------------[ cut here ]------------
WARNING: CPU: 3 PID: 6469 at mm/gup.c:1173 __get_user_pages+0xd49/0x1080 mm/gup.c:1173
Modules linked in:
CPU: 3 PID: 6469 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:ffffc90028dd7748 EFLAGS: 00010212
RAX: 000000000000475c RBX: 0000000000000100 RCX: ffffc9000c252000
RDX: 0000000000040000 RSI: ffffffff81c186f9 RDI: 0000000000000007
RBP: 0000000020001000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000001 R12: ffff8880263ca000
R13: 00000000002d0001 R14: 0000000020001000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88802c900000(0063) knlGS:00000000f7f03b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020002004 CR3: 00000000206d3000 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
 pin_user_pages_remote+0xee/0x140 mm/gup.c:3291
 process_vm_rw_single_vec mm/process_vm_access.c:105 [inline]
 process_vm_rw_core.constprop.0+0x437/0x980 mm/process_vm_access.c:215
 process_vm_rw+0x29c/0x300 mm/process_vm_access.c:283
 __do_sys_process_vm_writev mm/process_vm_access.c:303 [inline]
 __se_sys_process_vm_writev mm/process_vm_access.c:298 [inline]
 __ia32_sys_process_vm_writev+0xe0/0x1b0 mm/process_vm_access.c:298
 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: 0023:0xf7f08579
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:00000000f7f035cc EFLAGS: 00000296 ORIG_RAX: 000000000000015c
RAX: ffffffffffffffda RBX: 00000000000000f8 RCX: 0000000020000340
RDX: 00000000000003a6 RSI: 0000000020000540 RDI: 00000000000002d7
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 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