Subject: Re: mprotect broken on ppc

From: Olaf Hering <[email-masked]>
Date: Sun, 21 Jan 2001 18:30:31 +0100

On Sat, Jan 20, Olaf Hering wrote:

>
> On Sat, Jan 20, Olaf Hering wrote:
>
> >
> > Hi,
> >
> > there seems to be a bug in mprotect which was introduced in
> > test9->test10.
> >
> > The result is an invalid pointer from the getpwuid(3) function, this
> > function is used in rpm to check owner and group permissions.
>
> forgot some facts:
>
> the build host runs always a glibc2.13 system with 2.2 headers. The
> build chroot runs a glibc2.2 system with 2.4.0ac2 headers.
> And it fails when a kernel 2.4.0-test10 or later is running, every other
> kernel works fine.

I put some debug in mm/mprotect.c:
...
asmlinkage long sys_mprotect(unsigned long start, size_t len, unsigned
long prot)
{
        unsigned long nstart, end, tmp;
        struct vm_area_struct * vma, * next;
        int error = -EINVAL;

        if (start & ~PAGE_MASK) {
                printk("sys_mprotect start \n");
                return -EINVAL;
        }
...

it fails here.
Jan 21 18:28:06 mandarine kernel: sys_mprotect start

Gruss Olaf

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