================================================================== 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 ffff8881c68c5880 by task ps/3186 CPU: 1 PID: 3186 Comm: ps 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:phys_addr_valid arch/x86/mm/physaddr.h:7 [inline] RIP: 0010:__virt_addr_valid+0x80/0x2c0 arch/x86/mm/physaddr.c:60 Code: 0f 82 a1 01 00 00 e8 1f b0 2c 00 48 c7 c0 c9 68 aa 87 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 0f b6 14 11 <38> c2 7f 08 84 d2 0f 85 cf 01 00 00 0f b6 0d 16 dc 98 06 48 89 dd RSP: 0018:ffff8881c5eb7d58 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 00000001d2904420 RCX: 1ffffffff0f54d19 RDX: 0000000000000000 RSI: ffffffff81118c81 RDI: 0000000000000006 RBP: ffff888252904420 R08: ffff8881d988c800 R09: 0000000000000000 R10: ffffed103a520a7f R11: ffff8881d29053ff R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000fe0 R15: 00007ffffffff000 check_heap_object mm/usercopy.c:227 [inline] __check_object_size mm/usercopy.c:280 [inline] __check_object_size+0xc4/0x39a mm/usercopy.c:250 check_object_size include/linux/thread_info.h:119 [inline] strncpy_from_user+0x9f/0x3f0 lib/strncpy_from_user.c:117 getname_flags fs/namei.c:149 [inline] getname_flags+0x117/0x5b0 fs/namei.c:128 do_sys_open+0x294/0x580 fs/open.c:1091 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f28a443f120 Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24 RSP: 002b:00007fff9b3a7b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000616760 RCX: 00007f28a443f120 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f28a490dd00 RBP: 0000000000001000 R08: 0000000000000000 R09: 00007f28a470757b R10: 0000000000000000 R11: 0000000000000246 R12: 00007f28a490cd00 R13: 0000000000000020 R14: 0000000000000005 R15: 0000000000000000 Allocated by task 2753: 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 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 0: (stack is not available) The buggy address belongs to the object at ffff8881c68c5780 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff8881c68c5780, ffff8881c68c5880) The buggy address belongs to the page: page:ffffea00071a3140 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0 flags: 0x200000000000200(slab) raw: 0200000000000200 dead000000000100 dead000000000122 ffff8881da002780 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c68c5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881c68c5800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881c68c5880: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8881c68c5900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881c68c5980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================