usb usb9: usbfs: process 10640 (syz-executor.0) did not claim interface 0 before use vhci_hcd vhci_hcd.0: Device attached ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:377 [inline] BUG: KASAN: slab-out-of-bounds in usb_hcd_poll_rh_status+0x387/0x6f0 drivers/usb/core/hcd.c:771 Write of size 2 at addr ffff8880b38c3940 by task syz-executor.3/10643 CPU: 1 PID: 10643 Comm: syz-executor.3 Not tainted 4.19.192-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report+0x8f/0xa0 mm/kasan/report.c:412 memcpy+0x35/0x50 mm/kasan/kasan.c:303 memcpy include/linux/string.h:377 [inline] usb_hcd_poll_rh_status+0x387/0x6f0 drivers/usb/core/hcd.c:771 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:535 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:deref_stack_reg+0xe/0x1d0 arch/x86/kernel/unwind_orc.c:330 Code: ff ff ff 4c 89 ef e8 c1 c1 6e 00 0f b6 44 24 04 eb a0 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 56 41 55 <49> 89 d5 41 54 49 89 fc 55 48 89 f5 53 48 83 ec 68 48 c7 44 24 08 RSP: 0018:ffff888040f7f690 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff110081efede RCX: ffffffff8b8fabcf RDX: ffff888040f7f8d0 RSI: ffff888040f7f910 RDI: ffff888040f7f890 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: ffff888040f7f8ef R11: 0000000000074071 R12: ffff888040f7f920 R13: ffff888040f7f8c5 R14: ffff888040f7f890 R15: ffffffff8b8fabca unwind_next_frame+0xf83/0x1400 arch/x86/kernel/unwind_orc.c:555 __unwind_start+0x5b8/0x960 arch/x86/kernel/unwind_orc.c:667 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x72/0x190 arch/x86/kernel/stacktrace.c:43 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc+0x110/0x370 mm/slab.c:3557 alloc_inode+0xab/0x180 fs/inode.c:213 new_inode_pseudo fs/inode.c:911 [inline] new_inode+0x1d/0xf0 fs/inode.c:940 debugfs_get_inode+0x1a/0x130 fs/debugfs/inode.c:37 __debugfs_create_file+0xb2/0x480 fs/debugfs/inode.c:357 kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:650 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3450 [inline] kvm_dev_ioctl+0xa2b/0x16e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3477 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd664ce9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff4e99d47f R14: 00007fd664ce9300 R15: 0000000000022000 Allocated by task 10640: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] proc_do_submiturb+0x2d08/0x3af0 drivers/usb/core/devio.c:1668 proc_submiturb drivers/usb/core/devio.c:1822 [inline] usbdev_do_ioctl+0x773/0x3030 drivers/usb/core/devio.c:2476 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9946: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 kvfree+0x59/0x60 mm/util.c:452 kvm_arch_free_memslot+0x1ae/0x2c0 arch/x86/kvm/x86.c:9201 kvm_free_memslot arch/x86/kvm/../../../virt/kvm/kvm_main.c:589 [inline] kvm_free_memslots+0xb8/0x160 arch/x86/kvm/../../../virt/kvm/kvm_main.c:602 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:813 [inline] kvm_put_kvm+0x7a2/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:831 kvm_vcpu_release+0x77/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2639 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880b38c3940 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880b38c3940, ffff8880b38c3960) The buggy address belongs to the page: page:ffffea0002ce30c0 count:1 mapcount:0 mapping:ffff88813bff01c0 index:0xffff8880b38c3fc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea00027d4408 ffffea0002a7fb48 ffff88813bff01c0 raw: ffff8880b38c3fc1 ffff8880b38c3000 0000000100000038 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880b38c3800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880b38c3880: 00 00 00 00 fc fc fc fc 07 fc fc fc fc fc fc fc >ffff8880b38c3900: fb fb fb fb fc fc fc fc 01 fc fc fc fc fc fc fc ^ ffff8880b38c3980: 00 00 00 fc fc fc fc fc 00 00 fc fc fc fc fc fc ffff8880b38c3a00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================