general protection fault, probably for non-canonical address 0xfbd5a5d5a0000004: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xdead4ead00000020-0xdead4ead00000027] CPU: 1 PID: 7085 Comm: syz-executor.4 Not tainted 5.8.0-rc5-next-20200715-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ipv6_addr_equal include/net/ipv6.h:579 [inline] RIP: 0010:xfrm6_addr_equal include/net/xfrm.h:1699 [inline] RIP: 0010:__xfrm6_tunnel_spi_lookup+0x22b/0x3b0 net/ipv6/xfrm6_tunnel.c:82 Code: 89 e0 48 c1 e8 03 80 3c 28 00 0f 85 5b 01 00 00 4d 8b 24 24 4d 85 e4 74 53 e8 b1 43 7b fa 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 2d 01 00 00 4d 8b 7c 24 20 49 8d 7c 24 28 48 89 RSP: 0018:ffffc9001776f5c8 EFLAGS: 00010a02 RAX: 1bd5a9d5a0000004 RBX: 0000000000000023 RCX: ffffc90011cb5000 RDX: 0000000000040000 RSI: ffffffff86f8eebf RDI: dead4ead00000020 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88804b59aa50 R10: fffffbfff1571b09 R11: 0000000000000000 R12: dead4ead00000000 R13: 0200000000000000 R14: 0000000000000120 R15: dffffc0000000000 FS: 00007f9304e84700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56d0581db8 CR3: 000000009500c000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xfrm6_tunnel_spi_lookup+0x8a/0x1d0 net/ipv6/xfrm6_tunnel.c:95 xfrmi6_rcv_tunnel+0xb9/0x100 net/xfrm/xfrm_interface.c:824 tunnel46_rcv+0xef/0x2b0 net/ipv6/tunnel6.c:193 ip6_protocol_deliver_rcu+0x2e8/0x1670 net/ipv6/ip6_input.c:433 ip6_input_finish+0x7f/0x160 net/ipv6/ip6_input.c:474 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:483 ip6_mc_input+0x411/0xea0 net/ipv6/ip6_input.c:577 dst_input include/net/dst.h:449 [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+0x28e/0x3c0 net/ipv6/ip6_input.c:307 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5287 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5401 netif_receive_skb_internal net/core/dev.c:5503 [inline] netif_receive_skb+0x159/0x990 net/core/dev.c:5562 tun_rx_batched.isra.0+0x460/0x720 drivers/net/tun.c:1518 tun_get_user+0x23b2/0x35b0 drivers/net/tun.c:1972 tun_chr_write_iter+0xba/0x151 drivers/net/tun.c:2001 call_write_iter include/linux/fs.h:1879 [inline] new_sync_write+0x422/0x650 fs/read_write.c:515 vfs_write+0x59d/0x6b0 fs/read_write.c:595 ksys_write+0x12d/0x250 fs/read_write.c:648 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416661 Code: Bad RIP value. RSP: 002b:00007f9304e83c60 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000050b3c0 RCX: 0000000000416661 RDX: 00000000000001ce RSI: 0000000020000240 RDI: 00000000000000f0 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 00007f9304e849d0 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c4a R14: 00000000004ce8f4 R15: 00007f9304e846d4 Modules linked in: ---[ end trace aaaac076c30fe0a3 ]--- RIP: 0010:ipv6_addr_equal include/net/ipv6.h:579 [inline] RIP: 0010:xfrm6_addr_equal include/net/xfrm.h:1699 [inline] RIP: 0010:__xfrm6_tunnel_spi_lookup+0x22b/0x3b0 net/ipv6/xfrm6_tunnel.c:82 Code: 89 e0 48 c1 e8 03 80 3c 28 00 0f 85 5b 01 00 00 4d 8b 24 24 4d 85 e4 74 53 e8 b1 43 7b fa 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 2d 01 00 00 4d 8b 7c 24 20 49 8d 7c 24 28 48 89 RSP: 0018:ffffc9001776f5c8 EFLAGS: 00010a02 RAX: 1bd5a9d5a0000004 RBX: 0000000000000023 RCX: ffffc90011cb5000 RDX: 0000000000040000 RSI: ffffffff86f8eebf RDI: dead4ead00000020 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88804b59aa50 R10: fffffbfff1571b09 R11: 0000000000000000 R12: dead4ead00000000 R13: 0200000000000000 R14: 0000000000000120 R15: dffffc0000000000 FS: 00007f9304e84700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56d0581db8 CR3: 000000009500c000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400