================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0xaa/0x130 lib/list_debug.c:62 Read of size 8 at addr ffff8881d0bc4c70 by task kworker/1:2/32387 CPU: 1 PID: 32387 Comm: kworker/1:2 Not tainted 5.15.73-syzkaller-04348-g44b8b2ac1d96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: events linkwatch_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3d0 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x1a6/0x1f0 mm/kasan/report.c:452 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 __list_del_entry_valid+0xaa/0x130 lib/list_debug.c:62 __list_del_entry include/linux/list.h:132 [inline] list_del_init include/linux/list.h:204 [inline] process_one_work+0x45b/0xc00 kernel/workqueue.c:2257 worker_thread+0xb3e/0x1340 kernel/workqueue.c:2460 kthread+0x41c/0x500 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Allocated by task 11488: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:254 [inline] __kmalloc+0x203/0x350 mm/slub.c:4423 __kmalloc_node include/linux/slab.h:457 [inline] kmalloc_node include/linux/slab.h:614 [inline] kvmalloc_node+0x82/0x130 mm/util.c:623 kvmalloc include/linux/mm.h:844 [inline] kvzalloc include/linux/mm.h:852 [inline] alloc_netdev_mqs+0x8c/0xc80 net/core/dev.c:10828 alloc_etherdev_mqs+0x33/0x40 net/ethernet/eth.c:393 usbnet_probe+0x1c2/0x2750 drivers/net/usb/usbnet.c:1694 usb_probe_interface+0x632/0xae0 drivers/usb/core/driver.c:396 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1b7/0x290 drivers/base/dd.c:750 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:780 __device_attach_driver+0x2bf/0x470 drivers/base/dd.c:902 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x32b/0x530 drivers/base/dd.c:974 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1023 bus_probe_device+0xbc/0x1f0 drivers/base/bus.c:487 device_add+0xb1e/0xef0 drivers/base/core.c:3404 usb_set_configuration+0x1a91/0x2020 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x140/0x240 drivers/usb/core/driver.c:293 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1b7/0x290 drivers/base/dd.c:750 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:780 __device_attach_driver+0x2bf/0x470 drivers/base/dd.c:902 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x32b/0x530 drivers/base/dd.c:974 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1023 bus_probe_device+0xbc/0x1f0 drivers/base/bus.c:487 device_add+0xb1e/0xef0 drivers/base/core.c:3404 usb_new_device+0x1012/0x1ba0 drivers/usb/core/hub.c:2572 hub_port_connect drivers/usb/core/hub.c:5362 [inline] hub_port_connect_change drivers/usb/core/hub.c:5506 [inline] port_event drivers/usb/core/hub.c:5652 [inline] hub_event+0x2c85/0x5160 drivers/usb/core/hub.c:5734 process_one_work+0x6db/0xc00 kernel/workqueue.c:2313 worker_thread+0xb3e/0x1340 kernel/workqueue.c:2460 kthread+0x41c/0x500 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Freed by task 11488: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:220 [inline] slab_free_hook mm/slub.c:1721 [inline] slab_free_freelist_hook+0xc9/0x1a0 mm/slub.c:1747 slab_free mm/slub.c:3515 [inline] kfree+0xc8/0x210 mm/slub.c:4575 kvfree+0x35/0x40 mm/util.c:658 netdev_freemem+0x3e/0x60 net/core/dev.c:10782 netdev_release+0x79/0xa0 net/core/net-sysfs.c:1903 device_release+0x9c/0x1d0 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x163/0x240 lib/kobject.c:753 put_device+0x1f/0x30 drivers/base/core.c:3511 free_netdev+0x365/0x450 net/core/dev.c:10968 usbnet_disconnect+0x277/0x3b0 drivers/net/usb/usbnet.c:1633 