skbuff: skb_under_panic: text:ffffffff899fc770 len:120 put:44 head:ffff8880233e3000 data:ffff8880233e2fe4 tail:0x5c end:0x6c0 dev:macvlan2 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:207! invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 5560 Comm: kworker/1:4 Not tainted 6.9.0-rc7-syzkaller-00012-gdccb07f2914c #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: mld mld_ifc_work RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:207 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 20 22 2c 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 5a 1f bd f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 d4 c8 37 f9 4c RSP: 0018:ffffc9000405f718 EFLAGS: 00010282 RAX: 000000000000008a RBX: ffff88801f2cd540 RCX: ffffffff816e81e9 RDX: 0000000000000000 RSI: ffffffff816f0f26 RDI: 0000000000000005 RBP: ffffffff8c2c3420 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000005 R12: ffffffff899fc770 R13: 000000000000002c R14: ffff888044dfe130 R15: 00000000000006c0 FS: 0000000000000000(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7390e3f000 CR3: 000000002aa8e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_under_panic net/core/skbuff.c:217 [inline] skb_push+0xca/0xf0 net/core/skbuff.c:2609 ip6gre_header+0xc0/0x8e0 net/ipv6/ip6_gre.c:1387 dev_hard_header include/linux/netdevice.h:3145 [inline] vlan_dev_hard_header+0x13f/0x520 net/8021q/vlan_dev.c:83 dev_hard_header include/linux/netdevice.h:3145 [inline] macvlan_hard_header+0xce/0x150 drivers/net/macvlan.c:603 dev_hard_header include/linux/netdevice.h:3145 [inline] neigh_resolve_output net/core/neighbour.c:1558 [inline] neigh_resolve_output+0x545/0x950 net/core/neighbour.c:1543 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x673/0x18b0 net/ipv6/ip6_output.c:137 __ip6_finish_output net/ipv6/ip6_output.c:211 [inline] ip6_finish_output+0x3f9/0x1300 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x1eb/0x540 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] mld_sendpack+0x9ee/0x11d0 net/ipv6/mcast.c:1818 mld_send_cr net/ipv6/mcast.c:2119 [inline] mld_ifc_work+0x756/0xce0 net/ipv6/mcast.c:2650 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3348 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3429 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:207 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 20 22 2c 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 5a 1f bd f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 d4 c8 37 f9 4c RSP: 0018:ffffc9000405f718 EFLAGS: 00010282 RAX: 000000000000008a RBX: ffff88801f2cd540 RCX: ffffffff816e81e9 RDX: 0000000000000000 RSI: ffffffff816f0f26 RDI: 0000000000000005 RBP: ffffffff8c2c3420 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000005 R12: ffffffff899fc770 R13: 000000000000002c R14: ffff888044dfe130 R15: 00000000000006c0 FS: 0000000000000000(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d0bf86d58 CR3: 00000000220d2000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400