No origin for address ffff880156470000 (page ffffea000805aa00), size=0
------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan.c:1342!
invalid opcode: 0000 [#1] SMP PTI
CPU: 1 PID: 29436 Comm: syz-executor2 Not tainted 4.18.0-rc8+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_get_origin_address+0x3a7/0x3d0 mm/kmsan/kmsan.c:1341
Code: c0 00 10 1b 8a 48 c7 c3 00 f0 1a 8a 80 7d d4 00 48 0f 45 d8 48 89 d8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b eb fe <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 c7 fe ff ff 48 8b 14 25 10 60 
RSP: 0018:ffff8800574eeb38 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000007092 RDI: 0000000000007093
RBP: ffff8800574eeb68 R08: 0000000000000000 R09: ffff88021fd39090
R10: 0000000000000000 R11: ffffffff85031d70 R12: 0000000000000001
R13: ffffea000805aa00 R14: ffff880156470000 R15: 0000000000000000
FS:  00007f962ede5700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000056652000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 kmsan_memmove_origins+0xbd/0x1d0 mm/kmsan/kmsan.c:443
 __msan_memmove+0xda/0x130 mm/kmsan/kmsan_instr.c:381
 move_right lib/vsprintf.c:560 [inline]
 widen_string+0x580/0x6c0 lib/vsprintf.c:583
 string+0x32a/0x340 lib/vsprintf.c:612
 vsnprintf+0x10aa/0x31a0 lib/vsprintf.c:2267
 seq_vprintf fs/seq_file.c:403 [inline]
 seq_printf+0x2cb/0x460 fs/seq_file.c:418
 dev_seq_printf_stats net/core/net-procfs.c:83 [inline]
 dev_seq_show+0x9ee/0xba0 net/core/net-procfs.c:115
 seq_read+0x1744/0x2240 fs/seq_file.c:275
 proc_reg_read+0x1e1/0x2f0 fs/proc/inode.c:229
 do_loop_readv_writev fs/read_write.c:700 [inline]
 do_iter_read+0x884/0xd80 fs/read_write.c:924
 vfs_readv+0x1d9/0x250 fs/read_write.c:986
 kernel_readv fs/splice.c:362 [inline]
 default_file_splice_read+0xa80/0x10e0 fs/splice.c:417
 do_splice_to fs/splice.c:881 [inline]
 splice_direct_to_actor+0x4af/0xfb0 fs/splice.c:953
 do_splice_direct+0x332/0x540 fs/splice.c:1062
 do_sendfile+0x1090/0x1df0 fs/read_write.c:1440
 __do_sys_sendfile64 fs/read_write.c:1495 [inline]
 __se_sys_sendfile64+0x1c2/0x380 fs/read_write.c:1487
 __x64_sys_sendfile64+0x11e/0x170 fs/read_write.c:1487
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457089
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f962ede4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f962ede56d4 RCX: 0000000000457089
RDX: 0000000020000000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000008010 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d3cb0 R14: 00000000004c8769 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 5788a1344f174b35 ]---
RIP: 0010:kmsan_get_origin_address+0x3a7/0x3d0 mm/kmsan/kmsan.c:1341
Code: c0 00 10 1b 8a 48 c7 c3 00 f0 1a 8a 80 7d d4 00 48 0f 45 d8 48 89 d8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b eb fe <0f> 0b eb fe 48 3d ff ff ff 1f 0f 87 c7 fe ff ff 48 8b 14 25 10 60 
RSP: 0018:ffff8800574eeb38 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000007092 RDI: 0000000000007093
RBP: ffff8800574eeb68 R08: 0000000000000000 R09: ffff88021fd39090
R10: 0000000000000000 R11: ffffffff85031d70 R12: 0000000000000001
R13: ffffea000805aa00 R14: ffff880156470000 R15: 0000000000000000
FS:  00007f962ede5700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000056652000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600