usb_unbind_interface+0x20f/0x8e0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1220 [inline] device_release_driver_internal+0x528/0x7e0 drivers/base/dd.c:1253 device_release_driver+0x19/0x20 drivers/base/dd.c:1276 bus_remove_device+0x2de/0x340 drivers/base/bus.c:529 device_del+0x64e/0xec0 drivers/base/core.c:3591 usb_disable_device+0x3a4/0x710 drivers/usb/core/message.c:1419 usb_disconnect+0x342/0x880 drivers/usb/core/hub.c:2229 hub_port_connect drivers/usb/core/hub.c:5206 [inline] hub_port_connect_change drivers/usb/core/hub.c:5506 [inline] port_event drivers/usb/core/hub.c:5652 [inline] hub_event+0x1d59/0x5160 drivers/usb/core/hub.c:5734 process_one_work+0x6db/0xc00 kernel/workqueue.c:2313 process_scheduled_works kernel/workqueue.c:2376 [inline] worker_thread+0xe94/0x1340 kernel/workqueue.c:2462 kthread+0x41c/0x500 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 insert_work+0x56/0x340 kernel/workqueue.c:1369 __queue_work+0x934/0xcf0 kernel/workqueue.c:1535 queue_work_on+0xf2/0x170 kernel/workqueue.c:1562 usbnet_link_change+0xe6/0x100 usbnet_probe+0x1cf3/0x2750 drivers/net/usb/usbnet.c:1835 usb_probe_interface+0x632/0xae0 drivers/usb/core/driver.c:396 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1b7/0x290 drivers/base/dd.c:750 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:780 __device_attach_driver+0x2bf/0x470 drivers/base/dd.c:902 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x32b/0x530 drivers/base/dd.c:974 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1023 bus_probe_device+0xbc/0x1f0 drivers/base/bus.c:487 device_add+0xb1e/0xef0 drivers/base/core.c:3404 usb_set_configuration+0x1a91/0x2020 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x140/0x240 drivers/usb/core/driver.c:293 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1b7/0x290 drivers/base/dd.c:750 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:780 __device_attach_driver+0x2bf/0x470 drivers/base/dd.c:902 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x32b/0x530 drivers/base/dd.c:974 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1023 bus_probe_device+0xbc/0x1f0 drivers/base/bus.c:487 device_add+0xb1e/0xef0 drivers/base/core.c:3404 usb_new_device+0x1012/0x1ba0 drivers/usb/core/hub.c:2572 hub_port_connect drivers/usb/core/hub.c:5362 [inline] hub_port_connect_change drivers/usb/core/hub.c:5506 [inline] port_event drivers/usb/core/hub.c:5652 [inline] hub_event+0x2c85/0x5160 drivers/usb/core/hub.c:5734 process_one_work+0x6db/0xc00 kernel/workqueue.c:2313 worker_thread+0xb3e/0x1340 kernel/workqueue.c:2460 kthread+0x41c/0x500 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 The buggy address belongs to the object at ffff8881d0bc4000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3184 bytes inside of 4096-byte region [ffff8881d0bc4000, ffff8881d0bc5000) The buggy address belongs to the page: page:ffffea000742f000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d0bc0 head:ffffea000742f000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0005559e00 0000000300000003 ffff888100043380 raw: 0000000000000000 0000000000040004 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 29209, ts 2316242512297, free_ts 2084809258253 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1ab/0x1b0 mm/page_alloc.c:2495 prep_new_page mm/page_alloc.c:2501 [inline] get_page_from_freelist+0x38b/0x400 mm/page_alloc.c:4281 __alloc_pages+0x3a8/0x7c0 mm/page_alloc.c:5548 allocate_slab+0x62/0x580 mm/slub.c:1928 new_slab mm/slub.c:1991 [inline] ___slab_alloc+0x2e2/0x6f0 