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[209.85.220.69]) by mx.google.com with SMTPS id p2sor1273279ioj.63.2019.08.07.12.28.07 for (Google Transport Security); Wed, 07 Aug 2019 12:28:07 -0700 (PDT) Received-SPF: pass (google.com: domain of 3rizlxqkbak8hnozpaatgpeexs.vddvatjhtgrdcitci.rdb@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) client-ip=209.85.220.69; Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3rizlxqkbak8hnozpaatgpeexs.vddvatjhtgrdcitci.rdb@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3RiZLXQkbAK8hnoZPaaTgPeeXS.VddVaTjhTgRdciTci.Rdb@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com X-Google-Smtp-Source: APXvYqzWFAeV6uoAFycl78fTQ3T72cR+IUURMNDJiOnPKmxKVI2gfHSlCZd8ux2hugQqW/BL43kXyl7OoBmXBnR2biwXk5qdQOSr MIME-Version: 1.0 X-Received: by 2002:a02:9644:: with SMTP id c62mr6449158jai.45.1565206086834; Wed, 07 Aug 2019 12:28:06 -0700 (PDT) Date: Wed, 07 Aug 2019 12:28:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ce6527058f8bf0d0@google.com> Subject: BUG: bad usercopy in hidraw_ioctl From: syzbot To: allison@lohutok.net, andreyknvl@google.com, cai@lca.pw, gregkh@linuxfoundation.org, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, syzbot found the following crash on: HEAD commit: e96407b4 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=151b2926600000 kernel config: https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e dashboard link: https://syzkaller.appspot.com/bug?extid=3de312463756f656b47d compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+3de312463756f656b47d@syzkaller.appspotmail.com usercopy: Kernel memory exposure attempt detected from wrapped address (offset 0, size 0)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:98! invalid opcode: 0000 [#1] SMP KASAN CPU: 1 PID: 2968 Comm: syz-executor.1 Not tainted 5.3.0-rc2+ #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:usercopy_abort+0xb9/0xbb mm/usercopy.c:98 Code: e8 c1 f7 d6 ff 49 89 d9 4d 89 e8 4c 89 e1 41 56 48 89 ee 48 c7 c7 e0 f3 cd 85 ff 74 24 08 41 57 48 8b 54 24 20 e8 15 98 c1 ff <0f> 0b e8 95 f7 d6 ff e8 80 9f fd ff 8b 54 24 04 49 89 d8 4c 89 e1 RSP: 0018:ffff8881b0f37be8 EFLAGS: 00010282 RAX: 000000000000005a RBX: ffffffff85cdf100 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8128a0fd RDI: ffffed10361e6f6f RBP: ffffffff85cdf2c0 R08: 000000000000005a R09: ffffed103b665d58 R10: ffffed103b665d57 R11: ffff8881db32eabf R12: ffffffff85cdf460 R13: ffffffff85cdf100 R14: 0000000000000000 R15: ffffffff85cdf100 FS: 00007f539a2a9700(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000021237d0 CR3: 00000001d6ac6000 CR4: 00000000001406e0 Call Trace: check_bogus_address mm/usercopy.c:151 [inline] __check_object_size mm/usercopy.c:260 [inline] __check_object_size.cold+0xb2/0xba mm/usercopy.c:250 check_object_size include/linux/thread_info.h:119 [inline] check_copy_size include/linux/thread_info.h:150 [inline] copy_to_user include/linux/uaccess.h:151 [inline] hidraw_ioctl+0x38c/0xae0 drivers/hid/hidraw.c:392 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f539a2a8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000020000800 RSI: 0000000090044802 RDI: 0000000000000004 RBP: 000000000075c268 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f539a2a96d4 R13: 00000000004c21f3 R14: 00000000004d55b8 R15: 00000000ffffffff Modules linked in: ---[ end trace 24b9968555bf4653 ]--- RIP: 0010:usercopy_abort+0xb9/0xbb mm/usercopy.c:98 Code: e8 c1 f7 d6 ff 49 89 d9 4d 89 e8 4c 89 e1 41 56 48 89 ee 48 c7 c7 e0 f3 cd 85 ff 74 24 08 41 57 48 8b 54 24 20 e8 15 98 c1 ff <0f> 0b e8 95 f7 d6 ff e8 80 9f fd ff 8b 54 24 04 49 89 d8 4c 89 e1 RSP: 0018:ffff8881b0f37be8 EFLAGS: 00010282 RAX: 000000000000005a RBX: ffffffff85cdf100 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8128a0fd RDI: ffffed10361e6f6f RBP: ffffffff85cdf2c0 R08: 000000000000005a R09: ffffed103b665d58 R10: ffffed103b665d57 R11: ffff8881db32eabf R12: ffffffff85cdf460 R13: ffffffff85cdf100 R14: 0000000000000000 R15: ffffffff85cdf100 FS: 00007f539a2a9700(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000021237d0 CR3: 00000001d6ac6000 CR4: 00000000001406e0 --- 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.