flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff raw: ffffea0007220a60 ffffea000723c3a0 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: 0 PID: 3151 Comm: syzkaller741984 Not tainted 4.15.0-rc5+ #147 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:ffff8801c89cf388 EFLAGS: 00010203 RAX: 0000000000000000 RBX: 1ffff10039139e73 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffff10039139dbd RDI: ffffed0039139e60 RBP: ffff8801c89cf460 R08: 1ffff10039139d7f R09: 0000000000000000 R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039139e77 R13: dffffc0000000000 R14: ffff8801c89cf6b8 R15: ffffea000723bbc0 FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000f7fefb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000208be000 CR3: 00000001c9d22005 CR4: 00000000001606f0 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 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:125 RIP: 0023:0xf7ff3c79 RSP: 002b:00000000f7fef11c EFLAGS: 00000296 ORIG_RAX: 00000000000000c0 RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000082 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 3b bf a4 fd 48 c7 c6 c0 c0 70 85 4c 89 ff e8 2c a3 cd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 17 bf a4 fd RIP: get_page include/linux/mm.h:844 [inline] RSP: ffff8801c89cf388 RIP: mon_bin_vma_fault+0x2f4/0x400 drivers/usb/mon/mon_bin.c:1239 RSP: ffff8801c89cf388 ---[ end trace f44d3b31ffc4d00d ]---