Re: WARNING: Support for this device (Terratec Grabster AV400) is experimental.

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On Tue, 30 Apr 2019, syzbot wrote:

> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    9a33b369 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=141ca62d200000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=23e37f59d94ddd15
> dashboard link: https://syzkaller.appspot.com/bug?extid=af8f8d2ac0d39b0ed3a0
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1405bedd200000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13ce3bbb200000
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+af8f8d2ac0d39b0ed3a0@xxxxxxxxxxxxxxxxxxxxxxxxx
> 
> usb 1-1: New USB device found, idVendor=0ccd, idProduct=0039, bcdDevice=  
> d.3c
> usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
> usb 1-1: config 0 descriptor??
> pvrusb2: Hardware description: Terratec Grabster AV400
> pvrusb2: **********
> pvrusb2: WARNING: Support for this device (Terratec Grabster AV400) is  
> experimental.
> pvrusb2: Important functionality might not be entirely working.
> pvrusb2: Please consider contacting the driver author to help with further  
> stabilization of the driver.
> pvrusb2: **********
> 
> 
> ---
> 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.

This does seem like a bug in syzbot.  Why does it think this pr_info() 
output indicates a crash?  Is it fooled by the capitalized "WARNING" at 
the start of one of the lines?

Alan Stern




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