================================================================== BUG: KASAN: use-after-free in worker_thread+0x9ff/0x11f0 kernel/workqueue.c:2444 Read of size 8 at addr ffff888128d1ace0 by task kworker/1:0/26259 CPU: 1 PID: 26259 Comm: kworker/1:0 Not tainted 6.1.141-syzkaller-00033-g36d69f6a49eb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: 0x0 (events) Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x71/0x210 mm/kasan/report.c:316 print_report+0x4a/0x60 mm/kasan/report.c:427 kasan_report+0x122/0x150 mm/kasan/report.c:531 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351 worker_thread+0x9ff/0x11f0 kernel/workqueue.c:2444 kthread+0x281/0x320 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Allocated by task 9716: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:938 [inline] __kmalloc_node+0xb2/0x1e0 mm/slab_common.c:945 kmalloc_node include/linux/slab.h:589 [inline] kvmalloc_node+0x294/0x480 mm/util.c:592 kvmalloc include/linux/slab.h:716 [inline] kvzalloc include/linux/slab.h:724 [inline] alloc_netdev_mqs+0x8d/0xf90 net/core/dev.c:10680 alloc_etherdev_mqs+0x37/0x40 net/ethernet/eth.c:384 usbnet_probe+0x20c/0x2780 drivers/net/usb/usbnet.c:1720 usb_probe_interface+0x610/0xaf0 drivers/usb/core/driver.c:397 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x2cb/0x960 drivers/base/dd.c:639 __driver_probe_device+0x198/0x280 drivers/base/dd.c:808 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838 __device_attach_driver+0x2e9/0x4a0 drivers/base/dd.c:966 bus_for_each_drv+0x183/0x210 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:1038 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087 bus_probe_device+0xc0/0x1f0 drivers/base/bus.c:489 device_add+0xb4d/0xef0 drivers/base/core.c:3698 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+0x159/0x270 drivers/usb/core/driver.c:294 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x2cb/0x960 drivers/base/dd.c:639 __driver_probe_device+0x198/0x280 drivers/base/dd.c:808 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838 __device_attach_driver+0x2e9/0x4a0 drivers/base/dd.c:966 bus_for_each_drv+0x183/0x210 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:1038 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087 bus_probe_device+0xc0/0x1f0 drivers/base/bus.c:489 device_add+0xb4d/0xef0 drivers/base/core.c:3698 usb_new_device+0xa70/0x1520 drivers/usb/core/hub.c:2656 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5866 [inline] hub_event+0x2a5d/0x4680 drivers/usb/core/hub.c:5948 process_one_work+0x71f/0xc40 kernel/workqueue.c:2299 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446 kthread+0x281/0x320 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Freed by task 9716: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x31/0x50 mm/kasan/generic.c:516 ____kasan_slab_free+0x132/0x180 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+0xc2/0x190 mm/slub.c:1771 slab_free mm/slub.c:3686 [inline] __kmem_cache_free+0xb7/0x1b0 mm/slub.c:3702 kfree+0x6f/0xf0 mm/slab_common.c:990 kvfree+0x35/0x40 mm/util.c:639 netdev_freemem+0x3f/0x60 net/core/dev.c:10634 netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1904 device_release+0xa4/0x1d0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x19d/0x280 lib/kobject.c:729 put_device+0x1f/0x30 drivers/base/core.c:3806 free_netdev+0x392/0x490 net/core/dev.c:10827 usbnet_disconnect+0x25a/0x3b0 drivers/net/usb/usbnet.c:1659 usb_unbind_interface+0x223/0x8d0 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+0x508/0x820 drivers/base/dd.c:1309 device_release_driver+0x19/0x20 drivers/base/dd.c:1332 bus_remove_device+0x2ee/0x350 drivers/base/bus.c:531 device_del+0x6a4/0xeb0 drivers/base/core.c:3886 usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1414 usb_disconnect+0x31e/0x860 drivers/usb/core/hub.c:2311 hub_port_connect drivers/usb/core/hub.c:5405 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5866 [inline] hub_event+0x1bd5/0x4680 drivers/usb/core/hub.c:5948 process_one_work+0x71f/0xc40 kernel/workqueue.c:2299 process_scheduled_works kernel/workqueue.c:2362 [inline] worker_thread+0xd2e/0x11f0 kernel/workqueue.c:2448 kthread+0x281/0x320 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 insert_work+0x51/0x300 kernel/workqueue.c:1368 __queue_work+0x9b1/0xd30 kernel/workqueue.c:1527 queue_work_on+0xd2/0x140 kernel/workqueue.c:1555 queue_work include/linux/workqueue.h:510 [inline] schedule_work include/linux/workqueue.h:571 [inline] usbnet_defer_kevent drivers/net/usb/usbnet.c:479 [inline] usbnet_link_change+0x176/0x1a0 drivers/net/usb/usbnet.c:-1 usbnet_probe+0x1d55/0x2780 drivers/net/usb/usbnet.c:1865 