On Wed, Sep 2, 2015 at 8:02 AM, Muni Sekhar <munisekhar...@gmail.com> wrote: > [ Please keep me in CC as I'm not subscribed to the list] > > Hello, > > > I am getting protection faults in different kernel modules if I try to > free a pointer "from the middle" for example, look at the following > code: > > > u8 *buf; > > > buf = kzalloc( 100 , GFP_KERNEL ); > > … > > buf = buf + 50; > > … > > Kfree(buf); > > > > > I would like to know, why the above code is causing protection faults > in other kernel modules?
Because you can not make a "hole" in returned memory like that, you can only free entire block allocated by k*alloc and you need to pass the original pointer in. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
