usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb4: Product: Dummy host controller
usb usb4: Manufacturer: Linux 6.6.0-rc5-next-20231009-syzkaller dummy_hcd
usb usb4: SerialNumber: dummy_hcd.3
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 1 port detected
dummy_hcd dummy_hcd.4: USB Host+Gadget Emulator, driver 02 May 2005
dummy_hcd dummy_hcd.4: Dummy host controller
dummy_hcd dummy_hcd.4: new USB bus registered, assigned bus number 5
usb usb5: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.06
usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb5: Product: Dummy host controller
usb usb5: Manufacturer: Linux 6.6.0-rc5-next-20231009-syzkaller dummy_hcd
usb usb5: SerialNumber: dummy_hcd.4
hub 5-0:1.0: USB hub found
hub 5-0:1.0: 1 port detected
dummy_hcd dummy_hcd.5: USB Host+Gadget Emulator, driver 02 May 2005
dummy_hcd dummy_hcd.5: Dummy host controller
dummy_hcd dummy_hcd.5: new USB bus registered, assigned bus number 6
usb usb6: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.06
usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb6: Product: Dummy host controller
usb usb6: Manufacturer: Linux 6.6.0-rc5-next-20231009-syzkaller dummy_hcd
usb usb6: SerialNumber: dummy_hcd.5
hub 6-0:1.0: USB hub found
hub 6-0:1.0: 1 port detected
dummy_hcd dummy_hcd.6: USB Host+Gadget Emulator, driver 02 May 2005
dummy_hcd dummy_hcd.6: Dummy host controller
dummy_hcd dummy_hcd.6: new USB bus registered, assigned bus number 7
usb usb7: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.06
usb usb7: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb7: Product: Dummy host controller
usb usb7: Manufacturer: Linux 6.6.0-rc5-next-20231009-syzkaller dummy_hcd
usb usb7: SerialNumber: dummy_hcd.6
hub 7-0:1.0: USB hub found
hub 7-0:1.0: 1 port detected
dummy_hcd dummy_hcd.7: USB Host+Gadget Emulator, driver 02 May 2005
dummy_hcd dummy_hcd.7: Dummy host controller
dummy_hcd dummy_hcd.7: new USB bus registered, assigned bus number 8
usb usb8: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.06
usb usb8: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb8: Product: Dummy host controller
usb usb8: Manufacturer: Linux 6.6.0-rc5-next-20231009-syzkaller dummy_hcd
usb usb8: SerialNumber: dummy_hcd.7
hub 8-0:1.0: USB hub found
hub 8-0:1.0: 1 port detected
gadgetfs: USB Gadget filesystem, version 24 Aug 2004
vhci_hcd vhci_hcd.0: USB/IP Virtual Host Controller
vhci_hcd vhci_hcd.0: new USB bus registered, assigned bus number 9
==================================================================
BUG: KASAN: slab-out-of-bounds in vhci_setup+0x2d3/0x340 drivers/usb/usbip/vhci_hcd.c:1145
Write of size 8 at addr ffff88802006b0e8 by task swapper/0/1

CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.6.0-rc5-next-20231009-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 vhci_setup+0x2d3/0x340 drivers/usb/usbip/vhci_hcd.c:1145
 usb_add_hcd+0x5bc/0x1770 drivers/usb/core/hcd.c:2911
 vhci_hcd_probe+0x12c/0x460 drivers/usb/usbip/vhci_hcd.c:1363
 platform_probe+0xff/0x1e0 drivers/base/platform.c:1404
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x234/0xc90 drivers/base/dd.c:658
 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830
 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:958
 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x117e/0x1aa0 drivers/base/core.c:3625
 platform_device_add+0x316/0x810 drivers/base/platform.c:716
 platform_device_register_full+0x3ec/0x550 drivers/base/platform.c:844
 vhci_hcd_init+0x1ad/0x360 drivers/usb/usbip/vhci_hcd.c:1532
 do_one_initcall+0x11c/0x640 init/main.c:1232
 do_initcall_level init/main.c:1294 [inline]
 do_initcalls init/main.c:1310 [inline]
 do_basic_setup init/main.c:1329 [inline]
 kernel_init_freeable+0x5c2/0x900 init/main.c:1547
 kernel_init+0x1c/0x2a0 init/main.c:1437
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:291
 </TASK>

