tree 9f2af3014d5d41ddc22d7aa2793b871ee15297d8
parent 33dda515a1995dfb3b6b57d7ace9b3ee9d449c11
author Jiri Kosina <jkosina@suse.cz> 1212731165 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1212776949 -0700

brk: make sys_brk() honor COMPAT_BRK when computing lower bound

Fix a regression introduced by

commit 4cc6028d4040f95cdb590a87db478b42b8be0508
Author: Jiri Kosina <jkosina@suse.cz>
Date:   Wed Feb 6 22:39:44 2008 +0100

    brk: check the lower bound properly

The check in sys_brk() on minimum value the brk might have must take
CONFIG_COMPAT_BRK setting into account.  When this option is turned on
(i.e.  we support ancient legacy binaries, e.g.  libc5-linked stuff), the
lower bound on brk value is mm->end_code, otherwise the brk start is
allowed to be arbitrarily shifted.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>