em28xx 5-1:0.103: Closing input extension em28xx 5-1:0.103: Freeing device ================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0xcc/0xf0 lib/list_debug.c:42 Read of size 8 at addr ffff88810e190258 by task kworker/1:7/7559 CPU: 1 PID: 7559 Comm: kworker/1:7 Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:436 __list_del_entry_valid+0xcc/0xf0 lib/list_debug.c:42 __list_del_entry include/linux/list.h:132 [inline] list_del include/linux/list.h:146 [inline] em28xx_close_extension+0x10b/0x2a0 drivers/media/usb/em28xx/em28xx-core.c:1146 em28xx_usb_disconnect.cold+0x14b/0x237 drivers/media/usb/em28xx/em28xx-cards.c:4140 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458 __device_release_driver+0x3bd/0x6f0 drivers/base/dd.c:1201 device_release_driver_internal drivers/base/dd.c:1232 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1255 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x502/0xd40 drivers/base/core.c:3540 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2221 hub_port_connect drivers/usb/core/hub.c:5151 [inline] hub_port_connect_change drivers/usb/core/hub.c:5440 [inline] port_event drivers/usb/core/hub.c:5586 [inline] hub_event+0x1c9c/0x4330 drivers/usb/core/hub.c:5668 process_one_work+0x98d/0x15b0 kernel/workqueue.c:2276 process_scheduled_works kernel/workqueue.c:2338 [inline] worker_thread+0x85c/0x11f0 kernel/workqueue.c:2424 kthread+0x3c0/0x4a0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the page: page:ffffea0004386400 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e190 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 ffffea00046b2f08 ffff8881f6954a10 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 2, migratetype Unmovable, gfp_mask 0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), pid 7559, ts 1357874969496, free_ts 1359445513284 prep_new_page mm/page_alloc.c:2433 [inline] get_page_from_freelist+0x11d2/0x28b0 mm/page_alloc.c:4166 __alloc_pages+0x1b2/0x4e0 mm/page_alloc.c:5374 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244 kmalloc_order+0x34/0xf0 mm/slab_common.c:955 kmalloc_order_trace+0x14/0x110 mm/slab_common.c:971 kmalloc_large include/linux/slab.h:520 [inline] kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:721 [inline] em28xx_usb_probe+0x1f7/0xd00 drivers/media/usb/em28xx/em28xx-cards.c:3855 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:517 [inline] really_probe+0x23c/0xcd0 drivers/base/dd.c:595 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:747 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:777 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:894 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x228/0x4a0 drivers/base/dd.c:965 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xc2f/0x2180 drivers/base/core.c:3352 usb_set_configuration+0x113f/0x1910 drivers/usb/core/message.c:2170 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1343 [inline] free_pcp_prepare+0x2b3/0x670 mm/page_alloc.c:1394 free_unref_page_prepare mm/page_alloc.c:3329 [inline] free_unref_page+0x19/0x490 mm/page_alloc.c:3408 __refcount_sub_and_test include/linux/refcount.h:282 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] kref_put.constprop.0.isra.0+0x3d/0x7e include/linux/kref.h:64 em28xx_ir_fini.cold+0x7c/0x120 drivers/media/usb/em28xx/em28xx-input.c:875 em28xx_close_extension+0xc9/0x2a0 drivers/media/usb/em28xx/em28xx-core.c:1143 em28xx_usb_disconnect.cold+0x14b/0x237 drivers/media/usb/em28xx/em28xx-cards.c:4140 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458 __device_release_driver+0x3bd/0x6f0 drivers/base/dd.c:1201 device_release_driver_internal drivers/base/dd.c:1232 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1255 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x502/0xd40 drivers/base/core.c:3540 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2221 hub_port_connect drivers/usb/core/hub.c:5151 [inline] hub_port_connect_change drivers/usb/core/hub.c:5440 [inline] port_event drivers/usb/core/hub.c:5586 [inline] hub_event+0x1c9c/0x4330 drivers/usb/core/hub.c:5668 process_one_work+0x98d/0x15b0 kernel/workqueue.c:2276 process_scheduled_works kernel/workqueue.c:2338 [inline] worker_thread+0x85c/0x11f0 kernel/workqueue.c:2424 Memory state around the buggy address: ffff88810e190100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88810e190180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88810e190200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88810e190280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88810e190300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================