Re: [syzbot] UBSAN: shift-out-of-bounds in profile_init

[Pavel Skripkin]

 On Wed, 14 Jul 2021 05:47:21 -0700
syzbot <syzbot+e68c89a9510c159d9684@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    3dbdb38e Merge branch 'for-5.14' of
> git://git.kernel.org/p.. git tree:       upstream
> console output:
> https://syzkaller.appspot.com/x/log.txt?x=11342328300000 kernel
> config:  https://syzkaller.appspot.com/x/.config?x=a1fcf15a09815757
> dashboard link:
> https://syzkaller.appspot.com/bug?extid=e68c89a9510c159d9684 syz
> repro:
> https://syzkaller.appspot.com/x/repro.syz?x=149a96d2300000 C
> reproducer:   https://syzkaller.appspot.com/x/repro.c?x=114e5bc4300000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the
> commit: Reported-by:
> syzbot+e68c89a9510c159d9684@xxxxxxxxxxxxxxxxxxxxxxxxx
> 

With clamp() call suggested by Tetsuo

#syz test
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master



With regards,
Pavel Skripkin