------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:2295! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 5888 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: mld mld_ifc_work RIP: 0010:pskb_expand_head+0x12da/0x1320 net/core/skbuff.c:2295 Code: f8 e9 81 f3 ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e0 f3 ff ff 4c 89 ff e8 71 7a ba f8 e9 d3 f3 ff ff e8 47 55 50 f8 90 <0f> 0b e8 3f 55 50 f8 90 0f 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f RSP: 0000:ffffc90003d87590 EFLAGS: 00010293 RAX: ffffffff89753669 RBX: ffff888030ad2dc0 RCX: ffff88805c889e40 RDX: 0000000000000000 RSI: 0000000093ca53c0 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000004c R10: dffffc0000000000 R11: ffffffff8a32c890 R12: dffffc0000000000 R13: 0000000000000820 R14: 0000000093ca53c0 R15: 00000000000006c0 FS: 0000000000000000(0000) GS:ffff888125467000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c36218e CR3: 000000005baa8000 CR4: 00000000003526f0 Call Trace: ipgre_header+0xd5/0x350 net/ipv4/ip_gre.c:900 dev_hard_header include/linux/netdevice.h:3439 [inline] neigh_connected_output+0x286/0x460 net/core/neighbour.c:1643 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:246 NF_HOOK+0xa2/0x3a0 include/linux/netfilter.h:318 mld_sendpack+0x8b4/0xe40 net/ipv6/mcast.c:1855 mld_send_cr net/ipv6/mcast.c:2154 [inline] mld_ifc_work+0x835/0xe70 net/ipv6/mcast.c:2693 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pskb_expand_head+0x12da/0x1320 net/core/skbuff.c:2295 Code: f8 e9 81 f3 ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e0 f3 ff ff 4c 89 ff e8 71 7a ba f8 e9 d3 f3 ff ff e8 47 55 50 f8 90 <0f> 0b e8 3f 55 50 f8 90 0f 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f RSP: 0000:ffffc90003d87590 EFLAGS: 00010293 RAX: ffffffff89753669 RBX: ffff888030ad2dc0 RCX: ffff88805c889e40 RDX: 0000000000000000 RSI: 0000000093ca53c0 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000004c R10: dffffc0000000000 R11: ffffffff8a32c890 R12: dffffc0000000000 R13: 0000000000000820 R14: 0000000093ca53c0 R15: 00000000000006c0 FS: 0000000000000000(0000) GS:ffff888125467000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2dd96317e8 CR3: 000000005248c000 CR4: 00000000003526f0