[drm] Initialized udl 0.0.1 20120220 for 3-1:0.0 on minor 2
[drm] Initialized udl on minor 2
[drm:udl_get_edid_block] *ERROR* Read EDID byte 0 failed err ffffffb9
udl 3-1:0.0: [drm] Cannot find any crtc or sizes
usb 3-1: USB disconnect, device number 4
==================================================================
BUG: KASAN: use-after-free in __list_add_valid+0x93/0xb0 lib/list_debug.c:27
Read of size 8 at addr ffff888025a28108 by task kworker/1:2/142

CPU: 1 PID: 142 Comm: kworker/1:2 Not tainted 6.0.0-rc3-next-20220901-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
 __list_add_valid+0x93/0xb0 lib/list_debug.c:27
 __list_add include/linux/list.h:69 [inline]
 list_add include/linux/list.h:88 [inline]
 list_move include/linux/list.h:218 [inline]
 udl_get_urb_timeout+0x20e/0x550 drivers/gpu/drm/udl/udl_main.c:250
 udl_free_urb_list+0x15f/0x250 drivers/gpu/drm/udl/udl_main.c:156
 udl_drop_usb+0xd0/0x160 drivers/gpu/drm/udl/udl_main.c:358
 udl_usb_disconnect+0x3f/0x50 drivers/gpu/drm/udl/udl_drv.c:114
 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:550 [inline]
 device_remove+0x11f/0x170 drivers/base/dd.c:542
 __device_release_driver drivers/base/dd.c:1239 [inline]
 device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1265
 bus_remove_device+0x2e3/0x590 drivers/base/bus.c:529
 device_del+0x4f3/0xc80 drivers/base/core.c:3704
 usb_disable_device+0x356/0x7a0 drivers/usb/core/message.c:1419
 usb_disconnect.cold+0x259/0x6ed drivers/usb/core/hub.c:2235
 hub_port_connect drivers/usb/core/hub.c:5197 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
 port_event drivers/usb/core/hub.c:5653 [inline]
 hub_event+0x1f86/0x4610 drivers/usb/core/hub.c:5735
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 process_scheduled_works kernel/workqueue.c:2352 [inline]
 worker_thread+0x854/0x1080 kernel/workqueue.c:2438
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 142:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc mm/kasan/common.c:516 [inline]
 ____kasan_kmalloc mm/kasan/common.c:475 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc include/linux/slab.h:695 [inline]
 udl_alloc_urb_list drivers/gpu/drm/udl/udl_main.c:190 [inline]
 udl_init+0x736/0xc80 drivers/gpu/drm/udl/udl_main.c:331
 udl_driver_create drivers/gpu/drm/udl/udl_drv.c:79 [inline]
 udl_usb_probe+0x4f/0x100 drivers/gpu/drm/udl/udl_drv.c:94
 usb_probe_interface+0x30b/0x7f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:560 [inline]
 really_probe+0x249/0xb90 drivers/base/dd.c:639
 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808
 __device_attach_driver+0x206/0x2e0 drivers/base/dd.c:931
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x1e4/0x530 drivers/base/dd.c:1003
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xbd5/0x1e90 drivers/base/core.c:3517
 usb_set_configuration+0x1019/0x1900 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd4/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:560 [inline]
 really_probe+0x249/0xb90 drivers/base/dd.c:639
 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808
 __device_attach_driver+0x206/0x2e0 drivers/base/dd.c:931
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x1e4/0x530 drivers/base/dd.c:1003
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xbd5/0x1e90 drivers/base/core.c:3517
 usb_new_device.cold+0x685/0x10ad drivers/usb/core/hub.c:2573
 hub_port_connect drivers/usb/core/hub.c:5353 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
 port_event drivers/usb/core/hub.c:5653 [inline]
 hub_event+0x26c7/0x4610 drivers/usb/core/hub.c:5735
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Freed by task 142:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:367 [inline]
 ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1651 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1677
 slab_free mm/slub.c:3580 [inline]
 __kmem_cache_free+0xab/0x3b0 mm/slub.c:3593
 udl_free_urb_list+0x136/0x250 drivers/gpu/drm/udl/udl_main.c:164
 udl_drop_usb+0xd0/0x160 drivers/gpu/drm/udl/udl_main.c:358
 udl_usb_disconnect+0x3f/0x50 drivers/gpu/drm/udl/udl_drv.c:114
 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:550 [inline]
 device_remove+0x11f/0x170 drivers/base/dd.c:542
 __device_release_driver drivers/base/dd.c:1239 [inline]
 device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1265
 bus_remove_device+0x2e3/0x590 drivers/base/bus.c:529
 device_del+0x4f3/0xc80 drivers/base/core.c:3704
 usb_disable_device+0x356/0x7a0 drivers/usb/core/message.c:1419
 usb_disconnect.cold+0x259/0x6ed drivers/usb/core/hub.c:2235
 hub_port_connect drivers/usb/core/hub.c:5197 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
 port_event drivers/usb/core/hub.c:5653 [inline]
 hub_event+0x1f86/0x4610 drivers/usb/core/hub.c:5735
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 process_scheduled_works kernel/workqueue.c:2352 [inline]
 worker_thread+0x854/0x1080 kernel/workqueue.c:2438
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
 kvfree_call_rcu+0x74/0x8f0 kernel/rcu/tree.c:3341
 dropmon_net_event+0xbd/0x310 net/core/drop_monitor.c:1580
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945
 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]
 call_netdevice_notifiers net/core/dev.c:1997 [inline]
 unregister_netdevice_many+0xa62/0x1980 net/core/dev.c:10860
 ip6_tnl_exit_batch_net+0x5f5/0x890 net/ipv6/ip6_tunnel.c:2312
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:168
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:595
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

