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linux/arch/parisc
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James Hogan db5f7d04fd metag: Reduce maximum stack size to 256MB 
commit d71f290b4e upstream.

Specify the maximum stack size for arches where the stack grows upward
(parisc and metag) in asm/processor.h rather than hard coding in
fs/exec.c so that metag can specify a smaller value of 256MB rather than
1GB.

This fixes a BUG on metag if the RLIMIT_STACK hard limit is increased
beyond a safe value by root. E.g. when starting a process after running
"ulimit -H -s unlimited" it will then attempt to use a stack size of the
maximum 1GB which is far too big for metag's limited user virtual
address space (stack_top is usually 0x3ffff000):

BUG: failure at fs/exec.c:589/shift_arg_pages()!

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: linux-parisc@vger.kernel.org
Cc: linux-metag@vger.kernel.org
Cc: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2014-06-07 10:28:23 -07:00
..
configs parisc: update 64bit defconfigs and use SIL680 instead of SIIMAGE driver 2013-12-03 23:23:35 +01:00
hpux execve: use 'struct filename *' for executable name passing 2014-02-05 12:54:53 -08:00
include metag: Reduce maximum stack size to 256MB 2014-06-07 10:28:23 -07:00
kernel parisc: Improve LWS-CAS performance 2014-06-07 10:28:23 -07:00
lib parisc: size_t is unsigned, so comparison size < 0 doesn't make sense. 2013-11-20 00:09:42 +01:00
math-emu parisc: remove duplicate define 2013-11-07 22:28:15 +01:00
mm parisc: ratelimit userspace segfault printing 2014-06-07 10:28:23 -07:00
oprofile oprofile: more whitespace fixes 2008-10-15 20:55:51 +02:00
defpalo.conf parisc: switch to gzip-compressed vmlinuz kernel 2013-07-09 22:09:20 +02:00
install.sh parisc: make "make install" not depend on vmlinux 2013-11-07 22:28:06 +01:00
Kconfig parisc: ratelimit userspace segfault printing 2014-06-07 10:28:23 -07:00
Kconfig.debug consolidate per-arch stack overflow debugging options 2013-07-04 11:25:39 -07:00
Makefile parisc: make "make install" not depend on vmlinux 2013-11-07 22:28:06 +01:00
nm Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00