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* KASAN: user-memory-access Read in hidraw_ioctl
@ 2019-07-30 12:28 syzbot
  2019-08-13 13:42 ` Andrey Konovalov
  0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2019-07-30 12:28 UTC (permalink / raw)
  To: andreyknvl, benjamin.tissoires, jikos, linux-input, linux-kernel,
	linux-usb, syzkaller-bugs


syzbot found the following crash on:

HEAD commit:    7f7867ff usb-fuzzer: main usb gadget fuzzer driver
git tree: usb-fuzzer
console output:
kernel config:
dashboard link:
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:

BUG: KASAN: user-memory-access in _copy_to_user+0x124/0x150  
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
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

This bug is generated by a bot. It may contain errors.
See for more information about syzbot.
syzbot engineers can be reached at

syzbot will keep track of this bug report. See: for how to communicate with syzbot.

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2019-07-30 12:28 KASAN: user-memory-access Read in hidraw_ioctl syzbot
2019-08-13 13:42 ` Andrey Konovalov

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