scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
sd 0:0:1:0: Attached scsi generic sg0 type 0
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_h[ 17.928771][ T1026] 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 event_handler+0x25c/0x4b0 drivers/usb/usbip/usbip_event.c:90
Read of size 8 at addr ffff88802baf9cf0 by task kworker/u8:10/1026
CPU: 1 UID: 0 PID: 1026 Comm: kworker/u8:10 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: usbip_event event_handler
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_address_description+0x55/0x1e0 mm/kasan/report.c:378
print_report+0x58/0x70 mm/kasan/report.c:482
kasan_report+0x117/0x150 mm/kasan/report.c:595
event_handler+0x25c/0x4b0 drivers/usb/usbip/usbip_event.c:90
process_one_work kernel/workqueue.c:3302 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
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:5295 [inline]
__kmalloc_noprof+0x3e7/0x7b0 mm/slub.c:5307
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
__usb_create_hcd+0x67/0x920 drivers/usb/core/hcd.c:2566
vhci_hcd_probe+0x104/0x3f0 drivers/usb/usbip/vhci_hcd.c:1378
platform_probe+0xf9/0x190 drivers/base/platform.c:1418
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x267/0xaf0 drivers/base/dd.c:709
__driver_probe_device+0x1ef/0x380 drivers/base/dd.c:871
driver_probe_device+0x4f/0x240 drivers/base/dd.c:901
__device_attach_driver+0x279/0x430 drivers/base/dd.c:1029
bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
__device_attach+0x2c8/0x450 drivers/base/dd.c:1101
device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1156
bus_probe_device+0x12d/0x220 drivers/base/bus.c:613
device_add+0x7e9/0xbb0 drivers/base/core.c:3706
platform_device_add+0x46a/0x800 drivers/base/platform.c:756
platform_device_register_full+0x548/0x640 drivers/base/platform.c:888
vhci_hcd_init+0x220/0x360 drivers/usb/usbip/vhci_hcd.c:1557
do_one_initcall+0x250/0x870 init/main.c:1392
do_initcall_level+0x104/0x190 init/main.c:1454
do_initcalls+0x59/0xa0 init/main.c:1470
kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
kernel_init+0x1d/0x1d0 init/main.c:1593
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
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:2689 [inline]
slab_free mm/slub.c:6246 [inline]
kfree+0x1c5/0x6c0 mm/slub.c:6561
vhci_hcd_probe+0x258/0x3f0 drivers/usb/usbip/vhci_hcd.c:1415
platform_probe+0xf9/0x190 drivers/base/platform.c:1418
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x267/0xaf0 drivers/base/dd.c:709
__driver_probe_device+0x1ef/0x380 drivers/base/dd.c:871
driver_probe_device+0x4f/0x240 drivers/base/dd.c:901
__device_attach_driver+0x279/0x430 drivers/base/dd.c:1029
bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
__device_attach+0x2c8/0x450 drivers/base/dd.c:1101
device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1156
bus_probe_device+0x12d/0x220 drivers/base/bus.c:613
device_add+0x7e9/0xbb0 drivers/base/core.c:3706
platform_device_add+0x46a/0x800 drivers/base/platform.c:756
platform_device_register_full+0x548/0x640 drivers/base/platform.c:888
vhci_hcd_init+0x220/0x360 drivers/usb/usbip/vhci_hcd.c:1557
do_one_initcall+0x250/0x870 init/main.c:1392
do_initcall_level+0x104/0x190 init/main.c:1454
do_initcalls+0x59/0xa0 init/main.c:1470
kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
kernel_init+0x1d/0x1d0 init/main.c:1593
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
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:2226
__queue_work+0xcfd/0x1010 kernel/workqueue.c:2381
queue_work_on+0x106/0x1d0 kernel/workqueue.c:2432
usb_rh_urb_dequeue drivers/usb/core/hcd.c:845 [inline]
unlink1+0x34c/0x3f0 drivers/usb/core/hcd.c:1580
usb_hcd_unlink_urb+0xda/0x1d0 drivers/usb/core/hcd.c:1617
usb_kill_urb+0x10b/0x2f0 drivers/usb/core/urb.c:716
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+0x28d/0x1070 drivers/usb/core/driver.c:1446
usb_runtime_suspend+0x58/0x110 drivers/usb/core/driver.c:2000
__rpm_callback+0x2ba/0x920 drivers/base/power/runtime.c:406
rpm_callback drivers/base/power/runtime.c:460 [inline]
rpm_suspend+0x87d/0x1700 drivers/base/power/runtime.c:698
