m920x_read = error: -19
dvb-usb: error while querying for an remote control event.
==================================================================
BUG: KASAN: use-after-free in __list_add_valid_or_report+0x151/0x190 lib/list_debug.c:32
Read of size 8 at addr ffff888128ff4250 by task kworker/1:11/21633

CPU: 1 UID: 0 PID: 21633 Comm: kworker/1:11 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events request_module_async
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 __list_add_valid_or_report+0x151/0x190 lib/list_debug.c:32
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add_tail include/linux/list.h:191 [inline]
 em28xx_init_extension+0x48/0x200 drivers/media/usb/em28xx/em28xx-core.c:1114
 request_module_async+0x61/0x70 drivers/media/usb/em28xx/em28xx-cards.c:3457
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x56d/0x700 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888128ff7c00 pfn:0x128ff4
flags: 0x200000000000000(node=0|zone=2)
page_type: f0(buddy)
raw: 0200000000000000 ffffea0004aa9408 ffffea0005395408 0000000000000000
raw: ffff888128ff7c00 0000000000000002 00000000f0000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x40cc0(GFP_KERNEL|__GFP_COMP), pid 20382, tgid 20382 (kworker/1:9), ts 1770431240682, free_ts 1771270696860
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x1003/0x2dc0 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x259/0x21f0 mm/page_alloc.c:5183
 alloc_pages_mpol+0xe4/0x410 mm/mempolicy.c:2416
 ___kmalloc_large_node+0xed/0x160 mm/slub.c:5583
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:5614
 __do_kmalloc_node mm/slub.c:5630 [inline]
 __kmalloc_noprof.cold+0xc/0x62 mm/slub.c:5654
 kmalloc_noprof include/linux/slab.h:961 [inline]
 hcd_buffer_alloc+0x1f5/0x290 drivers/usb/core/buffer.c:134
 usb_alloc_coherent+0x5f/0xa0 drivers/usb/core/usb.c:1010
 hid_alloc_buffers drivers/hid/usbhid/hid-core.c:857 [inline]
 usbhid_start+0x5e9/0x23b0 drivers/hid/usbhid/hid-core.c:1091
 hid_hw_start+0x65/0x140 drivers/hid/hid-core.c:2374
 steam_probe+0x663/0x1050 drivers/hid/hid-steam.c:1253
 __hid_device_probe drivers/hid/hid-core.c:2775 [inline]
 hid_device_probe+0x5ba/0x8d0 drivers/hid/hid-core.c:2812
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
page last free pid 20382 tgid 20382 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0x78f/0x1000 mm/page_alloc.c:2906
 hcd_buffer_free+0x1b9/0x250 drivers/usb/core/buffer.c:163
 usb_free_coherent+0x69/0x80 drivers/usb/core/usb.c:1032
 hid_free_buffers.isra.0+0x97/0x280 drivers/hid/usbhid/hid-core.c:975
 usbhid_stop+0x531/0x710 drivers/hid/usbhid/hid-core.c:1256
 steam_remove+0x191/0x220 drivers/hid/hid-steam.c:1333
 hid_device_remove+0xd1/0x260 drivers/hid/hid-core.c:2831
 device_remove+0xcb/0x170 drivers/base/dd.c:569
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1297
 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579
 device_del+0x396/0x9f0 drivers/base/core.c:3878
 hid_remove_device drivers/hid/hid-core.c:3008 [inline]
 hid_destroy_device+0x19c/0x240 drivers/hid/hid-core.c:3030
 usbhid_disconnect+0xa0/0xe0 drivers/hid/usbhid/hid-core.c:1462
 usb_unbind_interface+0x1dd/0x9e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 device_remove+0x125/0x170 drivers/base/dd.c:563
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1297

Memory state around the buggy address:
 ffff888128ff4100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888128ff4180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888128ff4200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                 ^
 ffff888128ff4280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888128ff4300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================