The buggy address belongs to the object at ffff888025a28100
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 8 bytes inside of
 32-byte region [ffff888025a28100, ffff888025a28120)

The buggy address belongs to the physical page:
page:ffffea0000968a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25a28
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888011841500
raw: 0000000000000000 0000000000400040 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 4084, tgid 4083 (syz-executor.5), ts 207960001306, free_ts 207940985839
 prep_new_page mm/page_alloc.c:2534 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4284
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5542
 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280
 alloc_slab_page mm/slub.c:1721 [inline]
 allocate_slab+0x228/0x370 mm/slub.c:1866
 new_slab mm/slub.c:1919 [inline]
 ___slab_alloc+0xad0/0x1440 mm/slub.c:3100
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3198
 slab_alloc_node mm/slub.c:3283 [inline]
 __kmem_cache_alloc_node+0x18a/0x3d0 mm/slub.c:3356
 kmalloc_trace+0x22/0x60 mm/slab_common.c:1010
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc include/linux/slab.h:695 [inline]
 ref_tracker_alloc+0x14c/0x550 lib/ref_tracker.c:85
 __netdev_tracker_alloc include/linux/netdevice.h:3970 [inline]
 netdev_hold include/linux/netdevice.h:3999 [inline]
 ipip6_tunnel_init+0x348/0x4c0 net/ipv6/sit.c:1458
 register_netdevice+0x5e1/0x1680 net/core/dev.c:10000
 register_netdev+0x2d/0x50 net/core/dev.c:10196
 sit_init_net+0x350/0xa30 net/ipv6/sit.c:1915
 ops_init+0xaf/0x470 net/core/net_namespace.c:135
 setup_net+0x5d1/0xc50 net/core/net_namespace.c:326
 copy_net_ns+0x318/0x760 net/core/net_namespace.c:472
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1451 [inline]
 free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1501
 free_unref_page_prepare mm/page_alloc.c:3382 [inline]
 free_unref_page_list+0x16f/0xb90 mm/page_alloc.c:3524
 release_pages+0xc6c/0x1590 mm/swap.c:1056
 tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:58
 tlb_flush_mmu_free mm/mmu_gather.c:255 [inline]
 tlb_flush_mmu mm/mmu_gather.c:262 [inline]
 tlb_finish_mmu+0x147/0x7e0 mm/mmu_gather.c:353
 exit_mmap+0x1fe/0x720 mm/mmap.c:3102
 __mmput+0x128/0x4c0 kernel/fork.c:1187
 mmput+0x5c/0x70 kernel/fork.c:1209
 exit_mm kernel/exit.c:515 [inline]
 do_exit+0xb4c/0x2b60 kernel/exit.c:805
 __do_sys_exit kernel/exit.c:915 [inline]
 __se_sys_exit kernel/exit.c:913 [inline]
 __x64_sys_exit+0x3e/0x50 kernel/exit.c:913
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff888025a28000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 ffff888025a28080: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
>ffff888025a28100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
                      ^
 ffff888025a28180: fa fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc
 ffff888025a28200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
==================================================================