sr 2:0:0:0: Attached scsi generic sg1 type 5 vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device ================================================================== BUG: KASAN: slab-use-after-free in __wake_up_common+0x17f/0x1f0 kernel/sched/wait.c:104 Read of size 8 at addr ffff888020065608 by task kworker/u32:2/42 CPU: 3 UID: 0 PID: 42 Comm: kworker/u32:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: usbip_event event_handler Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595 __wake_up_common+0x17f/0x1f0 kernel/sched/wait.c:104 __wake_up_common_lock kernel/sched/wait.c:125 [inline] __wake_up+0x31/0x60 kernel/sched/wait.c:146 event_handler+0x37b/0x540 drivers/usb/usbip/usbip_event.c:96 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 1: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:400 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417 kasan_kmalloc include/linux/kasan.h:262 [inline] __do_kmalloc_node mm/slub.c:5642 [inline] __kmalloc_noprof+0x32f/0x880 mm/slub.c:5654 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] __usb_create_hcd+0x5b/0xa70 drivers/usb/core/hcd.c:2570 vhci_hcd_probe+0xf3/0x490 drivers/usb/usbip/vhci_hcd.c:1374 platform_probe+0x106/0x1d0 drivers/base/platform.c:1405 call_driver_probe drivers/base/dd.c:581 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1031 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x1148/0x1aa0 drivers/base/core.c:3689 platform_device_add+0x316/0x810 drivers/base/platform.c:716 platform_device_register_full+0x485/0x630 drivers/base/platform.c:844 vhci_hcd_init+0x1da/0x3b0 drivers/usb/usbip/vhci_hcd.c:1555 do_one_initcall+0x123/0x6e0 init/main.c:1283 do_initcall_level init/main.c:1345 [inline] do_initcalls init/main.c:1361 [inline] do_basic_setup init/main.c:1380 [inline] kernel_init_freeable+0x5c8/0x920 init/main.c:1593 kernel_init+0x1c/0x2b0 init/main.c:1483 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 1: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 __kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2539 [inline] slab_free mm/slub.c:6630 [inline] kfree+0x2b8/0x6d0 mm/slub.c:6837 hcd_release drivers/usb/core/hcd.c:2696 [inline] kref_put include/linux/kref.h:65 [inline] usb_put_hcd drivers/usb/core/hcd.c:2710 [inline] usb_put_hcd+0x13f/0x1d0 drivers/usb/core/hcd.c:2707 vhci_hcd_probe+0x30e/0x490 drivers/usb/usbip/vhci_hcd.c:1413 platform_probe+0x106/0x1d0 drivers/base/platform.c:1405 call_driver_probe drivers/base/dd.c:581 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1031 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x1148/0x1aa0 drivers/base/core.c:3689 platform_device_add+0x316/0x810 drivers/base/platform.c:716 platform_device_register_full+0x485/0x630 drivers/base/platform.c:844 vhci_hcd_init+0x1da/0x3b0 drivers/usb/usbip/vhci_hcd.c:1555 do_one_initcall+0x123/0x6e0 init/main.c:1283 do_initcall_level init/main.c:1345 [inline] do_initcalls init/main.c:1361 [inline] do_basic_setup init/main.c:1380 [inline] kernel_init_freeable+0x5c8/0x920 init/main.c:1593 kernel_init+0x1c/0x2b0 init/main.c:1483 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:559 insert_work+0x36/0x230 kernel/workqueue.c:2186 __queue_work+0x97e/0x1160 kernel/workqueue.c:2341 queue_work_on+0x15f/0x1f0 kernel/workqueue.c:2392 queue_work include/linux/workqueue.h:669 [inline] usb_hcd_giveback_urb+0x330/0x450 drivers/usb/core/hcd.c:1762 usb_rh_urb_dequeue drivers/usb/core/hcd.c:849 [inline] unlink1+0x439/0x540 drivers/usb/core/hcd.c:1584 usb_hcd_unlink_urb+0x131/0x1f0 drivers/usb/core/hcd.c:1621 usb_kill_urb drivers/usb/core/urb.c:717 [inline] usb_kill_urb+0x121/0x320 drivers/usb/core/urb.c:704 hub_quiesce+0x1ea/0x320 drivers/usb/core/hub.c:1416 hub_suspend+0x541/0xa80 drivers/usb/core/hub.c:4007 usb_suspend_interface drivers/usb/core/driver.c:1323 [inline] usb_suspend_both+0x302/0xc70 drivers/usb/core/driver.c:1445 usb_runtime_suspend+0x49/0x180 drivers/usb/core/driver.c:1997 __rpm_callback+0xc8/0x610 drivers/base/power/runtime.c:406 rpm_callback+0x1b7/0x200 drivers/base/power/runtime.c:460 rpm_suspend+0x2e1/0x11d0 drivers/base/power/runtime.c:698 __pm_runtime_suspend+0xba/0x1a0 drivers/base/power/runtime.c:1167 pm_runtime_put_sync_autosuspend include/linux/pm_runtime.h:728 [inline] usb_new_device+0x1025/0x1a60 drivers/usb/core/hub.c:2726 register_root_hub+0x299/0x730 drivers/usb/core/hcd.c:994 usb_add_hcd+0xaf2/0x1730 drivers/usb/core/hcd.c:2993 vhci_hcd_probe+0x14b/0x490 drivers/usb/usbip/vhci_hcd.c:1385 platform_probe+0x106/0x1d0 drivers/base/platform.c:1405 call_driver_probe drivers/base/dd.c:581 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:659 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:959 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1031 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x1148/0x1aa0 drivers/base/core.c:3689 platform_device_add+0x316/0x810 drivers/base/platform.c:716 platform_device_register_full+0x485/0x630 drivers/base/platform.c:844 vhci_hcd_init+0x1da/0x3b0 drivers/usb/usbip/vhci_hcd.c:1555 