vhci_hcd vhci_hcd.15: stop threads vhci_hcd vhci_hcd.15: release socket vhci_hcd vhci_hcd.15: disconnect device vhci_hcd vhci_hcd.15: stop threads vhci_hcd vhci_hcd.15: relea[ 23.071571][ T13] vhci_hcd vhci_hcd.15: release socket vhci_hcd vhci_hcd.15: disconnect device vhci_hcd vhci_hcd.15: stop threads vhci_hcd vhci_hcd.15: release socket vhci_hcd vhci_hcd.15: disconnect device vhci_hcd vhci_hcd.15: stop threads vhci_hcd vhci_hcd.15: release socket vhci_hcd vhci_hcd.15: disconnect device vhci_hcd vhci_hcd.15: stop threads vhci_hcd vhci_hcd.15: release socket vhci_hcd vhci_hcd.15: disconnect device vhci_hcd vhci_hcd.15: stop threads vhci_hcd vhci_hcd.15: release socket vhci_hcd vhci_hcd.15: disconnect device vhci_hcd vhci_hcd.15: stop threads vhci_hcd vhci_hcd.15: release socket vhci_hcd vhci_hcd.15: disconnect device vhci_hcd vhci_hcd.15: stop threads vhci_hcd vhci_hcd.15: release socket vhci_hcd vhci_hcd.15: disconnect device ================================================================== BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 Read of size 1 at addr ffff8881477add10 by task kworker/u8:1/13 CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: usbip_event event_handler Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:574 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x84/0x330 kernel/locking/lockdep.c:5842 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 rt_mutex_slowunlock+0xbf/0x8b0 kernel/locking/rtmutex.c:1417 spin_unlock_irqrestore include/linux/spinlock_rt.h:122 [inline] __wake_up_common_lock+0x18a/0x1e0 kernel/sched/wait.c:127 event_handler+0x3cb/0x4b0 drivers/usb/usbip/usbip_event.c:96 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340 worker_thread+0x89f/0xd90 kernel/workqueue.c:3421 kthread+0x726/0x8b0 kernel/kthread.c:463 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Allocated by task 1: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5657 [inline] __kmalloc_noprof+0x235/0x7c0 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] __usb_create_hcd+0x67/0x920 drivers/usb/core/hcd.c:2570 vhci_hcd_probe+0x104/0x3f0 drivers/usb/usbip/vhci_hcd.c:1378 platform_probe+0xf9/0x190 drivers/base/platform.c:1446 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0xac0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:801 driver_probe_device+0x4f/0x240 drivers/base/dd.c:831 __device_attach_driver+0x279/0x430 drivers/base/dd.c:959 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c8/0x450 drivers/base/dd.c:1031 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1086 bus_probe_device+0x12d/0x220 drivers/base/bus.c:574 device_add+0x7b6/0xb80 drivers/base/core.c:3689 platform_device_add+0x46a/0x800 drivers/base/platform.c:757 platform_device_register_full+0x46c/0x570 drivers/base/platform.c:885 vhci_hcd_init+0x1e9/0x390 drivers/usb/usbip/vhci_hcd.c:1557 do_one_initcall+0x250/0x840 init/main.c:1378 do_initcall_level+0x104/0x190 init/main.c:1440 do_initcalls+0x59/0xa0 init/main.c:1456 kernel_init_freeable+0x2a6/0x3d0 init/main.c:1688 kernel_init+0x1d/0x1d0 init/main.c:1578 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Freed by task 1: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6670 [inline] kfree+0x1bb/0x8f0 mm/slub.c:6878 vhci_hcd_probe+0x258/0x3f0 drivers/usb/usbip/vhci_hcd.c:1415 platform_probe+0xf9/0x190 drivers/base/platform.c:1446 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0xac0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:801 driver_probe_device+0x4f/0x240 drivers/base/dd.c:831 __device_attach_driver+0x279/0x430 drivers/base/dd.c:959 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c8/0x450 drivers/base/dd.c:1031 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1086 bus_probe_device+0x12d/0x220 drivers/base/bus.c:574 device_add+0x7b6/0xb80 drivers/base/core.c:3689 platform_device_add+0x46a/0x800 drivers/base/platform.c:757 platform_device_register_full+0x46c/0x570 drivers/base/platform.c:885 vhci_hcd_init+0x1e9/0x390 drivers/usb/usbip/vhci_hcd.c:1557 do_one_initcall+0x250/0x840 init/main.c:1378 do_initcall_level+0x104/0x190 init/main.c:1440 do_initcalls+0x59/0xa0 init/main.c:1456 kernel_init_freeable+0x2a6/0x3d0 init/main.c:1688 kernel_init+0x1d/0x1d0 init/main.c:1578 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 insert_work+0x3d/0x330 kernel/workqueue.c:2180 __queue_work+0xcfd/0xff0 