page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0)
------------[ cut here ]------------
kernel BUG at ./include/linux/mm.h:844!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 13418 Comm: syz-executor2 Not tainted 4.15.0-rc7+ #169
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_page include/linux/mm.h:844 [inline]
RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 drivers/usb/mon/mon_bin.c:1239
RSP: 0018:ffff8801cf43f388 EFLAGS: 00010203
RAX: 0000000000000000 RBX: 1ffff10039e87e73 RCX: 0000000000000000
RDX: 000000000000d622 RSI: ffffc90003c10000 RDI: ffffed0039e87e60
RBP: ffff8801cf43f460 R08: 1ffff10039e87d7f R09: 0000000000000000
R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039e87e77
R13: dffffc0000000000 R14: ffff8801cf43f6b8 R15: ffffea0007089900
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f77e1b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f76efdb0 CR3: 00000001c1053004 CR4: 00000000001606e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __do_fault+0xeb/0x30f mm/memory.c:3196
 do_read_fault mm/memory.c:3606 [inline]
 do_fault mm/memory.c:3706 [inline]
 handle_pte_fault mm/memory.c:3937 [inline]
 __handle_mm_fault+0x1d8f/0x3ce0 mm/memory.c:4061
 handle_mm_fault+0x334/0x8d0 mm/memory.c:4098
 faultin_page mm/gup.c:502 [inline]
 __get_user_pages+0x50c/0x15f0 mm/gup.c:699
 populate_vma_page_range+0x20e/0x2f0 mm/gup.c:1216
 __mm_populate+0x23a/0x450 mm/gup.c:1266
 mm_populate include/linux/mm.h:2226 [inline]
 vm_mmap_pgoff+0x241/0x280 mm/util.c:338
 SYSC_mmap_pgoff mm/mmap.c:1533 [inline]
 SyS_mmap_pgoff+0x462/0x5f0 mm/mmap.c:1491
 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
 do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
 entry_SYSENTER_compat+0x54/0x63 arch/x86/entry/entry_64_compat.S:129
RIP: 0023:0xf7fe5c79
RSP: 002b:00000000f77e108c EFLAGS: 00000296 ORIG_RAX: 00000000000000c0
RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000
RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000014
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 00 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 41 bc 02 00 00 00 eb bb e8 2b 85 94 fd 48 c7 c6 a0 b2 12 86 4c 89 ff e8 7c 84 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 07 85 94 fd 
RIP: get_page include/linux/mm.h:844 [inline] RSP: ffff8801cf43f388
RIP: mon_bin_vma_fault+0x2f4/0x400 drivers/usb/mon/mon_bin.c:1239 RSP: ffff8801cf43f388
---[ end trace 541a9c7687b11ad6 ]---