From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: KASAN: slab-out-of-bounds Write in ga_probe Date: Mon, 16 Sep 2019 06:29:10 -0700 Message-ID: <000000000000cd1def0592ab9697@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Return-path: Sender: linux-kernel-owner@vger.kernel.org To: andreyknvl@google.com, benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com List-Id: linux-input@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: f0df5c1b usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=14045831600000 kernel config: https://syzkaller.appspot.com/x/.config?x=5c6633fa4ed00be5 dashboard link: https://syzkaller.appspot.com/bug?extid=403741a091bf41d4ae79 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c1e62d600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=166a3a95600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+403741a091bf41d4ae79@syzkaller.appspotmail.com usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 usb 1-1: New USB device found, idVendor=0e8f, idProduct=0012, bcdDevice= 0.00 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? greenasia 0003:0E8F:0012.0001: unknown main item tag 0x0 greenasia 0003:0E8F:0012.0001: hidraw0: USB HID v0.00 Device [HID 0e8f:0012] on usb-dummy_hcd.0-1/input0 ================================================================== BUG: KASAN: slab-out-of-bounds in set_bit include/asm-generic/bitops-instrumented.h:28 [inline] BUG: KASAN: slab-out-of-bounds in gaff_init drivers/hid/hid-gaff.c:97 [inline] BUG: KASAN: slab-out-of-bounds in ga_probe+0x1fd/0x6f0 drivers/hid/hid-gaff.c:146 Write of size 8 at addr ffff8881d9acafc0 by task kworker/1:1/78 CPU: 1 PID: 78 Comm: kworker/1:1 Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event 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:618 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x128/0x190 mm/kasan/generic.c:192 set_bit include/asm-generic/bitops-instrumented.h:28 [inline] gaff_init drivers/hid/hid-gaff.c:97 [inline] ga_probe+0x1fd/0x6f0 drivers/hid/hid-gaff.c:146 hid_device_probe+0x2be/0x3f0 drivers/hid/hid-core.c:2209 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 __device_attach_driver+0x --- 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@googlegroups.com. 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