================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0xa6/0x130 lib/list_debug.c:62 Read of size 8 at addr ffff88811a148cf0 by task kworker/1:5/411 CPU: 1 PID: 411 Comm: kworker/1:5 Not tainted 6.1.43-syzkaller-1150392-g61ca1246d99e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: rcu_gp process_srcu 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:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 24: 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:10594 alloc_etherdev_mqs+0x36/0x40 net/ethernet/eth.c:394 usbnet_probe+0x1a6/0x25b0 drivers/net/usb/usbnet.c:1693 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396 really_probe+0x2b8/0x920 drivers/base/dd.c:639 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:806 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:836 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:964 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:1036 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1085 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:2170 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+0x2b8/0x920 drivers/base/dd.c:639 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:806 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:836 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:964 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:1036 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1085 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:2590 hub_port_connect drivers/usb/core/hub.c:5422 [inline] hub_port_connect_change drivers/usb/core/hub.c:5566 [inline] port_event drivers/usb/core/hub.c:5726 [inline] hub_event+0x2bc3/0x4940 drivers/usb/core/hub.c:5808 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446 kthread+0x26d/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Freed by task 24: 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:10548 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:10741 usbnet_disconnect+0x245/0x390 drivers/net/usb/usbnet.c:1632 usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:550 [inline] __device_release_driver drivers/base/dd.c:1281 [inline] device_release_driver_internal+0x53e/0x870 drivers/base/dd.c:1307 device_release_driver+0x19/0x20 drivers/base/dd.c:1330 bus_remove_device+0x2fa/0x360 drivers/base/bus.c:529 device_del+0x68b/0xec0 drivers/base/core.c:3852 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1419 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2253 hub_port_connect drivers/usb/core/hub.c:5261 [inline] hub_port_connect_change drivers/usb/core/hub.c:5566 [inline] port_event drivers/usb/core/hub.c:5726 [inline] hub_event+0x1cf9/0x4940 drivers/usb/core/hub.c:5808 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:376 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+0x1c08/0x25b0 drivers/net/usb/usbnet.c:1834 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396 really_probe+0x2b8/0x920 drivers/base/dd.c:639 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:806 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:836 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:964 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:1036 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1085 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:2170 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+0x2b8/0x920 drivers/base/dd.c:639 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:806 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:836 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:964 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x312/0x510 drivers/base/dd.c:1036 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1085 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:2590 hub_port_connect drivers/usb/core/hub.c:5422 [inline] hub_port_connect_change drivers/usb/core/hub.c:5566 [inline] port_event drivers/usb/core/hub.c:5726 [inline] hub_event+0x2bc3/0x4940 drivers/usb/core/hub.c:5808 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446 kthread+0x26d/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff88811a148000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3312 bytes inside of 4096-byte region [ffff88811a148000, ffff88811a149000) The buggy address belongs to the physical page: page:ffffea0004685200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11a148 head:ffffea0004685200 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 24, tgid 24 (kworker/1:0), ts 49727147731, free_ts 49539217967 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2586 prep_new_page+0x1b/0x110 mm/page_alloc.c:2593 get_page_from_freelist+0x2878/0x2910 mm/page_alloc.c:4410 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5698 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+0xa3/0x1e0 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:10594 alloc_etherdev_mqs+0x36/0x40 net/ethernet/eth.c:394 usbnet_probe+0x1a6/0x25b0 drivers/net/usb/usbnet.c:1693 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396 really_probe+0x2b8/0x920 drivers/base/dd.c:639 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1494 [inline] free_pcp_prepare mm/page_alloc.c:1568 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3500 free_unref_page+0xbc/0x650 mm/page_alloc.c:3597 free_the_page mm/page_alloc.c:794 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5787 __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+0x4d/0x90 mm/kasan/quarantine.c:168 qlist_free_all+0x52/0xc0 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 getname_flags+0xba/0x520 fs/namei.c:139 getname+0x19/0x20 fs/namei.c:218 Memory state around the buggy address: ffff88811a148b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811a148c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88811a148c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88811a148d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811a148d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== usb 2-1: new high-speed USB device number 7 using dummy_hcd usb 2-1: Using ep0 maxpacket: 32 usb 2-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 2-1: config 1 interface 1 altsetting 1 bulk endpoint 0x82 has invalid maxpacket 32 usb 2-1: config 1 interface 1 altsetting 1 bulk endpoint 0x3 has invalid maxpacket 64 usb 2-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40 usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 2-1: Product: syz usb 2-1: Manufacturer: syz usb 2-1: SerialNumber: syz cdc_ncm 2-1:1.0: MAC-Address: 42:42:42:42:42:42 cdc_ncm 2-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048 cdc_ncm 2-1:1.0: setting rx_max = 2048 cdc_ncm 2-1:1.0: setting tx_max = 184 cdc_ncm 2-1:1.0 usb0: register 'cdc_ncm' at usb-dummy_hcd.1-1, CDC NCM (NO ZLP), 42:42:42:42:42:42 usb 2-1: USB disconnect, device number 7 cdc_ncm 2-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.1-1, CDC NCM (NO ZLP) usb 1-1: new high-speed USB device number 8 using dummy_hcd