usb_probe_interface+0x610/0xaf0 drivers/usb/core/driver.c:397 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x2cb/0x960 drivers/base/dd.c:639 __driver_probe_device+0x198/0x280 drivers/base/dd.c:808 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838 __device_attach_driver+0x2e9/0x4a0 drivers/base/dd.c:966 bus_for_each_drv+0x183/0x210 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:1038 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087 bus_probe_device+0xc0/0x1f0 drivers/base/bus.c:489 device_add+0xb4d/0xef0 drivers/base/core.c:3698 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+0x159/0x270 drivers/usb/core/driver.c:294 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x2cb/0x960 drivers/base/dd.c:639 __driver_probe_device+0x198/0x280 drivers/base/dd.c:808 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838 __device_attach_driver+0x2e9/0x4a0 drivers/base/dd.c:966 bus_for_each_drv+0x183/0x210 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:1038 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087 bus_probe_device+0xc0/0x1f0 drivers/base/bus.c:489 device_add+0xb4d/0xef0 drivers/base/core.c:3698 usb_new_device+0xa70/0x1520 drivers/usb/core/hub.c:2656 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5866 [inline] hub_event+0x2a5d/0x4680 drivers/usb/core/hub.c:5948 process_one_work+0x71f/0xc40 kernel/workqueue.c:2299 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446 kthread+0x281/0x320 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff888128d1a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3296 bytes inside of 4096-byte region [ffff888128d1a000, ffff888128d1b000) The buggy address belongs to the physical page: page:ffffea0004a34600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x128d18 head:ffffea0004a34600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea0004f1d000 dead000000000002 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 2745, tgid 2745 (udevd), ts 1931551300626, free_ts 1931549080569 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2637 prep_new_page+0x1c/0x110 mm/page_alloc.c:2644 get_page_from_freelist+0x2c7b/0x2cf0 mm/page_alloc.c:4539 __alloc_pages+0x19e/0x3a0 mm/page_alloc.c:5850 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1 allocate_slab mm/slub.c:1962 [inline] new_slab+0x98/0x3d0 mm/slub.c:2015 ___slab_alloc+0x6f6/0xb50 mm/slub.c:3203 __slab_alloc+0x5e/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3462 kmalloc_trace+0x29/0xb0 mm/slab_common.c:1028 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] uevent_show+0x163/0x350 drivers/base/core.c:2665 dev_attr_show+0x64/0xe0 drivers/base/core.c:2373 sysfs_kf_seq_show+0x280/0x3a0 fs/sysfs/file.c:59 kernfs_seq_show+0x12a/0x180 fs/kernfs/file.c:205 seq_read_iter+0x4c4/0xdd0 fs/seq_file.c:230 kernfs_fop_read_iter+0x147/0x480 fs/kernfs/file.c:279 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1545 [inline] free_pcp_prepare mm/page_alloc.c:1619 [inline] free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3581 free_unref_page+0x8f/0x530 mm/page_alloc.c:3677 free_the_page mm/page_alloc.c:830 [inline] free_compound_page+0x99/0xd0 mm/page_alloc.c:853 destroy_large_folio+0x68/0xa0 mm/page_alloc.c:890 __folio_put_large mm/swap.c:110 [inline] __folio_put+0xd1/0xe0 mm/swap.c:118 folio_put include/linux/mm.h:1431 [inline] put_page include/linux/mm.h:1483 [inline] __skb_frag_unref include/linux/skbuff.h:3455 [inline] skb_release_data+0x47f/0x890 net/core/skbuff.c:788 skb_release_all net/core/skbuff.c:859 [inline] __kfree_skb+0x50/0x70 net/core/skbuff.c:873 tcp_wmem_free_skb include/net/tcp.h:308 [inline] tcp_rtx_queue_unlink_and_free+0x400/0x640 include/net/tcp.h:1979 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3408 [inline] tcp_ack+0x1e6f/0x5cd0 net/ipv4/tcp_input.c:3967 tcp_rcv_established+0xe34/0x19f0 net/ipv4/tcp_input.c:6019 tcp_v4_do_rcv+0x446/0xa10 net/ipv4/tcp_ipv4.c:1683 sk_backlog_rcv include/net/sock.h:1131 [inline] __release_sock+0x154/0x380 net/core/sock.c:2945 release_sock+0x60/0x1c0 net/core/sock.c:3519 tcp_sendmsg+0x39/0x50 net/ipv4/tcp.c:1489 inet_sendmsg+0xb6/0xd0 net/ipv4/af_inet.c:841 sock_sendmsg_nosec net/socket.c:716 [inline] __sock_sendmsg net/socket.c:728 [inline] sock_write_iter+0x2ca/0x3b0 net/socket.c:1133 Memory state around the buggy address: ffff888128d1ab80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888128d1ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888128d1ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888128d1ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888128d1ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================