================================================================== BUG: KASAN: use-after-free in worker_thread+0xa2e/0x1200 kernel/workqueue.c:2470 Read of size 8 at addr ffff88812b2b2c60 by task kworker/0:2/360 CPU: 0 PID: 360 Comm: kworker/0:2 Not tainted 5.15.180-syzkaller-1080019-g8034ec1338e8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: 0x0 (events) Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 worker_thread+0xa2e/0x1200 kernel/workqueue.c:2470 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 507: 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 mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13d/0x2c0 mm/slub.c:4431 __kmalloc_node include/linux/slab.h:484 [inline] kmalloc_node include/linux/slab.h:639 [inline] kvmalloc_node+0x242/0x330 mm/util.c:628 kvmalloc include/linux/mm.h:851 [inline] kvzalloc include/linux/mm.h:859 [inline] alloc_netdev_mqs+0x8d/0xc90 net/core/dev.c:10899 alloc_etherdev_mqs+0x34/0x40 net/ethernet/eth.c:383 usbnet_probe+0x219/0x2860 drivers/net/usb/usbnet.c:1723 usb_probe_interface+0x5ff/0xae0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xb31/0xed0 drivers/base/core.c:3422 usb_set_configuration+0x19c2/0x1f10 drivers/usb/core/message.c:2165 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x148/0x260 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xb31/0xed0 drivers/base/core.c:3422 usb_new_device+0xd06/0x1620 drivers/usb/core/hub.c:2610 hub_port_connect drivers/usb/core/hub.c:5525 [inline] hub_port_connect_change drivers/usb/core/hub.c:5665 [inline] port_event drivers/usb/core/hub.c:5815 [inline] hub_event+0x27d8/0x42c0 drivers/usb/core/hub.c:5897 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Freed by task 507: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1749 slab_free mm/slub.c:3521 [inline] kfree+0xc4/0x270 mm/slub.c:4583 kvfree+0x35/0x40 mm/util.c:664 netdev_freemem+0x3f/0x60 net/core/dev.c:10853 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1903 device_release+0x96/0x1c0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:713 [inline] kobject_release lib/kobject.c:744 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x18a/0x270 lib/kobject.c:761 put_device+0x1f/0x30 drivers/base/core.c:3530 free_netdev+0x34b/0x450 net/core/dev.c:11039 usbnet_disconnect+0x24b/0x3a0 drivers/net/usb/usbnet.c:1662 usb_unbind_interface+0x212/0x8c0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1229 [inline] device_release_driver_internal+0x4c1/0x760 drivers/base/dd.c:1262 device_release_driver+0x19/0x20 drivers/base/dd.c:1285 bus_remove_device+0x2dd/0x340 drivers/base/bus.c:531 device_del+0x696/0xe90 drivers/base/core.c:3610 usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1414 usb_disconnect+0x31e/0x850 drivers/usb/core/hub.c:2260 hub_port_connect drivers/usb/core/hub.c:5364 [inline] hub_port_connect_change drivers/usb/core/hub.c:5665 [inline] port_event drivers/usb/core/hub.c:5815 [inline] hub_event+0x190c/0x42c0 drivers/usb/core/hub.c:5897 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325 process_scheduled_works kernel/workqueue.c:2388 [inline] worker_thread+0xd7b/0x1200 kernel/workqueue.c:2474 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 insert_work+0x51/0x310 kernel/workqueue.c:1373 __queue_work+0x8e5/0xc60 kernel/workqueue.c:1539 queue_work_on+0xd2/0x140 kernel/workqueue.c:1566 queue_work include/linux/workqueue.h:510 [inline] schedule_work include/linux/workqueue.h:571 [inline] usbnet_defer_kevent drivers/net/usb/usbnet.c:482 [inline] usbnet_link_change+0x176/0x1a0 drivers/net/usb/usbnet.c:-1 usbnet_probe+0x1dfd/0x2860 drivers/net/usb/usbnet.c:1868 usb_probe_interface+0x5ff/0xae0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xb31/0xed0 drivers/base/core.c:3422 usb_set_configuration+0x19c2/0x1f10 drivers/usb/core/message.c:2165 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x148/0x260 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xb31/0xed0 drivers/base/core.c:3422 usb_new_device+0xd06/0x1620 drivers/usb/core/hub.c:2610 hub_port_connect drivers/usb/core/hub.c:5525 [inline] hub_port_connect_change drivers/usb/core/hub.c:5665 [inline] port_event drivers/usb/core/hub.c:5815 [inline] hub_event+0x27d8/0x42c0 drivers/usb/core/hub.c:5897 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88812b2b2000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3168 bytes inside of 4096-byte region [ffff88812b2b2000, ffff88812b2b3000) The buggy address belongs to the page: page:ffffea0004acac00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12b2b0 head:ffffea0004acac00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 0000000300000001 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 315, ts 30755825114, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5781 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1932 [inline] new_slab+0xa1/0x4d0 mm/slub.c:1995 ___slab_alloc+0x381/0x810 mm/slub.c:3028 __slab_alloc+0x49/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3250 [inline] __kmalloc_track_caller+0x169/0x2c0 mm/slub.c:4949 kmemdup+0x26/0x60 mm/util.c:132 __devinet_sysctl_register+0xad/0x390 net/ipv4/devinet.c:2593 devinet_sysctl_register+0x169/0x1e0 net/ipv4/devinet.c:2645 inetdev_init+0x2b9/0x500 net/ipv4/devinet.c:284 inetdev_event+0x1f8/0x10a0 net/ipv4/devinet.c:1545 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2057 [inline] call_netdevice_notifiers_extack net/core/dev.c:2069 [inline] call_netdevice_notifiers+0x111/0x190 net/core/dev.c:2083 register_netdevice+0x1039/0x13a0 net/core/dev.c:10435 page_owner free stack trace missing Memory state around the buggy address: ffff88812b2b2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812b2b2b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88812b2b2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88812b2b2c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812b2b2d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================