Re: linux-next: WARNING: at kernel/panic.c:375 __stack_chk_test+0x50/0x54()
From: Kevin Winchester
Date: Wed Apr 30 2008 - 20:24:49 EST
Arjan van de Ven wrote:
Kevin Winchester wrote:
Hi Arjan,
There doesn't seem to be an entry in MAINTAINERS for stack protector,
but your signoff was on the last stack protector related commit I could
find, so it's probably a good bet.
I get the following in my dmesg after testing linux-next with the stack
protector turned on. This is an x86-64 UP box if that helps. It
appears to be related to the test for the feature (or perhaps that is
supposed to happen when the feature is tested, I'm not sure...). Config
below.
the important question is: exactly what gcc are you using? (and if you use a distro gcc,
which distro)
second question would be, what does the following command give?
echo "int foo(void) { char X[200]; return 3; }" | $1 -S -xc -c -O0 -mcmodel=kernel -fstack-protector - -o -
(this is the command from scripts/gcc-x86_64-has-stack-protector.sh that the kernel uses to test at compiletime
if you have stack protector support)
Ubuntu Hardy Heron
kevin@alekhine:~$ gcc --version
gcc (GCC) 4.2.3 (Ubuntu 4.2.3-2ubuntu7)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
kevin@alekhine:~$ echo "int foo(void) { char X[200]; return 3; }" | $1 -S -xc -c -O0 -mcmodel=kernel -fstack-protector - -o -
bash: -S: command not found
I assume that $1 was supposed to be gcc, so how about:
kevin@alekhine:~/linux/linux-2.6/scripts$ sh gcc-x86_64-has-stack-protector.sh gcc something
something
So I would assume that means I pass...
Does that help at all?
--
Kevin Winchester
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