raw: ffffea000701a560 ffffea0007026f60 0000000000000000 0000000000000000 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: 3472 Comm: syzkaller927827 Not tainted 4.15.0-rc7+ #253 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:ffff8801c0047510 EFLAGS: 00010203 RAX: 0000000000000000 RBX: 1ffff10038008ea4 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffff10038008dee RDI: ffffed0038008e90 RBP: ffff8801c00475e8 R08: 1ffff10038008db0 R09: 0000000000000000 R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038008ea8 R13: dffffc0000000000 R14: ffff8801c0047840 R15: ffffea000701e880 FS: 00007fe4f3a96700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000203a5000 CR3: 00000001c02b8003 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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 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+0x23/0x9a RIP: 0033:0x449b99 RSP: 002b:00007fe4f3a95d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000449b99 RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 RBP: 00000000006dbc20 R08: 0000000000000019 R09: 0000000000000000 R10: 0000000000008011 R11: 0000000000000212 R12: 78756e696c65732f R13: 7361682f6376612f R14: 6273752f7665642f R15: 000000000000000b 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 bb 9d 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 cc 8a bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 97 9d 94 fd RIP: get_page include/linux/mm.h:844 [inline] RSP: ffff8801c0047510 RIP: mon_bin_vma_fault+0x2f4/0x400 drivers/usb/mon/mon_bin.c:1239 RSP: ffff8801c0047510 ---[ end trace e112437d1b8de5dc ]---