__pm_runtime_suspend+0x12c/0x1a0 drivers/base/power/runtime.c:1167
pm_runtime_put_sync_autosuspend include/linux/pm_runtime.h:740 [inline]
usb_new_device+0xb36/0x16e0 drivers/usb/core/hub.c:2727
register_root_hub+0x270/0x5f0 drivers/usb/core/hcd.c:990
usb_add_hcd+0xba1/0x10b0 drivers/usb/core/hcd.c:2987
vhci_hcd_probe+0x141/0x3f0 drivers/usb/usbip/vhci_hcd.c:1388
platform_probe+0xf9/0x190 drivers/base/platform.c:1418
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x267/0xaf0 drivers/base/dd.c:709
__driver_probe_device+0x1ef/0x380 drivers/base/dd.c:871
driver_probe_device+0x4f/0x240 drivers/base/dd.c:901
__device_attach_driver+0x279/0x430 drivers/base/dd.c:1029
bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
__device_attach+0x2c8/0x450 drivers/base/dd.c:1101
device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1156
bus_probe_device+0x12d/0x220 drivers/base/bus.c:613
device_add+0x7e9/0xbb0 drivers/base/core.c:3706
platform_device_add+0x46a/0x800 drivers/base/platform.c:756
platform_device_register_full+0x548/0x640 drivers/base/platform.c:888
vhci_hcd_init+0x220/0x360 drivers/usb/usbip/vhci_hcd.c:1557
do_one_initcall+0x250/0x870 init/main.c:1392
do_initcall_level+0x104/0x190 init/main.c:1454
do_initcalls+0x59/0xa0 init/main.c:1470
kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
kernel_init+0x1d/0x1d0 init/main.c:1593
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
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:2226
__queue_work+0xcfd/0x1010 kernel/workqueue.c:2381
queue_work_on+0x106/0x1d0 kernel/workqueue.c:2432
rh_call_control drivers/usb/core/hcd.c:707 [inline]
rh_urb_enqueue drivers/usb/core/hcd.c:817 [inline]
usb_hcd_submit_urb+0x11db/0x1b50 drivers/usb/core/hcd.c:1538
usb_start_wait_urb+0x13f/0x5b0 drivers/usb/core/message.c:62
usb_internal_control_msg drivers/usb/core/message.c:117 [inline]
usb_control_msg+0x234/0x3e0 drivers/usb/core/message.c:167
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:3302 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff88802baf8000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 7408 bytes inside of
freed 8192-byte region [ffff88802baf8000, ffff88802bafa000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2baf8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88801a022280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88801a022280 dead000000000122 0000000000000000
head: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000
head: 0080000000000003 fffffffffffffe01 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 17656645730, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1858
prep_new_page mm/page_alloc.c:1866 [inline]
get_page_from_freelist+0x27c8/0x2840 mm/page_alloc.c:3946
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226
alloc_slab_page mm/slub.c:3278 [inline]
allocate_slab+0x77/0x660 mm/slub.c:3467
new_slab mm/slub.c:3525 [inline]
refill_objects+0x33c/0x3d0 mm/slub.c:7251
refill_sheaf mm/slub.c:2816 [inline]
__pcs_replace_empty_main+0x373/0x720 mm/slub.c:4651
alloc_from_pcs mm/slub.c:4749 [inline]
slab_alloc_node mm/slub.c:4883 [inline]
__do_kmalloc_node mm/slub.c:5294 [inline]
__kmalloc_noprof+0x530/0x7b0 mm/slub.c:5307
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
__usb_create_hcd+0x67/0x920 drivers/usb/core/hcd.c:2566
vhci_hcd_probe+0x1e6/0x3f0 drivers/usb/usbip/vhci_hcd.c:1394
platform_probe+0xf9/0x190 drivers/base/platform.c:1418
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x267/0xaf0 drivers/base/dd.c:709
__driver_probe_device+0x1ef/0x380 drivers/base/dd.c:871
driver_probe_device+0x4f/0x240 drivers/base/dd.c:901
__device_attach_driver+0x279/0x430 drivers/base/dd.c:1029
bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
__device_attach+0x2c8/0x450 drivers/base/dd.c:1101
page_owner free stack trace missing
Memory state around the buggy address:
ffff88802baf9b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802baf9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802baf9c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802baf9d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802baf9d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================