On Tue, Jul 30, 2019 at 2:28 PM syzbot <syzbot+5a8c44432a51154ff6d5@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 7f7867ff 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=13c21ab4600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=792eb47789f57810 > dashboard link: https://syzkaller.appspot.com/bug?extid=5a8c44432a51154ff6d5 > 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+5a8c44432a51154ff6d5@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================== > BUG: KASAN: user-memory-access in _copy_to_user+0x124/0x150 > lib/usercopy.c:27 > Read of size 148 at addr 0000100000000000 by task syz-executor.2/19576 > > CPU: 1 PID: 19576 Comm: syz-executor.2 Not tainted 5.3.0-rc2+ #23 > 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 > __kasan_report.cold+0x5/0x33 mm/kasan/report.c:486 > kasan_report+0xe/0x12 mm/kasan/common.c:612 > check_memory_region_inline mm/kasan/generic.c:185 [inline] > check_memory_region+0x128/0x190 mm/kasan/generic.c:192 > _copy_to_user+0x124/0x150 lib/usercopy.c:27 > copy_to_user include/linux/uaccess.h:152 [inline] > hidraw_ioctl+0x39c/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:00007f6587cfbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 > RDX: 0000000020005640 RSI: 0000000090044802 RDI: 0000000000000004 > RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6587cfc6d4 > R13: 00000000004c21db R14: 00000000004d5540 R15: 00000000ffffffff > ================================================================== #syz dup: BUG: bad usercopy in hidraw_ioctl > > > --- > 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.
