BUG: unable to handle kernel paging request at ffff880041347ffc
PGD ae45067 P4D ae45067 PUD 6cf5d063 PMD 41324063 PTE 8000000041347061
Oops: 0003 [#1] SMP PTI
CPU: 0 PID: 15166 Comm: syz-executor7 Not tainted 4.19.0-rc1+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_memmove_origins+0x171/0x1d0 mm/kmsan/kmsan.c:463
Code: 45 85 ed 74 1a 41 39 df 74 15 be 01 00 00 00 44 89 ff e8 92 fc ff ff 89 c3 85 c0 41 0f 44 df 45 85 ed 44 0f 45 eb 48 8b 45 98 <46> 89 2c 20 49 63 c6 44 8d 70 01 49 83 c4 fc 48 39 45 a8 77 8a 4c
RSP: 0018:ffff880040f5f320 EFLAGS: 00010046
RAX: ffff880041348008 RBX: 0000000000000000 RCX: 00000000411b0078
RDX: 0000000000000100 RSI: ffff88021fff2000 RDI: 0000000000000100
RBP: ffff880040f5f388 R08: ffffffff7fffffff R09: ffffffffffffffff
R10: ffffffffffffffff R11: ffffffffffffffff R12: fffffffffffffff4
R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000000
FS:  00007fed8bf4e700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff880041347ffc CR3: 000000007da46000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __msan_memmove+0xc3/0x130 mm/kmsan/kmsan_instr.c:381
 nf_ct_frag6_reasm net/ipv6/netfilter/nf_conntrack_reasm.c:431 [inline]
 nf_ct_frag6_gather+0x406f/0x53b0 net/ipv6/netfilter/nf_conntrack_reasm.c:590
 ipv6_defrag+0x501/0x5c0 net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:69
 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline]
 nf_hook_slow+0x15d/0x3e0 net/netfilter/core.c:511
 nf_hook include/linux/netfilter.h:242 [inline]
 NF_HOOK include/linux/netfilter.h:285 [inline]
 ipv6_rcv+0x252/0x3c0 net/ipv6/ip6_input.c:271
 __netif_receive_skb_one_core net/core/dev.c:4892 [inline]
 __netif_receive_skb net/core/dev.c:5002 [inline]
 netif_receive_skb_internal+0x5bd/0x970 net/core/dev.c:5105
 netif_receive_skb+0x230/0x240 net/core/dev.c:5178
 tun_rx_batched drivers/net/tun.c:1572 [inline]
 tun_get_user+0x6aa5/0x7f70 drivers/net/tun.c:1982
 tun_chr_write_iter+0x1d4/0x330 drivers/net/tun.c:2010
 do_iter_readv_writev+0x874/0xa50 include/linux/fs.h:1801
 do_iter_write+0x302/0xd80 fs/read_write.c:959
 vfs_writev fs/read_write.c:1004 [inline]
 do_writev+0x3be/0x820 fs/read_write.c:1039
 __do_sys_writev fs/read_write.c:1112 [inline]
 __se_sys_writev+0x9b/0xb0 fs/read_write.c:1109
 __x64_sys_writev+0x4a/0x70 fs/read_write.c:1109
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x456f51
Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 b6 fb ff c3 48 83 ec 08 e8 da 2c 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 23 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fed8bf4dba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000000004a RCX: 0000000000456f51
RDX: 0000000000000001 RSI: 00007fed8bf4dbf0 RDI: 00000000000000f0
RBP: 0000000020000000 R08: 00000000000000f0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff
R13: 00000000004d6ff0 R14: 00000000004ca100 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: ffff880041347ffc
---[ end trace 74e25554236ab951 ]---
RIP: 0010:kmsan_memmove_origins+0x171/0x1d0 mm/kmsan/kmsan.c:463
Code: 45 85 ed 74 1a 41 39 df 74 15 be 01 00 00 00 44 89 ff e8 92 fc ff ff 89 c3 85 c0 41 0f 44 df 45 85 ed 44 0f 45 eb 48 8b 45 98 <46> 89 2c 20 49 63 c6 44 8d 70 01 49 83 c4 fc 48 39 45 a8 77 8a 4c
RSP: 0018:ffff880040f5f320 EFLAGS: 00010046
RAX: ffff880041348008 RBX: 0000000000000000 RCX: 00000000411b0078
RDX: 0000000000000100 RSI: ffff88021fff2000 RDI: 0000000000000100
RBP: ffff880040f5f388 R08: ffffffff7fffffff R09: ffffffffffffffff
R10: ffffffffffffffff R11: ffffffffffffffff R12: fffffffffffffff4
R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000000
FS:  00007fed8bf4e700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff880041347ffc CR3: 000000007da46000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400