Message-ID: <001a113f890e0c529e056159d47b@google.com>
Date:   Wed, 27 Dec 2017 14:22:01 -0800
From:   syzbot <syzbot+f9831b881b3e849829fc@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, alexander.deucher@....com,
        chris@...is-wilson.co.uk, dave.jiang@...el.com,
        davem@...emloft.net, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        mchehab@...nel.org, mingo@...nel.org,
        syzkaller-bugs@...glegroups.com
Subject: kernel BUG at ./include/linux/mm.h:LINE! (3)

Hello,

syzkaller hit the following crash on  
37759fa6d0fa9e4d6036d19ac12f555bfc0aeafd
git://git.cmpxchg.org/linux-mmots.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
C reproducer is attached
syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers


IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: <syzbot+f9831b881b3e849829fc@...kaller.appspotmail.com>
It will help syzbot understand when the bug is fixed. See footer for  
details.
If you forward the report, please keep this part and the footer.

------------[ 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: 3152 Comm: syzkaller757651 Not tainted 4.15.0-rc4-mm1+ #49
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:ffff8801cb0af510 EFLAGS: 00010203
RAX: 0000000000000000 RBX: 1ffff10039615ea4 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 1ffff10039615dee RDI: ffffed0039615e90
RBP: ffff8801cb0af5e8 R08: 1ffff10039615db0 R09: 0000000000000000
R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039615ea8
R13: dffffc0000000000 R14: ffff8801cb0af840 R15: ffffea000723fc00
FS:  00007f49b1386700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cfb39ce0b8 CR3: 00000001ccb19003 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
  __do_fault+0xeb/0x30f mm/memory.c:3206
  do_read_fault mm/memory.c:3616 [inline]
  do_fault mm/memory.c:3716 [inline]
  handle_pte_fault mm/memory.c:3947 [inline]
  __handle_mm_fault+0x1d8f/0x3ce0 mm/memory.c:4071
  handle_mm_fault+0x38f/0x930 mm/memory.c:4108
  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:1200
  __mm_populate+0x23a/0x450 mm/gup.c:1250
  mm_populate include/linux/mm.h:2233 [inline]
  vm_mmap_pgoff+0x241/0x280 mm/util.c:338
  SYSC_mmap_pgoff mm/mmap.c:1544 [inline]
  SyS_mmap_pgoff+0x462/0x5f0 mm/mmap.c:1502
  SYSC_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
  SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:91
  entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x449249
RSP: 002b:00007f49b1385d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449249
RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000
RBP: 0000000000000000 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20
R13: 6273752f7665642f R14: 00007f49b13869c0 R15: 0000000000000005
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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89  
95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd
RIP: get_page include/linux/mm.h:844 [inline] RSP: ffff8801cb0af510
RIP: mon_bin_vma_fault+0x2f4/0x400 drivers/usb/mon/mon_bin.c:1239 RSP:  
ffff8801cb0af510
---[ end trace 8ea221790b36af86 ]---


---
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