================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 Read of size 8 at addr ffff88807e64d360 by task kworker/0:12/6945 CPU: 0 PID: 6945 Comm: kworker/0:12 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 class_register+0xed/0x530 drivers/base/class.c:172 class_create+0x99/0x100 drivers/base/class.c:249 init_usb_class drivers/usb/core/file.c:91 [inline] usb_register_dev+0x4e7/0x860 drivers/usb/core/file.c:179 usblp_probe+0xc91/0x16d0 drivers/usb/class/usblp.c:1208 usb_probe_interface+0x30f/0x960 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x240/0xca0 drivers/base/dd.c:658 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:795 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:825 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:953 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1025 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x11c4/0x1c50 drivers/base/core.c:3611 usb_set_configuration+0x10ee/0x1af0 drivers/usb/core/message.c:2171 usb_generic_driver_probe+0xcf/0x130 drivers/usb/core/generic.c:238 usb_probe_device+0xd8/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x240/0xca0 drivers/base/dd.c:658 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:795 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:825 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:953 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1025 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x11c4/0x1c50 drivers/base/core.c:3611 usb_new_device+0xcb2/0x19d0 drivers/usb/core/hub.c:2575 hub_port_connect drivers/usb/core/hub.c:5407 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x2d9e/0x4e40 drivers/usb/core/hub.c:5793 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 5735: kasan_save_stack+0x22/0x40 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 mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] class_register+0x55/0x530 drivers/base/class.c:165 class_create+0x99/0x100 drivers/base/class.c:249 init_usb_class drivers/usb/core/file.c:91 [inline] usb_register_dev+0x4e7/0x860 drivers/usb/core/file.c:179 usblp_probe+0xc91/0x16d0 drivers/usb/class/usblp.c:1208 usb_probe_interface+0x30f/0x960 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x240/0xca0 drivers/base/dd.c:658 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:795 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:825 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:953 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1025 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x11c4/0x1c50 drivers/base/core.c:3611 usb_set_configuration+0x10ee/0x1af0 drivers/usb/core/message.c:2171 usb_generic_driver_probe+0xcf/0x130 drivers/usb/core/generic.c:238 usb_probe_device+0xd8/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x240/0xca0 drivers/base/dd.c:658 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:795 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:825 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:953 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1025 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532 device_add+0x11c4/0x1c50 drivers/base/core.c:3611 usb_new_device+0xcb2/0x19d0 drivers/usb/core/hub.c:2575 hub_port_connect drivers/usb/core/hub.c:5407 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x2d9e/0x4e40 drivers/usb/core/hub.c:5793 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Freed by task 5735: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 kobject_cleanup lib/kobject.c:683 [inline] kobject_release lib/kobject.c:714 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c2/0x4d0 lib/kobject.c:731 kset_unregister+0x64/0x80 lib/kobject.c:880 class_destroy+0x3c/0x50 drivers/base/class.c:273 release_usb_class drivers/usb/core/file.c:108 [inline] kref_put include/linux/kref.h:65 [inline] destroy_usb_class drivers/usb/core/file.c:116 [inline] usb_deregister_dev+0x274/0x320 drivers/usb/core/file.c:245 usblp_disconnect+0x4a/0x330 drivers/usb/class/usblp.c:1396 usb_unbind_interface+0x1dc/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1267 [inline] device_release_driver_internal+0x443/0x610 drivers/base/dd.c:1290 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574 device_del+0x48a/0xb80 drivers/base/core.c:3797 usb_disable_device+0x35a/0x7b0 drivers/usb/core/message.c:1420 usb_disconnect+0x2db/0x8a0 drivers/usb/core/hub.c:2238 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x1fbf/0x4e40 drivers/usb/core/hub.c:5793 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 process_scheduled_works kernel/workqueue.c:2468 [inline] worker_thread+0x881/0x10c0 kernel/workqueue.c:2554 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff88807e64d000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 864 bytes inside of freed 1024-byte region [ffff88807e64d000, ffff88807e64d400) The buggy address belongs to the physical page: page:ffffea0001f99200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e648 head:ffffea0001f99200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012441dc0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 26, tgid 26 (kworker/1:1), ts 275366237183, free_ts 273404002255 prep_new_page mm/page_alloc.c:1729 [inline] get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:680 [inline] neigh_alloc net/core/neighbour.c:486 [inline] ___neigh_create+0x156f/0x2a40 net/core/neighbour.c:640 ip6_finish_output2+0xfe9/0x1560 net/ipv6/ip6_output.c:125 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x694/0x1170 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508 ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718 addrconf_dad_completed+0x37a/0xe00 net/ipv6/addrconf.c:4254 addrconf_dad_work+0x75d/0x1390 net/ipv6/addrconf.c:4162 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x4d8/0xb80 mm/page_alloc.c:2555 free_unref_page+0x33/0x370 mm/page_alloc.c:2650 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3452 [inline] kmem_cache_alloc_node+0x185/0x3e0 mm/slub.c:3497 __alloc_skb+0x288/0x330 net/core/skbuff.c:594 alloc_skb include/linux/skbuff.h:1275 [inline] alloc_skb_with_frags+0x97/0x6c0 net/core/skbuff.c:6316 sock_alloc_send_pskb+0x7a7/0x930 net/core/sock.c:2734 sock_alloc_send_skb include/net/sock.h:1860 [inline] mld_newpack.isra.0+0x1b9/0x770 net/ipv6/mcast.c:1748 add_grhead+0x295/0x340 net/ipv6/mcast.c:1851 add_grec+0x1053/0x1610 net/ipv6/mcast.c:1989 mld_send_cr net/ipv6/mcast.c:2115 [inline] mld_ifc_work+0x42c/0xe20 net/ipv6/mcast.c:2653 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 Memory state around the buggy address: ffff88807e64d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e64d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807e64d300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807e64d380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e64d400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================