Re: ibm fstack protector

From: Kris Kennaway (kris_at_obsecurity.org)
Date: 08/24/03

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    Date: Sun, 24 Aug 2003 10:06:35 -0700
To: Martin Larsson <sopppp@home.se>

    On Sun, Aug 24, 2003 at 04:18:00PM +0200, Martin Larsson wrote:
    > yo, ive been using the fstack protector for a while now and it worked
    > fine until i was gonna compile 4.8p3 then i got these errors,
    >
    > sio.o(.text+0x18b7): undefined reference to `__guard'
    > sio.o(.text+0x1da9): undefined reference to `__guard'
    > sio.o(.text+0x1db9): undefined reference to `__stack_smash_handler'
    > vga_isa.o: In function `isavga_probe':
    > vga_isa.o(.text+0x10): undefined reference to `__guard'
    > vga_isa.o(.text+0xb9): undefined reference to `__guard'
    > vga_isa.o(.text+0xc9): undefined reference to `__stack_smash_handler'
    > vga_isa.o(.text+0xc9): undefined reference to `__stack_smash_handler'
    > *** Error code 1
    >
    > Stop in /usr/obj/usr/src/sys/FJUTTSI.
    > *** Error code 1
    >
    > Stop in /usr/src.
    > *** Error code 1
    >
    > Stop in /usr/src.
    >
    > anyone succesfully compiled 4.8p3 with fstack protection?

    It looks like you don't have the full /usr/src patch installed. The
    sys/libkern/stack_smash_handler.c file is supposed to provide these
    symbols.

    Kris

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