mm/slub.c:3024 __slab_alloc+0x4a/0x90 mm/slub.c:3111 slab_alloc_node mm/slub.c:3202 [inline] slab_alloc mm/slub.c:3244 [inline] __kmalloc_track_caller+0x25a/0x350 mm/slub.c:4941 kmemdup+0x24/0x50 mm/util.c:131 __addrconf_sysctl_register+0xad/0x3c0 net/ipv6/addrconf.c:7064 addrconf_sysctl_register+0x141/0x1a0 net/ipv6/addrconf.c:7129 ipv6_add_dev+0xc75/0x1120 net/ipv6/addrconf.c:455 addrconf_notify+0x584/0xec0 net/ipv6/addrconf.c:3550 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x9e/0x110 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2005 [inline] call_netdevice_notifiers_extack net/core/dev.c:2017 [inline] call_netdevice_notifiers+0x14e/0x1d0 net/core/dev.c:2031 register_netdevice+0x13bb/0x1720 net/core/dev.c:10363 xfrmi_create net/xfrm/xfrm_interface.c:156 [inline] xfrmi_newlink+0x37d/0x480 net/xfrm/xfrm_interface.c:662 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1364 [inline] free_pcp_prepare+0x448/0x450 mm/page_alloc.c:1435 free_unref_page_prepare mm/page_alloc.c:3433 [inline] free_unref_page+0x9c/0x370 mm/page_alloc.c:3513 free_the_page mm/page_alloc.c:706 [inline] __free_pages+0xd8/0x100 mm/page_alloc.c:5621 __free_slab+0xf0/0x1d0 mm/slub.c:2016 free_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x17d/0x1b0 mm/slub.c:2523 put_cpu_partial+0xc4/0x120 mm/slub.c:2603 __slab_free+0x1c0/0x2f0 mm/slub.c:3384 do_slab_free mm/slub.c:3503 [inline] ___cache_free+0x112/0x130 mm/slub.c:3522 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x4c/0xc0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook mm/slab.h:550 [inline] slab_alloc_node mm/slub.c:3236 [inline] slab_alloc mm/slub.c:3244 [inline] kmem_cache_alloc+0x189/0x2f0 mm/slub.c:3249 getname_flags+0xba/0x510 fs/namei.c:138 user_path_at_empty+0x2e/0x1b0 fs/namei.c:2852 do_readlinkat+0x11b/0x3b0 fs/stat.c:442 Memory state around the buggy address: ffff8881d0bc4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d0bc4b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881d0bc4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d0bc4c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d0bc4d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== usb 5-1: reset high-speed USB device number 41 using dummy_hcd usb 5-1: Using ep0 maxpacket: 8 usb 5-1: USB disconnect, device number 41 usb 5-1: new high-speed USB device number 42 using dummy_hcd usb 5-1: Using ep0 maxpacket: 8 usb 5-1: config index 0 descriptor too short (expected 5924, got 36) usb 5-1: config 250 has an invalid interface number: 228 but max is -1 usb 5-1: config 250 has an invalid descriptor of length 0, skipping remainder of the config usb 5-1: config 250 has 1 interface, different from the descriptor's value: 0 usb 5-1: config 250 has no interface number 0 usb 5-1: config 250 interface 228 altsetting 255 endpoint 0x1 has invalid maxpacket 65280, setting to 1024 usb 5-1: config 250 interface 228 altsetting 255 bulk endpoint 0x1 has invalid maxpacket 1024 usb 5-1: config 250 interface 228 altsetting 255 has 1 endpoint descriptor, different from the interface descriptor's value: 17 usb 5-1: config 250 interface 228 has no altsetting 0 usb 5-1: New USB device found, idVendor=0525, idProduct=d292, bcdDevice= 0.07 usb 5-1: New USB device strings: Mfr=0, Product=106, SerialNumber=59 usb 5-1: Product: syz usb 5-1: SerialNumber: syz hub 5-1:250.228: bad descriptor, ignoring hub hub: probe of 5-1:250.228 failed with error -5 usb 5-1: reset high-speed USB device number 42 using dummy_hcd usb 5-1: Using ep0 maxpacket: 8