------------[ cut here ]------------
WARNING: CPU: 2 PID: 7155 at mm/gup.c:1173 __get_user_pages+0xd49/0x1080 mm/gup.c:1173
Modules linked in:
CPU: 2 PID: 7155 Comm: syz-executor.3 Not tainted 6.4.0-syzkaller-08881-g533925cb7604 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:__get_user_pages+0xd49/0x1080 mm/gup.c:1173
Code: 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 bc 02 00 00 48 8b 44 24 20 48 8b 80 c0 00 00 00 48 8d 1c e8 e9 ad f7 ff ff e8 17 31 c3 ff <0f> 0b e9 32 f6 ff ff e8 0b 31 c3 ff 0f 0b e8 04 31 c3 ff 44 89 ed
RSP: 0018:ffffc90002d0f538 EFLAGS: 00010216
RAX: 0000000000000267 RBX: 0000000000000100 RCX: ffffc900063d9000
RDX: 0000000000040000 RSI: ffffffff81c186f9 RDI: 0000000000000007
RBP: 0000000020006000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000001 R12: ffff88801ca83800
R13: 0000000000210002 R14: ffff88801b98d580 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7f72b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f737b028 CR3: 0000000026aee000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __get_user_pages_locked mm/gup.c:1456 [inline]
 __gup_longterm_locked+0x6f9/0x23e0 mm/gup.c:2150
 internal_get_user_pages_fast+0x16e6/0x32f0 mm/gup.c:3148
 get_user_pages_fast+0xa8/0xf0 mm/gup.c:3226
 __iov_iter_get_pages_alloc+0x28c/0x1950 lib/iov_iter.c:1111
 iov_iter_get_pages2+0xa8/0x100 lib/iov_iter.c:1151
 iter_to_pipe fs/splice.c:1402 [inline]
 vmsplice_to_pipe fs/splice.c:1492 [inline]
 __do_sys_vmsplice+0x50c/0xaa0 fs/splice.c:1556
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f77579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f725cc EFLAGS: 00000296 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200000c0
RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	retq
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi