Re: 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'

On 7/1/06, Sam Ravnborg <[email protected]> wrote:

 >> > > >
> >> > > >   KLIBCLD usr/klibc/libc.so
> >> > > > usr/klibc/execl.o: In function `execl':
...
 >
> >https://wiki.ubuntu.com/GccSsp
> >
> >It appears that Ubuntu's Edgy Eft (the development tree) now contains
> >"Stack Smashing Protection" enabled by default.  I found a web page
> >that states that -fno-stack-protector can be used to disable this
> >functionality.  Interestingly, another web page stated that SSP has
> >been enabled in Redhat compilers for a long time and is now also
> >enabled in Debian SID.  Perhaps -fno-stack-protector should be added
> >to the kernel build be default?
>
> Darn it.  I don't seem to know how to get -fno-stack-protector to
> work.  I ran:
> export CFLAGS=-fno-stack-protector
> make mrproper
> cp ../.config .
> make oldconfig
> CFLAGS=-fno-stack-protector make all install modules modules_install
>
> But I am still getting the errors.  Anyone know what I am doing wrong?

For klibc you need to patch scripts/Kbuild.klibc

Appending it to KLIBCWARNFLAGS seems the right place.

Do you know from what gcc version we can start using -fno-stack-protector?

This fixed is for me.  Andrew, would this be appropriate to merge into
your tree?

--- scripts/Kbuild.klibc.old    2006-07-01 16:32:55.000000000 -0700
+++ scripts/Kbuild.klibc        2006-07-01 16:28:59.000000000 -0700
@@ -51,7 +51,7 @@
KLIBCREQFLAGS     :=
KLIBCARCHREQFLAGS :=
KLIBCOPTFLAGS     :=
-KLIBCWARNFLAGS    := -W -Wall -Wno-sign-compare -Wno-unused-parameter
+KLIBCWARNFLAGS    := -W -Wall -Wno-sign-compare -Wno-unused-parameter
-fno-stack-protector
KLIBCSHAREDFLAGS  :=
KLIBCBITSIZE      :=
KLIBCLDFLAGS      :=
-
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---

• References:
  • 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'
    • From: "Miles Lane" <[email protected]>
  • Re: 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'
    • From: Arjan van de Ven <[email protected]>
  • Re: 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'
    • From: "Miles Lane" <[email protected]>
  • Re: 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'
    • From: Arjan van de Ven <[email protected]>
  • Re: 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'
    • From: "Miles Lane" <[email protected]>
  • Re: 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'
    • From: "Miles Lane" <[email protected]>
  • Re: 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'
    • From: Sam Ravnborg <[email protected]>

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