================================================================== BUG: KASAN: slab-out-of-bounds in mceusb_handle_command drivers/media/rc/mceusb.c:1081 [inline] BUG: KASAN: slab-out-of-bounds in mceusb_process_ir_data drivers/media/rc/mceusb.c:1171 [inline] BUG: KASAN: slab-out-of-bounds in mceusb_dev_recv+0x1028/0x12e0 drivers/media/rc/mceusb.c:1254 Read of size 1 at addr ffff8881d5178c40 by task swapper/0/0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc5+ #28 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+0x6a/0x32c mm/kasan/report.c:351 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:612 mceusb_handle_command drivers/media/rc/mceusb.c:1081 [inline] mceusb_process_ir_data drivers/media/rc/mceusb.c:1171 [inline] mceusb_dev_recv+0x1028/0x12e0 drivers/media/rc/mceusb.c:1254 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1722 dummy_timer+0x120f/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1965 call_timer_fn+0x179/0x650 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x5cc/0x14b0 kernel/time/timer.c:1698 __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:537 [inline] smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1095 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 64 fa 93 7a 41 54 55 53 0f 1f 44 00 00 e8 96 6a d5 fb e9 07 00 00 00 0f 00 2d 3a a0 54 00 fb f4 <65> 44 8b 2d 40 fa 93 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffffff86c07da8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffffffff86c2b200 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffffff86c2ba44 RBP: fffffbfff0d85640 R08: ffffffff86c2b200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x3c2/0x4f0 kernel/sched/idle.c:263 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:354 start_kernel+0x838/0x872 init/main.c:785 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 Allocated by task 12: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:487 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:460 kmalloc include/linux/slab.h:557 [inline] hcd_buffer_alloc+0x1bf/0x260 drivers/usb/core/buffer.c:132 usb_alloc_coherent+0x5d/0x80 drivers/usb/core/usb.c:910 mceusb_dev_probe+0x714/0x2f20 drivers/media/rc/mceusb.c:1576 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 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:454 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2165 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+0x101/0x1b0 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:454 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2165 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 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 1: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:449 slab_free_hook mm/slub.c:1423 [inline] slab_free_freelist_hook mm/slub.c:1474 [inline] slab_free mm/slub.c:3016 [inline] kfree+0xe4/0x2f0 mm/slub.c:3957 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 bus_remove_driver+0x125/0x22a drivers/base/bus.c:704 driver_unregister+0x73/0xb0 drivers/base/driver.c:197 eeepc_laptop_init+0x8c/0x98 drivers/platform/x86/eeepc-laptop.c:1502 do_one_initcall+0xf0/0x614 init/main.c:939 do_initcall_level init/main.c:1007 [inline] do_initcalls init/main.c:1015 [inline] do_basic_setup init/main.c:1032 [inline] kernel_init_freeable+0x4a9/0x596 init/main.c:1192 kernel_init+0xd/0x1bf init/main.c:1110 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881d5178b40 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff8881d5178b40, ffff8881d5178c40) The buggy address belongs to the page: page:ffffea0007545e00 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0 flags: 0x200000000000200(slab) raw: 0200000000000200 ffffea00075590c0 0000000a0000000a ffff8881da002780 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d5178b00: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff8881d5178b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881d5178c00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8881d5178c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881d5178d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================