Re: [BUG] linux-next: Tree for April 9 warning on CC_STACKPROTECTOR,followed by kernel panic

[Jacek Luczak]

Kamalesh Babulal pisze:
> Jacek Luczak wrote:
> > Kamalesh Babulal pisze:
> > > Hi Stephen,
> > >
> > > The next-20080409 kernel warns while booting up on a x86_64 machine.
> > > When compiled the kernel with CONFIG_CC_STACKPROTECTOR=y, the warning
> > > is followed by the kernel panic.
> > >
> > > Testing -fstack-protector-all feature
> > > No -fstack-protector-stack-frame!
> > > -fstack-protector-all test failed
> > > ------------[ cut here ]------------
> > > WARNING: at kernel/panic.c:365 __stack_chk_test+0x4b/0x50()
> > > Modules linked in:
> > > Pid: 1, comm: swapper Not tainted 2.6.25-rc8-next-20080409-autotest #1
> > >
> > > Call Trace:
> > >  [<ffffffff80231f5e>] warn_on_slowpath+0x51/0x63
> > >  [<ffffffff80232d93>] printk+0x4e/0x56
> > >  [<ffffffff80382fcd>] extract_entropy+0x47/0x90
> > >  [<ffffffff80230000>] dup_mm+0xca/0x3fd
> > >  [<ffffffff80231eba>] __stack_chk_test_func+0x21/0x32
> > >  [<ffffffff80231fbb>] __stack_chk_test+0x4b/0x50
> > >  [<ffffffff808ba8f1>] kernel_init+0x189/0x2f9
> > >  [<ffffffff804ee221>] _spin_unlock_irq+0x9/0xc
> > >  [<ffffffff8020cb88>] child_rip+0xa/0x12
> > >  [<ffffffff808ba768>] kernel_init+0x0/0x2f9
> > >  [<ffffffff8020cb7e>] child_rip+0x0/0x12
> > >
> > > ---[ end trace d88d2f3a71e3b32c ]---
> > Hi,
> >
> > what version of GCC are you using?
> >
> > -Jacek
> Hi Jacek,
>
> I use the gcc version (GCC) 4.1.1 20060525 (Red Hat 4.1.1-1)

IMO it's GCC problem (I've seen a lot of problems with stack-protector and GCC 4.1 branch). Can you make some tests with 
4.2 branch?

-Jacek
-Jacek
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