Re: [Announce] Strace Test

[Andrew Morton]

Nikita Danilov <Nikita@xxxxxxxxxxx> wrote:
>
>  Andrew Morton writes:
>   > Nikita Danilov <Nikita@xxxxxxxxxxx> wrote:
>   > >
>   > >  > Strace Test uses a modified version of strace 4.5.1.  
>   > >   > Instead of printing out information about system calls, 
>   > >   > the modified version calls the syscalls with improper 
>   > >   > values.
>   > > 
>   > >  It immediately DoSes kernel by calling sys_sysctl() with huge nlen:
>   > >  printk() consumes all CPU.
>   > 
>   > Something like this?
> 
>  On slow console (serial kgdb) this still would be problematic. I think
>  printk_ratelimit() is needed. But why this loop is needed at all? It
>  seems strange that syscall prints its arguments instead of just
>  returning -EINVAL.

It is kindly telling the user that the sysctl is obsolete.

I'll kill it.
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