================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0xa6/0x130 lib/list_debug.c:62 Read of size 8 at addr ffff88812ec74cf0 by task kworker/0:9/2615 CPU: 0 PID: 2615 Comm: kworker/0:9 Tainted: G W 6.1.75-syzkaller-00036-g692e3553d2e9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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 mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351 __list_del_entry_valid+0xa6/0x130 lib/list_debug.c:62 __list_del_entry include/linux/list.h:134 [inline] list_del_init include/linux/list.h:206 [inline] process_one_work+0x4d7/0xcb0 kernel/workqueue.c:2243 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446 kthread+0x26d/0x300 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 2616: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:957 [inline] __kmalloc_node+0xb4/0x1e0 mm/slab_common.c:964 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0x221/0x640 mm/util.c:592 kvmalloc include/linux/slab.h:706 [inline] kvzalloc include/linux/slab.h:714 [inline] alloc_netdev_mqs+0x8c/0xf90 net/core/dev.c:10626 alloc_etherdev_mqs+0x36/0x40 net/ethernet/eth.c:394 usbnet_probe+0x207/0x27c0 drivers/net/usb/usbnet.c:1693 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:397 really_probe+0x2b8/0x920 drivers/base/dd.c:639 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:1038 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487 device_add+0xb60/0xf10 drivers/base/core.c:3664 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:294 really_probe+0x2b8/0x920 drivers/base/dd.c:639 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:1038 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487 device_add+0xb60/0xf10 drivers/base/core.c:3664 usb_new_device+0xf32/0x1810 drivers/usb/core/hub.c:2608 hub_port_connect drivers/usb/core/hub.c:5511 [inline] hub_port_connect_change drivers/usb/core/hub.c:5651 [inline] port_event drivers/usb/core/hub.c:5811 [inline] hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5893 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446 kthread+0x26d/0x300 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Freed by task 2616: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1745 [inline] slab_free_freelist_hook mm/slub.c:1771 [inline] slab_free mm/slub.c:3684 [inline] __kmem_cache_free+0x218/0x3b0 mm/slub.c:3697 kfree+0x7a/0xf0 mm/slab_common.c:1009 kvfree+0x35/0x40 mm/util.c:639 netdev_freemem+0x3f/0x60 net/core/dev.c:10580 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1906 device_release+0x95/0x1c0 kobject_cleanup lib/kobject.c:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x178/0x260 lib/kobject.c:729 put_device+0x1f/0x30 drivers/base/core.c:3772 free_netdev+0x393/0x480 net/core/dev.c:10773 usbnet_disconnect+0x245/0x390 drivers/net/usb/usbnet.c:1632 usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:459 device_remove drivers/base/dd.c:550 [inline] __device_release_driver drivers/base/dd.c:1283 [inline] device_release_driver_internal+0x53e/0x870 drivers/base/dd.c:1309 device_release_driver+0x19/0x20 drivers/base/dd.c:1332 bus_remove_device+0x2fa/0x360 drivers/base/bus.c:529 device_del+0x663/0xe90 drivers/base/core.c:3852 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1414 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2271 hub_port_connect drivers/usb/core/hub.c:5350 [inline] hub_port_connect_change drivers/usb/core/hub.c:5651 [inline] port_event drivers/usb/core/hub.c:5811 [inline] hub_event+0x1ed8/0x4830 drivers/usb/core/hub.c:5893 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299 process_scheduled_works kernel/workqueue.c:2362 [inline] worker_thread+0xd71/0x1260 kernel/workqueue.c:2448 kthread+0x26d/0x300 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 insert_work+0x56/0x310 kernel/workqueue.c:1368 __queue_work+0x9b6/0xd70 kernel/workqueue.c:1527 queue_work_on+0x105/0x170 kernel/workqueue.c:1555 usbnet_link_change+0xeb/0x100 usbnet_probe+0x1dbe/0x27c0 drivers/net/usb/usbnet.c:1840 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:397 really_probe+0x2b8/0x920 drivers/base/dd.c:639 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:1038 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487 device_add+0xb60/0xf10 drivers/base/core.c:3664 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:294 really_probe+0x2b8/0x920 drivers/base/dd.c:639 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:1038 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487 device_add+0xb60/0xf10 drivers/base/core.c:3664 usb_new_device+0xf32/0x1810 drivers/usb/core/hub.c:2608 hub_port_connect drivers/usb/core/hub.c:5511 [inline] hub_port_connect_change drivers/usb/core/hub.c:5651 [inline] port_event drivers/usb/core/hub.c:5811 [inline] hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5893 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446 kthread+0x26d/0x300 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff88812ec74000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3312 bytes inside of 4096-byte region [ffff88812ec74000, ffff88812ec75000) The buggy address belongs to the physical page: page:ffffea0004bb1c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12ec70 head:ffffea0004bb1c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000001 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 16237, tgid 16237 (syz-executor.3), ts 1270109141649, free_ts 1259243525503 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597 get_page_from_freelist+0x27ea/0x2870 mm/page_alloc.c:4425 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5712 alloc_slab_page+0x6c/0xf0 allocate_slab mm/slub.c:1962 [inline] new_slab+0x90/0x3e0 mm/slub.c:2015 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203 __slab_alloc+0x5d/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x1af/0x250 mm/slub.c:3460 __do_kmalloc_node mm/slab_common.c:956 [inline] __kmalloc_node_track_caller+0xa2/0x1e0 mm/slab_common.c:977 kmemdup+0x29/0x60 mm/util.c:134 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline] __devinet_sysctl_register+0xac/0x2a0 net/ipv4/devinet.c:2574 devinet_sysctl_register+0x16a/0x1e0 net/ipv4/devinet.c:2626 inetdev_init+0x2b4/0x4e0 net/ipv4/devinet.c:279 inetdev_event+0x205/0x1110 net/ipv4/devinet.c:1534 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:455 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1498 [inline] free_pcp_prepare mm/page_alloc.c:1572 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3498 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3594 free_the_page mm/page_alloc.c:798 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5801 __free_slab+0xce/0x1a0 mm/slub.c:2039 free_slab mm/slub.c:2054 [inline] discard_slab mm/slub.c:2060 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2609 put_cpu_partial+0xa9/0x100 mm/slub.c:2685 __slab_free+0x1c8/0x280 mm/slub.c:3561 do_slab_free mm/slub.c:3638 [inline] ___cache_free+0xc6/0xd0 mm/slub.c:3691 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0xc5/0x140 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768 slab_alloc_node mm/slub.c:3421 [inline] slab_alloc mm/slub.c:3429 [inline] __kmem_cache_alloc_lru mm/slub.c:3436 [inline] kmem_cache_alloc+0x175/0x2c0 mm/slub.c:3445 kmem_cache_zalloc include/linux/slab.h:679 [inline] alloc_buffer_head+0x26/0x110 fs/buffer.c:2947 alloc_page_buffers+0x1dc/0x3f0 fs/buffer.c:872 create_empty_buffers+0x3d/0x4f0 fs/buffer.c:1586 Memory state around the buggy address: ffff88812ec74b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812ec74c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88812ec74c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88812ec74d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812ec74d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== usb 4-1: new high-speed USB device number 120 using dummy_hcd usb 4-1: Using ep0 maxpacket: 32 usb 4-1: config 4 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 4-1: config 4 interface 0 altsetting 0 endpoint 0x81 has invalid wMaxPacketSize 0 usb 4-1: New USB device found, idVendor=046d, idProduct=c314, bcdDevice= 0.40 usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 hub 4-1:4.0: USB hub found hub 4-1:4.0: 2 ports detected