Allocated by task 1:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slab_common.c:1004 [inline]
 __kmalloc_node_track_caller+0x61/0x100 mm/slab_common.c:1024
 kstrdup+0x3c/0x70 mm/util.c:62
 kstrdup_const+0x5f/0x70 mm/util.c:85
 __kernfs_new_node+0x9c/0x890 fs/kernfs/dir.c:611
 kernfs_new_node fs/kernfs/dir.c:679 [inline]
 kernfs_create_dir_ns+0x9a/0x210 fs/kernfs/dir.c:1040
 sysfs_create_dir_ns+0x13b/0x2a0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x2c8/0x960 lib/kobject.c:238
 kobject_add_varg lib/kobject.c:372 [inline]
 kobject_add+0x16f/0x240 lib/kobject.c:424
 device_add+0x289/0x1aa0 drivers/base/core.c:3563
 device_create_groups_vargs+0x1f4/0x270 drivers/base/core.c:4312
 device_create+0xe9/0x120 drivers/base/core.c:4351
 mon_bin_add+0xba/0x160 drivers/usb/mon/mon_bin.c:1366
 mon_bus_init+0x18e/0x320 drivers/usb/mon/mon_main.c:291
 mon_bus_add drivers/usb/mon/mon_main.c:188 [inline]
 mon_notify+0x32e/0x490 drivers/usb/mon/mon_main.c:219
 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93
 blocking_notifier_call_chain kernel/notifier.c:388 [inline]
 blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:376
 usb_register_bus drivers/usb/core/hcd.c:910 [inline]
 usb_add_hcd+0x34d/0x1770 drivers/usb/core/hcd.c:2852
 vhci_hcd_probe+0x12c/0x460 drivers/usb/usbip/vhci_hcd.c:1363
 platform_probe+0xff/0x1e0 drivers/base/platform.c:1404
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x234/0xc90 drivers/base/dd.c:658
 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830
 __device_attach_driver+0x1d4/0x300 drivers/base/dd.c:958
 bus_for_each_drv+0x157/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x117e/0x1aa0 drivers/base/core.c:3625
 platform_device_add+0x316/0x810 drivers/base/platform.c:716
 platform_device_register_full+0x3ec/0x550 drivers/base/platform.c:844
 vhci_hcd_init+0x1ad/0x360 drivers/usb/usbip/vhci_hcd.c:1532
 do_one_initcall+0x11c/0x640 init/main.c:1232
 do_initcall_level init/main.c:1294 [inline]
 do_initcalls init/main.c:1310 [inline]
 do_basic_setup init/main.c:1329 [inline]
 kernel_init_freeable+0x5c2/0x900 init/main.c:1547
 kernel_init+0x1c/0x2a0 init/main.c:1437
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:291

The buggy address belongs to the object at ffff88802006b0c8
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 24 bytes to the right of
 allocated 8-byte region [ffff88802006b0c8, ffff88802006b0d0)

The buggy address belongs to the physical page:
page:ffffea0000801ac0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2006b
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff888012c41280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12c00(GFP_NOIO|__GFP_NOWARN|__GFP_NORETRY), pid 780, tgid 780 (kworker/0:2), ts 18554331367, free_ts 18537167635
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1540
 prep_new_page mm/page_alloc.c:1547 [inline]
 get_page_from_freelist+0x98f/0x32a0 mm/page_alloc.c:3339
 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4595
 alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2153
 alloc_slab_page mm/slub.c:1870 [inline]
 allocate_slab+0x251/0x380 mm/slub.c:2017
 new_slab mm/slub.c:2070 [inline]
 ___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
 __slab_alloc_node mm/slub.c:3375 [inline]
 slab_alloc_node mm/slub.c:3468 [inline]
 __kmem_cache_alloc_node+0x131/0x310 mm/slub.c:3517
 kmalloc_trace+0x25/0xe0 mm/slab_common.c:1095
 kmalloc include/linux/slab.h:600 [inline]
 usb_control_msg+0xbd/0x4a0 drivers/usb/core/message.c:144
 get_port_status drivers/usb/core/hub.c:592 [inline]
 hub_ext_port_status+0x14e/0x670 drivers/usb/core/hub.c:609
 usb_hub_port_status drivers/usb/core/hub.c:654 [inline]
 hub_activate+0x6e3/0x1bf0 drivers/usb/core/hub.c:1164
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2389
 free_unref_page_list+0xe6/0xb30 mm/page_alloc.c:2570
 release_pages+0x32a/0x14e0 mm/swap.c:1042
 tlb_batch_pages_flush+0x9a/0x190 mm/mmu_gather.c:98
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu mm/mmu_gather.c:300 [inline]
 tlb_finish_mmu+0x14b/0x6f0 mm/mmu_gather.c:392
 exit_mmap+0x38b/0xa60 mm/mmap.c:3240
 __mmput+0x12a/0x4d0 kernel/fork.c:1349
 mmput+0x62/0x70 kernel/fork.c:1371
 free_bprm+0x144/0x3f0 fs/exec.c:1490
 kernel_execve+0x3e7/0x4e0 fs/exec.c:2024
 call_usermodehelper_exec_async+0x256/0x4c0 kernel/umh.c:110
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:291

Memory state around the buggy address:
 ffff88802006af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88802006b000: fa fc fc fc fc 06 fc fc fc fc 06 fc fc fc fc 07
>ffff88802006b080: fc fc fc fc 00 fc fc fc fc 00 fc fc fc fc 00 fc
                                                          ^
 ffff88802006b100: fc fc fc 06 fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802006b180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================