================================================================== BUG: KASAN: use-after-free in worker_thread+0xa36/0x1260 kernel/workqueue.c:2444 Read of size 8 at addr ffff88812d236ce0 by task kworker/0:3/316 CPU: 0 PID: 316 Comm: kworker/0:3 Not tainted 6.1.93-syzkaller-00012-g8a268cb981a6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: 0x0 (wg-crypt-wg2) 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 worker_thread+0xa36/0x1260 kernel/workqueue.c:2444 kthread+0x26d/0x300 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 298: 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:582 [inline] kvmalloc_node+0x221/0x640 mm/util.c:592 kvmalloc include/linux/slab.h:709 [inline] kvzalloc include/linux/slab.h:717 [inline] alloc_netdev_mqs+0x8c/0xf90 net/core/dev.c:10630 alloc_etherdev_mqs+0x36/0x40 net/ethernet/eth.c:384 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:3686 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:3686 usb_new_device+0xf2f/0x1820 drivers/usb/core/hub.c:2645 hub_port_connect drivers/usb/core/hub.c:5554 [inline] hub_port_connect_change drivers/usb/core/hub.c:5694 [inline] port_event drivers/usb/core/hub.c:5854 [inline] hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5936 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:308 Freed by task 298: 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:10584 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1904 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:3794 free_netdev+0x393/0x480 net/core/dev.c:10777 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:3874 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1414 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2300 hub_port_connect drivers/usb/core/hub.c:5393 [inline] hub_port_connect_change drivers/usb/core/hub.c:5694 [inline] port_event drivers/usb/core/hub.c:5854 [inline] hub_event+0x1ed8/0x4830 drivers/usb/core/hub.c:5936 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:308 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:3686 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:3686 usb_new_device+0xf2f/0x1820 drivers/usb/core/hub.c:2645 hub_port_connect drivers/usb/core/hub.c:5554 [inline] hub_port_connect_change drivers/usb/core/hub.c:5694 [inline] port_event drivers/usb/core/hub.c:5854 [inline] hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5936 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:308 The buggy address belongs to the object at ffff88812d236000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3296 bytes inside of 4096-byte region [ffff88812d236000, ffff88812d237000) The buggy address belongs to the physical page: page:ffffea0004b48c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12d230 head:ffffea0004b48c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 292, tgid 292 (syz-executor), ts 26159215775, free_ts 0 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:5714 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] __addrconf_sysctl_register+0xad/0x3e0 net/ipv6/addrconf.c:7131 addrconf_sysctl_register+0x141/0x1a0 net/ipv6/addrconf.c:7196 ipv6_add_dev+0xbd7/0x11a0 net/ipv6/addrconf.c:453 addrconf_notify+0x6d2/0xe10 net/ipv6/addrconf.c:3600 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:455 page_owner free stack trace missing Memory state around the buggy address: ffff88812d236b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812d236c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88812d236c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88812d236d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88812d236d80: 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: 8 usb 2-1: config 1 contains an unexpected descriptor of type 0x1, skipping usb 2-1: config 1 has an invalid descriptor of length 1, skipping remainder of the config usb 2-1: config 1 has 1 interface, different from the descriptor's value: 3 usb 2-1: New USB device found, idVendor=1d6b, idProduct=0101, 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 usb 2-1: 0:2 : does not exist usb 2-1: USB disconnect, device number 7