skbuff: skb_over_panic: text:00000000b6bbaaad len:76 put:20 head:000000006222c5a6 data:000000005fa2d42f tail:0xcc end:0xc0 dev:sit1 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:108! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.13-syzkaller-00778-g8173487568f1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:104 Code: 56 84 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 cc 3c 56 fe 48 83 c4 20 <0f> 0b 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 RSP: 0018:ffff8881dbb09ae8 EFLAGS: 00010286 RAX: 0000000000000083 RBX: ffff8881d999a000 RCX: c56a3109bb171e00 RDX: 0000000000000503 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8881dbb09b30 R08: ffffffff812cee10 R09: ffffed103b765dc0 R10: ffffed103b765dc0 R11: 0000000000000000 R12: ffff8881c9fb0c80 R13: 00000000000000cc R14: 00000000000000c0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004c0fa8 CR3: 000000000460e003 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic+0x2c/0x30 net/core/skbuff.c:113 skb_put+0x205/0x210 net/core/skbuff.c:1866 add_grhead net/ipv6/mcast.c:1717 [inline] add_grec+0xeef/0x12a0 net/ipv6/mcast.c:1844 mld_send_cr net/ipv6/mcast.c:1970 [inline] mld_ifc_timer_expire+0x781/0xc00 net/ipv6/mcast.c:2477 call_timer_fn+0x189/0x390 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0x926/0xb40 kernel/time/timer.c:1773 run_timer_softirq+0x1d/0x40 kernel/time/timer.c:1786 __do_softirq+0x235/0x57e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x173/0x180 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x2e2/0x4c0 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:default_idle+0x55/0xa0 arch/x86/kernel/process.c:581 Code: 26 ea fd 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df 8a 04 03 84 c0 75 26 83 3d 8e ad 0f 01 00 7e 07 0f 00 2d c5 fd 59 00 fb f4 <65> 8b 35 fc 15 7b 7c bf ff ff ff ff e8 ea ce 81 fd 5b 5d c3 48 c7 RSP: 0018:ffff8881da9e7d58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffffffff092c557 RCX: ffffffff83867d0e RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff84962ab8 RBP: ffff8881da9e7d60 R08: dffffc0000000000 R09: fffffbfff092c558 R10: fffffbfff092c558 R11: 0000000000000000 R12: ffffffff84750f20 R13: 0000000000000001 R14: dffffc0000000000 R15: 1ffff1103b537760 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571 default_idle_call kernel/sched/idle.c:94 [inline] cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x209/0x5c0 kernel/sched/idle.c:263 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:355 start_secondary+0x33f/0x3d0 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 Modules linked in: ---[ end trace 1e2e501b41da770d ]--- RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:104 Code: 56 84 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 cc 3c 56 fe 48 83 c4 20 <0f> 0b 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 RSP: 0018:ffff8881dbb09ae8 EFLAGS: 00010286 RAX: 0000000000000083 RBX: ffff8881d999a000 RCX: c56a3109bb171e00 RDX: 0000000000000503 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8881dbb09b30 R08: ffffffff812cee10 R09: ffffed103b765dc0 R10: ffffed103b765dc0 R11: 0000000000000000 R12: ffff8881c9fb0c80 R13: 00000000000000cc R14: 00000000000000c0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004c0fa8 CR3: 000000000460e003 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400