================================================================== BUG: KASAN: slab-out-of-bounds in mceusb_handle_command drivers/media/rc/mceusb.c:1146 [inline] BUG: KASAN: slab-out-of-bounds in mceusb_process_ir_data drivers/media/rc/mceusb.c:1238 [inline] BUG: KASAN: slab-out-of-bounds in mceusb_dev_recv+0x101e/0x12e0 drivers/media/rc/mceusb.c:1321 Read of size 1 at addr ffff8881ced70240 by task swapper/1/0 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #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+0xca/0x13e lib/dump_stack.c:113 print_address_description.constprop.0+0x36/0x50 mm/kasan/report.c:374 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:506 kasan_report+0xe/0x12 mm/kasan/common.c:634 mceusb_handle_command drivers/media/rc/mceusb.c:1146 [inline] mceusb_process_ir_data drivers/media/rc/mceusb.c:1238 [inline] mceusb_dev_recv+0x101e/0x12e0 drivers/media/rc/mceusb.c:1321 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1654 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1719 dummy_timer+0x120f/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1965 call_timer_fn+0x179/0x650 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1771 [inline] __run_timers kernel/time/timer.c:1738 [inline] run_timer_softirq+0x5e0/0x14d0 kernel/time/timer.c:1784 __do_softirq+0x221/0x912 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:default_idle+0x28/0x2e0 arch/x86/kernel/process.c:581 Code: 90 90 41 56 41 55 65 44 8b 2d f4 55 8e 7a 41 54 55 53 0f 1f 44 00 00 e8 56 2d d0 fb e9 07 00 00 00 0f 00 2d 2a fc 4e 00 fb f4 <65> 44 8b 2d d0 55 8e 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffff8881da217dc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff8881da1fb000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881da1fb84c RBP: ffffed103b43f600 R08: ffff8881da1fb000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x3b6/0x500 kernel/sched/idle.c:263 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:355 start_secondary+0x27d/0x330 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 Allocated by task 2746: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:510 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:483 kmalloc include/linux/slab.h:557 [inline] hcd_buffer_alloc+0x1ed/0x290 drivers/usb/core/buffer.c:132 usb_alloc_coherent+0x5d/0x80 drivers/usb/core/usb.c:910 mceusb_dev_probe+0x714/0x2f51 drivers/media/rc/mceusb.c:1674 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0xae6/0x16f0 drivers/base/core.c:2201 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0xae6/0x16f0 drivers/base/core.c:2201 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 12: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] kasan_set_free_info mm/kasan/common.c:332 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:471 slab_free_hook mm/slub.c:1424 [inline] slab_free_freelist_hook mm/slub.c:1475 [inline] slab_free mm/slub.c:3018 [inline] kfree+0xe4/0x2f0 mm/slub.c:3959 kobject_cleanup lib/kobject.c:693 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x171/0x280 lib/kobject.c:739 put_device drivers/base/core.c:2300 [inline] device_unregister+0x23/0x30 drivers/base/core.c:2408 usb_remove_ep_devs+0x3e/0x80 drivers/usb/core/endpoint.c:215 remove_intf_ep_devs+0x108/0x1d0 drivers/usb/core/message.c:1112 usb_disable_device+0x208/0x690 drivers/usb/core/message.c:1236 usb_disconnect+0x284/0x8d0 drivers/usb/core/hub.c:2199 hub_port_connect drivers/usb/core/hub.c:4949 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1454/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881ced70140 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff8881ced70140, ffff8881ced70240) The buggy address belongs to the page: page:ffffea00073b5c00 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0 flags: 0x200000000000200(slab) raw: 0200000000000200 ffffea000755f980 0000000300000003 ffff8881da002780 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ced70100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff8881ced70180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881ced70200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8881ced70280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881ced70300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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