usblp0: nonzero read bulk status received: -71 ================================================================== BUG: KASAN: use-after-free in instrument_atomic_write include/linux/instrumented.h:71 [inline] BUG: KASAN: use-after-free in atomic_dec include/asm-generic/atomic-instrumented.h:330 [inline] BUG: KASAN: use-after-free in usb_anchor_resume_wakeups+0x2c/0xe0 drivers/usb/core/urb.c:907 Write of size 4 at addr ffff8881d9444218 by task systemd-udevd/123 CPU: 1 PID: 123 Comm: systemd-udevd Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xf6/0x16e lib/dump_stack.c:118 print_address_description.constprop.0+0x1a/0x210 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x37/0x7c mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0xf4/0x1c0 mm/kasan/generic.c:192 instrument_atomic_write include/linux/instrumented.h:71 [inline] atomic_dec include/asm-generic/atomic-instrumented.h:330 [inline] usb_anchor_resume_wakeups+0x2c/0xe0 drivers/usb/core/urb.c:907 __usb_hcd_giveback_urb+0x33a/0x560 drivers/usb/core/hcd.c:1653 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1716 dummy_timer+0x11f2/0x3240 drivers/usb/gadget/udc/dummy_hcd.c:1967 call_timer_fn+0x1ac/0x6e0 kernel/time/timer.c:1415 expire_timers kernel/time/timer.c:1460 [inline] __run_timers.part.0+0x54c/0x9e0 kernel/time/timer.c:1784 __run_timers kernel/time/timer.c:1756 [inline] run_timer_softirq+0x80/0x120 kernel/time/timer.c:1797 __do_softirq+0x222/0x95b kernel/softirq.c:292 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0xed/0x140 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:387 [inline] __irq_exit_rcu kernel/softirq.c:417 [inline] irq_exit_rcu+0x150/0x1f0 kernel/softirq.c:429 sysvec_apic_timer_interrupt+0x49/0xc0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:162 [inline] RIP: 0010:unwind_next_frame+0x1fe/0x1f60 arch/x86/kernel/unwind_orc.c:446 Code: 43 ff 39 c6 0f 83 fb 10 00 00 48 b8 00 00 00 00 00 fc ff df 89 f2 48 8d 3c 95 b8 bc b0 88 49 89 f8 49 c1 e8 03 45 0f b6 04 00 <48> 89 f8 83 e0 07 83 c0 03 44 38 c0 7c 09 45 84 c0 0f 85 2f 15 00 RSP: 0018:ffff8881d07ff5d0 EFLAGS: 00000a02 RAX: dffffc0000000000 RBX: ffff8881d07ff6a8 RCX: ffffffff816934d1 RDX: 0000000000006934 RSI: 0000000000006934 RDI: ffffffff88b26188 RBP: 1ffff1103a0ffec2 R08: 0000000000000000 R09: ffffffff885a8b84 R10: 000000000001d5c9 R11: 000000000004e017 R12: ffff8881d07ff6f0 R13: ffff8881d07ff6dd R14: ffff8881d07ff6f8 R15: 0000000000000001 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc_node mm/slub.c:2824 [inline] slab_alloc mm/slub.c:2832 [inline] kmem_cache_alloc+0xd2/0x310 mm/slub.c:2837 vm_area_dup+0x1c/0x1d0 kernel/fork.c:359 dup_mmap kernel/fork.c:548 [inline] dup_mm+0x44d/0x1110 kernel/fork.c:1371 copy_mm kernel/fork.c:1427 [inline] copy_process+0x27eb/0x63b0 kernel/fork.c:2098 _do_fork+0x12c/0xa30 kernel/fork.c:2443 __do_sys_clone+0xef/0x150 kernel/fork.c:2599 do_syscall_64+0x50/0x90 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7ff5ffed938b Code: Bad RIP value. RSP: 002b:00007ffc809ae510 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc809ae510 RCX: 00007ff5ffed938b RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc809ae560 R08: 00007ff6010898c0 R09: 0000000000000210 R10: 00007ff601089b90 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 3331: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 kmalloc include/linux/slab.h:555 [inline] kzalloc include/linux/slab.h:669 [inline] usblp_probe+0xed/0x11f0 drivers/usb/class/usblp.c:1105 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:374 really_probe+0x291/0xc90 drivers/base/dd.c:520 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:696 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:802 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x430 drivers/base/dd.c:868 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xb09/0x1c10 drivers/base/core.c:2700 usb_set_configuration+0xf05/0x18a0 drivers/usb/core/message.c:2032 usb_generic_driver_probe+0xba/0xf2 drivers/usb/core/generic.c:241 usb_probe_device+0xd9/0x250 drivers/usb/core/driver.c:272 really_probe+0x291/0xc90 drivers/base/dd.c:520 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:696 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:802 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x430 drivers/base/dd.c:868 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xb09/0x1c10 drivers/base/core.c:2700 usb_new_device.cold+0x71d/0xfd4 drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5208 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x2361/0x4390 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x82b/0x1120 kernel/workqueue.c:2417 kthread+0x392/0x470 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Freed by task 3114: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] kasan_set_free_info mm/kasan/common.c:316 [inline] __kasan_slab_free+0x116/0x160 mm/kasan/common.c:455 slab_free_hook mm/slub.c:1474 [inline] slab_free_freelist_hook+0x53/0x140 mm/slub.c:1507 slab_free mm/slub.c:3072 [inline] kfree+0xbc/0x2c0 mm/slub.c:4052 usblp_disconnect.cold+0x24/0x29 drivers/usb/class/usblp.c:1382 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:436 __device_release_driver+0x3b7/0x6e0 drivers/base/dd.c:1108 device_release_driver_internal drivers/base/dd.c:1139 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1162 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533 device_del+0x47c/0xd20 drivers/base/core.c:2877 usb_disable_device+0x387/0x930 drivers/usb/core/message.c:1245 usb_disconnect.cold+0x27d/0x780 drivers/usb/core/hub.c:2217 hub_port_connect drivers/usb/core/hub.c:5059 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x1c93/0x4390 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x392/0x470 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 The buggy address belongs to the object at ffff8881d9444000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 536 bytes inside of 1024-byte region [ffff8881d9444000, ffff8881d9444400) The buggy address belongs to the page: page:ffffea0007651000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea0007651000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 ffffea000716be00 0000000300000003 ffff8881da002280 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d9444100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d9444180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881d9444200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d9444280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d9444300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================