 EFLAGS: 00010286 RAX: 0000000000000089 RBX: ffff8880128ad8c0 RCX: 0000000000000000 RDX: ffff888011ff1c40 RSI: ffffffff815c4d25 RDI: fffff520001b811f RBP: ffffffff8a65c7c0 R08: 0000000000000089 R09: 0000000000000000 R10: ffffffff815bdabe R11: 0000000000000000 R12: ffffffff87bbe34f R13: 0000000000000028 R14: ffff88802ee58000 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd1d8bf3a7 CR3: 000000005a7ba000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:114 [inline] skb_put.cold+0x24/0x24 net/core/skbuff.c:1914 ip6_mc_hdr.constprop.0+0x11f/0x5c0 net/ipv6/mcast.c:1573 mld_newpack+0x3d8/0x770 net/ipv6/mcast.c:1624 add_grhead+0x265/0x330 net/ipv6/mcast.c:1710 add_grec+0xe2c/0x1090 net/ipv6/mcast.c:1841 mld_send_cr net/ipv6/mcast.c:1967 [inline] mld_ifc_timer_expire+0x596/0xf10 net/ipv6/mcast.c:2474 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1431 expire_timers kernel/time/timer.c:1476 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1745 __run_timers kernel/time/timer.c:1726 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1758 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345 invoke_softirq kernel/softirq.c:221 [inline] __irq_exit_rcu kernel/softirq.c:422 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:434 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:trace_lock_release include/trace/events/lock.h:58 [inline] RIP: 0010:lock_release+0x516/0x720 kernel/locking/lockdep.c:5522 Code: 14 11 38 d0 7c 08 84 d2 0f 85 f3 01 00 00 44 8b 05 37 b8 6b 0c 45 85 c0 0f 85 a5 fe ff ff e9 21 13 69 07 65 ff 05 da 49 a8 7e <48> 8b 05 93 9f 57 0c e8 ee 8b a9 07 85 c0 74 0d 80 3d cf 25 57 0c RSP: 0018:ffffc90001ccfa80 EFLAGS: 00000283 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8159a171 RDX: fffffbfff1b8a5a2 RSI: 0000000000000008 RDI: ffffffff8dc52d08 RBP: 1ffff92000399f52 R08: 0000000000000000 R09: ffffffff8dc52d0f R10: fffffbfff1b8a5a1 R11: 0000000000000000 R12: ffffffff8bf74360 R13: ffffc90001ccfca8 R14: 000000000000000a R15: dffffc0000000000 rcu_lock_release include/linux/rcupdate.h:272 [inline] rcu_read_unlock include/linux/rcupdate.h:710 [inline] inet_twsk_purge+0x54e/0x7c0 net/ipv4/inet_timewait_sock.c:299 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:178 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Modules linked in: ---[ end trace cd3a452bfbfbd8de ]--- RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:109 Code: f8 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 bb 65 8a ff 74 24 10 ff 74 24 20 e8 ec c4 c4 ff <0f> 0b e8 bc b4 75 f8 4c 8b 64 24 18 e8 f2 65 b9 f8 48 c7 c1 80 c7 RSP: 0018:ffffc90000dc0968 EFLAGS: 00010286 RAX: 0000000000000089 RBX: ffff8880128ad8c0 RCX: 0000000000000000 RDX: ffff888011ff1c40 RSI: ffffffff815c4d25 RDI: fffff520001b811f RBP: ffffffff8a65c7c0 R08: 0000000000000089 R09: 0000000000000000 R10: ffffffff815bdabe R11: 0000000000000000 R12: ffffffff87bbe34f R13: 0000000000000028 R14: ffff88802ee58000 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd1d8bf3a7 CR3: 000000005a7ba000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400