do_one_initcall+0x123/0x6e0 init/main.c:1283 do_initcall_level init/main.c:1345 [inline] do_initcalls init/main.c:1361 [inline] do_basic_setup init/main.c:1380 [inline] kernel_init_freeable+0x5c8/0x920 init/main.c:1593 kernel_init+0x1c/0x2b0 init/main.c:1483 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Second to last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:559 insert_work+0x36/0x230 kernel/workqueue.c:2186 __queue_work+0x97e/0x1160 kernel/workqueue.c:2341 queue_work_on+0x15f/0x1f0 kernel/workqueue.c:2392 queue_work include/linux/workqueue.h:669 [inline] usb_hcd_giveback_urb+0x38c/0x450 drivers/usb/core/hcd.c:1764 rh_call_control drivers/usb/core/hcd.c:711 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:821 [inline] usb_hcd_submit_urb+0xb73/0x1c60 drivers/usb/core/hcd.c:1542 usb_submit_urb+0x89f/0x1990 drivers/usb/core/urb.c:587 usb_start_wait_urb+0x104/0x4b0 drivers/usb/core/message.c:59 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154 get_port_status drivers/usb/core/hub.c:611 [inline] hub_ext_port_status+0x14e/0x670 drivers/usb/core/hub.c:628 usb_hub_port_status drivers/usb/core/hub.c:678 [inline] hub_activate+0x6e5/0x1d60 drivers/usb/core/hub.c:1189 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888020064000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 5640 bytes inside of freed 8192-byte region [ffff888020064000, ffff888020066000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20060 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801b443180 ffffea0000930a00 0000000000000003 raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801b443180 ffffea0000930a00 0000000000000003 head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 00fff00000000003 ffffea0000801801 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 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 1, tgid 1 (swapper/0), ts 18941831394, free_ts 18869762601 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3055 [inline] allocate_slab mm/slub.c:3228 [inline] new_slab+0x24a/0x360 mm/slub.c:3282 ___slab_alloc+0xdae/0x1a60 mm/slub.c:4651 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4770 __slab_alloc_node mm/slub.c:4846 [inline] slab_alloc_node mm/slub.c:5268 [inline] __do_kmalloc_node mm/slub.c:5641 [inline] __kmalloc_noprof+0x501/0x880 mm/slub.c:5654 kmalloc_noprof include/linux/slab.h:961 [inline] kmalloc_array_noprof include/linux/slab.h:1003 [inline] fb_show_logo_line drivers/video/fbdev/core/fb_logo.c:313 [inline] fb_show_logo+0x1133/0x23e0 drivers/video/fbdev/core/fb_logo.c:502 fbcon_switch+0xfc6/0x1420 drivers/video/fbdev/core/fbcon.c:2208 redraw_screen+0x2c1/0x760 drivers/tty/vt/vt.c:966 con2fb_init_display drivers/video/fbdev/core/fbcon.c:834 [inline] set_con2fb_map+0x7aa/0x1080 drivers/video/fbdev/core/fbcon.c:895 do_fb_registered drivers/video/fbdev/core/fbcon.c:3031 [inline] fbcon_fb_registered+0x21d/0x6a0 drivers/video/fbdev/core/fbcon.c:3047 do_register_framebuffer+0x512/0x8a0 drivers/video/fbdev/core/fbmem.c:512 register_framebuffer+0x23/0x40 drivers/video/fbdev/core/fbmem.c:579 __drm_fb_helper_initial_config_and_unlock+0xdb7/0x17b0 drivers/gpu/drm/drm_fb_helper.c:1852 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906 discard_slab mm/slub.c:3326 [inline] __put_partials+0x130/0x170 mm/slub.c:3872 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4970 [inline] slab_alloc_node mm/slub.c:5280 [inline] __do_kmalloc_node mm/slub.c:5641 [inline] __kmalloc_noprof+0x2e8/0x880 mm/slub.c:5654 kmalloc_noprof include/linux/slab.h:961 [inline] kmalloc_array_noprof include/linux/slab.h:1003 [inline] fb_show_logo_line drivers/video/fbdev/core/fb_logo.c:313 [inline] fb_show_logo+0x1133/0x23e0 drivers/video/fbdev/core/fb_logo.c:502 fbcon_switch+0xfc6/0x1420 drivers/video/fbdev/core/fbcon.c:2208 redraw_screen+0x2c1/0x760 drivers/tty/vt/vt.c:966 con2fb_init_display drivers/video/fbdev/core/fbcon.c:834 [inline] set_con2fb_map+0x7aa/0x1080 drivers/video/fbdev/core/fbcon.c:895 do_fb_registered drivers/video/fbdev/core/fbcon.c:3031 [inline] fbcon_fb_registered+0x21d/0x6a0 drivers/video/fbdev/core/fbcon.c:3047 do_register_framebuffer+0x512/0x8a0 drivers/video/fbdev/core/fbmem.c:512 register_framebuffer+0x23/0x40 drivers/video/fbdev/core/fbmem.c:579 __drm_fb_helper_initial_config_and_unlock+0xdb7/0x17b0 drivers/gpu/drm/drm_fb_helper.c:1852 drm_fb_helper_initial_config drivers/gpu/drm/drm_fb_helper.c:1917 [inline] drm_fb_helper_initial_config+0x44/0x60 drivers/gpu/drm/drm_fb_helper.c:1909 drm_fbdev_client_hotplug+0x1a6/0x280 drivers/gpu/drm/clients/drm_fbdev_client.c:52 Memory state around the buggy address: ffff888020065500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888020065580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888020065600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888020065680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888020065700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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