kernel/workqueue.c:2335 queue_work_on+0x106/0x1c0 kernel/workqueue.c:2386 usb_rh_urb_dequeue drivers/usb/core/hcd.c:849 [inline] unlink1+0x34c/0x3f0 drivers/usb/core/hcd.c:1584 usb_hcd_unlink_urb+0xda/0x1d0 drivers/usb/core/hcd.c:1621 usb_kill_urb+0x10b/0x2f0 drivers/usb/core/urb.c:717 hub_quiesce+0x210/0x320 drivers/usb/core/hub.c:1412 hub_suspend+0x7e8/0x9b0 drivers/usb/core/hub.c:4008 usb_suspend_interface drivers/usb/core/driver.c:1323 [inline] usb_suspend_both+0x31f/0x1310 drivers/usb/core/driver.c:1445 usb_runtime_suspend+0x58/0x110 drivers/usb/core/driver.c:1997 __rpm_callback+0x2be/0x7a0 drivers/base/power/runtime.c:406 rpm_callback drivers/base/power/runtime.c:460 [inline] rpm_suspend+0x87d/0x16e0 drivers/base/power/runtime.c:698 __pm_runtime_suspend+0x12c/0x1a0 drivers/base/power/runtime.c:1167 pm_runtime_autosuspend include/linux/pm_runtime.h:415 [inline] usb_runtime_idle+0x76/0x90 drivers/usb/core/driver.c:2034 rpm_idle+0x383/0x8d0 drivers/base/power/runtime.c:550 pm_runtime_work+0x11e/0x1b0 drivers/base/power/runtime.c:995 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340 worker_thread+0x89f/0xd90 kernel/workqueue.c:3421 kthread+0x726/0x8b0 kernel/kthread.c:463 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Second to last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 insert_work+0x3d/0x330 kernel/workqueue.c:2180 __queue_work+0xcfd/0xff0 kernel/workqueue.c:2335 queue_work_on+0x106/0x1c0 kernel/workqueue.c:2386 rh_call_control drivers/usb/core/hcd.c:711 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:821 [inline] usb_hcd_submit_urb+0x11db/0x1b50 drivers/usb/core/hcd.c:1542 usb_start_wait_urb+0x12b/0x510 drivers/usb/core/message.c:59 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x232/0x3e0 drivers/usb/core/message.c:154 get_port_status drivers/usb/core/hub.c:607 [inline] hub_ext_port_status+0x116/0x820 drivers/usb/core/hub.c:624 usb_hub_port_status drivers/usb/core/hub.c:674 [inline] hub_activate+0x6eb/0x1a80 drivers/usb/core/hub.c:1185 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340 worker_thread+0x89f/0xd90 kernel/workqueue.c:3421 kthread+0x726/0x8b0 kernel/kthread.c:463 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 The buggy address belongs to the object at ffff8881477ac000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 7440 bytes inside of freed 8192-byte region [ffff8881477ac000, ffff8881477ae000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1477a8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x500000000000040(head|node=1|zone=2) page_type: f5(slab) raw: 0500000000000040 ffff88813fe27280 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 0500000000000040 ffff88813fe27280 dead000000000122 0000000000000000 head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 0500000000000003 ffffea00051dea01 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 22636347125, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884 prep_new_page mm/page_alloc.c:1892 [inline] get_page_from_freelist+0x28bb/0x2950 mm/page_alloc.c:3945 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2486 alloc_slab_page mm/slub.c:3075 [inline] allocate_slab+0x86/0x3a0 mm/slub.c:3248 new_slab mm/slub.c:3302 [inline] ___slab_alloc+0xaf8/0x13d0 mm/slub.c:4656 __slab_alloc+0xc5/0x1f0 mm/slub.c:4779 __slab_alloc_node mm/slub.c:4855 [inline] slab_alloc_node mm/slub.c:5251 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_noprof+0x15e/0x7c0 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] __usb_create_hcd+0x67/0x920 drivers/usb/core/hcd.c:2570 vhci_hcd_probe+0x1e6/0x3f0 drivers/usb/usbip/vhci_hcd.c:1394 platform_probe+0xf9/0x190 drivers/base/platform.c:1446 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0xac0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:801 driver_probe_device+0x4f/0x240 drivers/base/dd.c:831 __device_attach_driver+0x279/0x430 drivers/base/dd.c:959 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500 page_owner free stack trace missing Memory state around the buggy address: ffff8881477adc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881477adc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881477add00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881477add80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881477ade00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================