On Mon, Dec 9, 2019 at 12:05 PM syzbot <syzbot+aed9115d05783f14777a@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 1f22d15c usb: gadget: add raw-gadget interface > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=13c9bb7ae00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8ccee2968018adcb > dashboard link: https://syzkaller.appspot.com/bug?extid=aed9115d05783f14777a > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13145c2ee00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17dca1eae00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+aed9115d05783f14777a@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================== > BUG: KASAN: slab-out-of-bounds in clear_bit > include/asm-generic/bitops-instrumented.h:56 [inline] > BUG: KASAN: slab-out-of-bounds in hidinput_setkeycode+0x16e/0x390 > drivers/hid/hid-input.c:165 > Write of size 8 at addr ffff8881cf9649e8 by task syz-executor105/1717 > > CPU: 1 PID: 1717 Comm: syz-executor105 Not tainted 5.4.0-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+0xef/0x16e lib/dump_stack.c:118 > 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/0x20 mm/kasan/common.c:638 > check_memory_region_inline mm/kasan/generic.c:185 [inline] > check_memory_region+0x128/0x190 mm/kasan/generic.c:192 > clear_bit include/asm-generic/bitops-instrumented.h:56 [inline] > hidinput_setkeycode+0x16e/0x390 drivers/hid/hid-input.c:165 > input_set_keycode+0x104/0x320 drivers/input/input.c:935 > evdev_handle_set_keycode_v2+0xc4/0x120 drivers/input/evdev.c:882 > evdev_do_ioctl drivers/input/evdev.c:1150 [inline] > evdev_ioctl_handler+0xd49/0x19f0 drivers/input/evdev.c:1284 > vfs_ioctl fs/ioctl.c:47 [inline] > file_ioctl fs/ioctl.c:539 [inline] > do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:726 > ksys_ioctl+0x9b/0xc0 fs/ioctl.c:743 > __do_sys_ioctl fs/ioctl.c:750 [inline] > __se_sys_ioctl fs/ioctl.c:748 [inline] > __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:748 > do_syscall_64+0xb7/0x5b0 arch/x86/entry/common.c:294 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x446d59 > Code: e8 2c ae 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 > 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff > ff 0f 83 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007ffd75eec118 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007ffd75eec120 RCX: 0000000000446d59 > RDX: 0000000020000080 RSI: 0000000040284504 RDI: 0000000000000005 > RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000004029f0 > R10: 00007ffd75eebc70 R11: 0000000000000246 R12: 0000000000404a00 > R13: 0000000000404a90 R14: 0000000000000000 R15: 0000000000000000 > > Allocated by task 12: > save_stack+0x1b/0x80 mm/kasan/common.c:71 > set_track mm/kasan/common.c:79 [inline] > __kasan_kmalloc mm/kasan/common.c:512 [inline] > __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:485 > kmalloc include/linux/slab.h:556 [inline] > kzalloc include/linux/slab.h:670 [inline] > input_allocate_device+0x3e/0x260 drivers/input/input.c:1810 > hidinput_allocate drivers/hid/hid-input.c:1654 [inline] > hidinput_connect+0x3cab/0xdb90 drivers/hid/hid-input.c:1899 > hid_connect+0x965/0xbb0 drivers/hid/hid-core.c:1923 > hid_hw_start drivers/hid/hid-core.c:2027 [inline] > hid_hw_start+0xa2/0x130 drivers/hid/hid-core.c:2018 > ms_probe+0x159/0x4d0 drivers/hid/hid-microsoft.c:394 > hid_device_probe+0x2be/0x3f0 drivers/hid/hid-core.c:2255 > 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+0x1480/0x1c20 drivers/base/core.c:2487 > hid_add_device drivers/hid/hid-core.c:2411 [inline] > hid_add_device+0x33c/0x9a0 drivers/hid/hid-core.c:2360 > usbhid_probe+0xa81/0xfa0 drivers/hid/usbhid/hid-core.c:1386 > 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+0x1480/0x1c20 drivers/base/core.c:2487 > usb_set_configuration+0xe67/0x1740 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+0x1480/0x1c20 drivers/base/core.c:2487 > usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2537 > hub_port_connect drivers/usb/core/hub.c:5184 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5324 [inline] > port_event drivers/usb/core/hub.c:5470 [inline] > hub_event+0x1e59/0x3860 drivers/usb/core/hub.c:5552 > process_one_work+0x92b/0x1530 kernel/workqueue.c:2264 > process_scheduled_works kernel/workqueue.c:2326 [inline] > worker_thread+0x7ab/0xe20 kernel/workqueue.c:2412 > 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 ffff8881cf964000 > which belongs to the cache kmalloc-2k of size 2048 > The buggy address is located 488 bytes to the right of > 2048-byte region [ffff8881cf964000, ffff8881cf964800) > The buggy address belongs to the page: > page:ffffea00073e5800 refcount:1 mapcount:0 mapping:ffff8881da40c000 > index:0x0 compound_mapcount: 0 > raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da40c000 > raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 > page dumped because: kasan: bad access detected > > Memory state around the buggy address: > ffff8881cf964880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8881cf964900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > > ffff8881cf964980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ^ > ffff8881cf964a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8881cf964a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ================================================================== > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches #syz dup: KASAN: global-out-of-bounds Write in kbd_event
