Re: INFO: trying to register non-static key in usbtouch_open

[Andrey Konovalov]

On Tue, Jul 23, 2019 at 2:48 PM syzbot
<syzbot+f9c21a30eb9d374e30c1@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    6a3599ce 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=16330920600000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=700ca426ab83faae
> dashboard link: https://syzkaller.appspot.com/bug?extid=f9c21a30eb9d374e30c1
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17e5ee78600000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10e4a74c600000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+f9c21a30eb9d374e30c1@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> INFO: trying to register non-static key.
> the code is fine but needs lockdep annotation.
> turning off the locking correctness validator.
> CPU: 0 PID: 1737 Comm: syz-executor481 Not tainted 5.2.0-rc6+ #15
> 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
>   assign_lock_key /kernel/locking/lockdep.c:775 [inline]
>   register_lock_class+0x11ae/0x1240 /kernel/locking/lockdep.c:1084
>   __lock_acquire+0x11d/0x5340 /kernel/locking/lockdep.c:3674
>   lock_acquire+0x100/0x2b0 /kernel/locking/lockdep.c:4303
>   __mutex_lock_common /kernel/locking/mutex.c:926 [inline]
>   __mutex_lock+0xf9/0x12b0 /kernel/locking/mutex.c:1073
>   usbtouch_open+0x101/0x310 /drivers/input/touchscreen/usbtouchscreen.c:1537
>   input_open_device+0x170/0x280 /drivers/input/input.c:607
>   evdev_open_device /drivers/input/evdev.c:433 [inline]
>   evdev_open+0x3fe/0x510 /drivers/input/evdev.c:518
>   chrdev_open+0x219/0x5c0 /fs/char_dev.c:413
>   do_dentry_open+0x497/0x1040 /fs/open.c:778
>   do_last /fs/namei.c:3416 [inline]
>   path_openat+0x1430/0x3ff0 /fs/namei.c:3533
>   do_filp_open+0x1a1/0x280 /fs/namei.c:3563
>   do_sys_open+0x3c0/0x580 /fs/open.c:1070
>   do_syscall_64+0xb7/0x560 /arch/x86/entry/common.c:301
>   entry_SYSCALL_64_after_hwframe+0x49/0xbe
> RIP: 0033:0x4011f0
> Code: 01 f0 ff ff 0f 83 00 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f
> 44 00 00 83 3d 9d 4b 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff
> ff 0f 83 d4 0a 00 00 c3 48 83 ec 08 e8 3a 00 00 00
> RSP: 002b:00007ffdc8662728 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004011f0
> RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffdc8662730
> RBP: 6666666666666667 R08: 000000000000000f R09: 0000000000000023
> R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000402150
> R13: 00000000004021e0 R14: 0000000000000000 R15: 0000000000000000

#syz dup: WARNING in usbtouch_open

>
>
> ---
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