general protection fault, probably for non-canonical address 0xdffffc0000001f7f: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x000000000000fbf8-0x000000000000fbff] CPU: 0 PID: 23539 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kfree_skb_list net/core/skbuff.c:781 [inline] RIP: 0010:skb_release_data+0x58f/0x790 net/core/skbuff.c:675 Code: 0f 85 8b 01 00 00 49 bc 00 00 00 00 00 fc ff df 49 8b 6d 08 48 85 ed 75 05 eb 2b 48 89 dd e8 58 95 5e fa 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 26 01 00 00 48 8b 5d 00 48 89 ef e8 0a f6 ff RSP: 0018:ffffc900047df468 EFLAGS: 00010203 RAX: 0000000000001f7f RBX: 0000000000000000 RCX: ffffc9000fff1000 RDX: 0000000000040000 RSI: ffffffff8718dd38 RDI: ffff888019658088 RBP: 000000000000fbff R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8718dae0 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888019658080 R14: ffff888027a52640 R15: 0000000000000000 FS: 00007fe0d4584700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0d711e000 CR3: 000000009207c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all net/core/skbuff.c:742 [inline] __kfree_skb net/core/skbuff.c:756 [inline] kfree_skb net/core/skbuff.c:774 [inline] kfree_skb+0x133/0x3f0 net/core/skbuff.c:768 __ip6_tnl_rcv+0x8af/0x1100 net/ipv6/ip6_tunnel.c:878 ip6gre_rcv net/ipv6/ip6_gre.c:517 [inline] gre_rcv+0x749/0x1280 net/ipv6/ip6_gre.c:620 ip6_protocol_deliver_rcu+0x2e9/0x1ca0 net/ipv6/ip6_input.c:422 ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472 ip6_mc_input+0x3ef/0xeb0 net/ipv6/ip6_input.c:566 dst_input include/net/dst.h:460 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5462 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5576 netif_receive_skb_internal net/core/dev.c:5662 [inline] netif_receive_skb+0x13e/0x8e0 net/core/dev.c:5721 tun_rx_batched.isra.0+0x460/0x720 drivers/net/tun.c:1460 tun_get_user+0x24d0/0x36d0 drivers/net/tun.c:1907 tun_chr_write_iter+0xdd/0x1a0 drivers/net/tun.c:1937 call_write_iter include/linux/fs.h:2161 [inline] new_sync_write+0x429/0x660 fs/read_write.c:503 vfs_write+0x7cd/0xae0 fs/read_write.c:590 ksys_write+0x12d/0x250 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe0d6fc15ff Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48 RSP: 002b:00007fe0d4584150 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe0d7121f60 RCX: 00007fe0d6fc15ff RDX: 000000000000003e RSI: 0000000020000000 RDI: 00000000000000f0 RBP: 00007fe0d7068f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007fffe139675f R14: 00007fe0d4584300 R15: 0000000000022000 Modules linked in: ---[ end trace 197f36152524b49c ]--- RIP: 0010:kfree_skb_list net/core/skbuff.c:781 [inline] RIP: 0010:skb_release_data+0x58f/0x790 net/core/skbuff.c:675 Code: 0f 85 8b 01 00 00 49 bc 00 00 00 00 00 fc ff df 49 8b 6d 08 48 85 ed 75 05 eb 2b 48 89 dd e8 58 95 5e fa 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 26 01 00 00 48 8b 5d 00 48 89 ef e8 0a f6 ff RSP: 0018:ffffc900047df468 EFLAGS: 00010203 RAX: 0000000000001f7f RBX: 0000000000000000 RCX: ffffc9000fff1000 RDX: 0000000000040000 RSI: ffffffff8718dd38 RDI: ffff888019658088 RBP: 000000000000fbff R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8718dae0 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888019658080 R14: ffff888027a52640 R15: 0000000000000000 FS: 00007fe0d4584700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0d711e000 CR3: 000000009207c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 85 8b 01 00 00 jne 0x191 6: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 d: fc ff df 10: 49 8b 6d 08 mov 0x8(%r13),%rbp 14: 48 85 ed test %rbp,%rbp 17: 75 05 jne 0x1e 19: eb 2b jmp 0x46 1b: 48 89 dd mov %rbx,%rbp 1e: e8 58 95 5e fa callq 0xfa5e957b 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 0f 85 26 01 00 00 jne 0x15b 35: 48 8b 5d 00 mov 0x0(%rbp),%rbx 39: 48 89 ef mov %rbp,%rdi 3c: e8 .byte 0xe8 3d: 0a f6 or %dh,%dh 3f: ff .byte 0xff