================================================================== BUG: KASAN: use-after-free in worker_thread+0xaaa/0x12a0 kernel/workqueue.c:2470 Read of size 8 at addr ffff88810da6ec60 by task kworker/0:0/6 CPU: 0 PID: 6 Comm: kworker/0:0 Not tainted 5.15.151-syzkaller-00415-gdb06c48ab67e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: 0x0 (usb_hub_wq) Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 worker_thread+0xaaa/0x12a0 kernel/workqueue.c:2470 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 20: 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+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13a/0x270 mm/slub.c:4427 __kmalloc_node include/linux/slab.h:469 [inline] kmalloc_node include/linux/slab.h:626 [inline] kvmalloc_node+0x1f0/0x4d0 mm/util.c:628 kvmalloc include/linux/mm.h:851 [inline] kvzalloc include/linux/mm.h:859 [inline] alloc_netdev_mqs+0x8c/0xc90 net/core/dev.c:10855 alloc_etherdev_mqs+0x33/0x40 net/ethernet/eth.c:393 usbnet_probe+0x1ff/0x2830 drivers/net/usb/usbnet.c:1694 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785 __device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487 device_add+0xb60/0xf10 drivers/base/core.c:3404 usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:293 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785 __device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487 device_add+0xb60/0xf10 drivers/base/core.c:3404 usb_new_device+0x1038/0x1c00 drivers/usb/core/hub.c:2590 hub_port_connect drivers/usb/core/hub.c:5503 [inline] hub_port_connect_change drivers/usb/core/hub.c:5643 [inline] port_event drivers/usb/core/hub.c:5793 [inline] hub_event+0x2def/0x4770 drivers/usb/core/hub.c:5875 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Freed by task 20: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/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:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749 slab_free mm/slub.c:3519 [inline] kfree+0xc8/0x220 mm/slub.c:4579 kvfree+0x35/0x40 mm/util.c:664 netdev_freemem+0x3f/0x60 net/core/dev.c:10809 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1903 device_release+0x95/0x1c0 kobject_cleanup lib/kobject.c:713 [inline] kobject_release lib/kobject.c:744 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x178/0x260 lib/kobject.c:761 put_device+0x1f/0x30 drivers/base/core.c:3512 free_netdev+0x34f/0x440 net/core/dev.c:10995 usbnet_disconnect+0x245/0x390 drivers/net/usb/usbnet.c:1633 usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1229 [inline] device_release_driver_internal+0x50b/0x7d0 drivers/base/dd.c:1262 device_release_driver+0x19/0x20 drivers/base/dd.c:1285 bus_remove_device+0x2f8/0x360 drivers/base/bus.c:529 device_del+0x663/0xe90 drivers/base/core.c:3592 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1414 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2240 hub_port_connect drivers/usb/core/hub.c:5342 [inline] hub_port_connect_change drivers/usb/core/hub.c:5643 [inline] port_event drivers/usb/core/hub.c:5793 [inline] hub_event+0x1d42/0x4770 drivers/usb/core/hub.c:5875 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 process_scheduled_works kernel/workqueue.c:2388 [inline] worker_thread+0xe02/0x12a0 kernel/workqueue.c:2474 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 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+0x56/0x320 kernel/workqueue.c:1373 __queue_work+0x92a/0xcd0 kernel/workqueue.c:1539 queue_work_on+0x105/0x170 kernel/workqueue.c:1566 usbnet_link_change+0xeb/0x100 usbnet_probe+0x1dd3/0x2830 drivers/net/usb/usbnet.c:1841 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785 __device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487 device_add+0xb60/0xf10 drivers/base/core.c:3404 usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:293 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785 __device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487 device_add+0xb60/0xf10 drivers/base/core.c:3404 usb_new_device+0x1038/0x1c00 drivers/usb/core/hub.c:2590 hub_port_connect drivers/usb/core/hub.c:5503 [inline] hub_port_connect_change drivers/usb/core/hub.c:5643 [inline] port_event drivers/usb/core/hub.c:5793 [inline] hub_event+0x2def/0x4770 drivers/usb/core/hub.c:5875 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff88810da6e000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3168 bytes inside of 4096-byte region [ffff88810da6e000, ffff88810da6f000) The buggy address belongs to the page: page:ffffea0004369a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10da68 head:ffffea0004369a00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 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 0x1d60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 20, ts 98954331836, free_ts 98911991271 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604 prep_new_page+0x1b/0x110 mm/page_alloc.c:2610 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] __kmalloc+0x16d/0x270 mm/slub.c:4423 __kmalloc_node include/linux/slab.h:469 [inline] kmalloc_node include/linux/slab.h:626 [inline] kvmalloc_node+0x1f0/0x4d0 mm/util.c:628 kvmalloc include/linux/mm.h:851 [inline] kvzalloc include/linux/mm.h:859 [inline] alloc_netdev_mqs+0x8c/0xc90 net/core/dev.c:10855 alloc_etherdev_mqs+0x33/0x40 net/ethernet/eth.c:393 usbnet_probe+0x1ff/0x2830 drivers/net/usb/usbnet.c:1694 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1471 [inline] free_pcp_prepare mm/page_alloc.c:1543 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533 free_unref_page+0xe8/0x750 mm/page_alloc.c:3615 free_the_page mm/page_alloc.c:804 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5852 __free_slab+0xec/0x1d0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab+0x29/0x40 mm/slub.c:2041 __slab_free+0x205/0x290 mm/slub.c:3424 do_slab_free mm/slub.c:3507 [inline] ___cache_free+0x109/0x120 mm/slub.c:3526 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x44/0xb0 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:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253 getname_flags+0xba/0x520 fs/namei.c:138 user_path_at_empty+0x2d/0x1a0 fs/namei.c:2882 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xfd/0x720 fs/stat.c:221 Memory state around the buggy address: ffff88810da6eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810da6eb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88810da6ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810da6ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810da6ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================