------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:109! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9624 Comm: kworker/1:4 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: mld mld_ifc_work 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 80 ce 65 8a ff 74 24 10 ff 74 24 20 e8 7b c0 c4 ff <0f> 0b e8 e6 e4 73 f8 4c 8b 64 24 18 e8 dc b6 b7 f8 48 c7 c1 c0 da RSP: 0018:ffffc90015f1f960 EFLAGS: 00010282 RAX: 0000000000000082 RBX: ffff88801364fa00 RCX: 0000000000000000 RDX: ffff888063908000 RSI: ffffffff815c51f5 RDI: fffff52002be3f1e RBP: ffffffff8a65db00 R08: 0000000000000082 R09: 0000000000000000 R10: ffffffff815bdf8e R11: 0000000000000000 R12: ffffffff87bce89f R13: 0000000000000028 R14: ffff88802cf16000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f25ffa0f280 CR3: 0000000015651000 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:1722 mld_newpack+0x3d8/0x770 net/ipv6/mcast.c:1773 add_grhead+0x265/0x330 net/ipv6/mcast.c:1859 add_grec+0x10dd/0x14d0 net/ipv6/mcast.c:1997 mld_send_cr net/ipv6/mcast.c:2123 [inline] mld_ifc_work+0x47d/0xdb0 net/ipv6/mcast.c:2660 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 f5c31a5079df03ab ]--- 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 80 ce 65 8a ff 74 24 10 ff 74 24 20 e8 7b c0 c4 ff <0f> 0b e8 e6 e4 73 f8 4c 8b 64 24 18 e8 dc b6 b7 f8 48 c7 c1 c0 da RSP: 0018:ffffc90015f1f960 EFLAGS: 00010282 RAX: 0000000000000082 RBX: ffff88801364fa00 RCX: 0000000000000000 RDX: ffff888063908000 RSI: ffffffff815c51f5 RDI: fffff52002be3f1e RBP: ffffffff8a65db00 R08: 0000000000000082 R09: 0000000000000000 R10: ffffffff815bdf8e R11: 0000000000000000 R12: ffffffff87bce89f R13: 0000000000000028 R14: ffff88802cf16000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ea55b2018 CR3: 0000000025ce7000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400