Jiri Kosina c1d171a002 x86: randomize brk ... Randomize the location of the heap (brk) for i386 and x86_64. The range is randomized in the range starting at current brk location up to 0x02000000 offset for both architectures. This, together with pie-executable-randomization.patch and pie-executable-randomization-fix.patch, should make the address space randomization on i386 and x86_64 complete. Arjan says: This is known to break older versions of some emacs variants, whose dumper code assumed that the last variable declared in the program is equal to the start of the dynamically allocated memory region. (The dumper is the code where emacs effectively dumps core at the end of it's compilation stage; this coredump is then loaded as the main program during normal use) iirc this was 5 years or so; we found this way back when I was at RH and we first did the security stuff there (including this brk randomization). It wasn't all variants of emacs, and it got fixed as a result (I vaguely remember that emacs already had code to deal with it for other archs/oses, just ifdeffed wrongly). It's a rare and wrong assumption as a general thing, just on x86 it mostly happened to be true (but to be honest, it'll break too if gcc does something fancy or if the linker does a non-standard order). Still its something we should at least document. Note 2: afaik it only broke the emacs *build*. I'm not 100% sure about that (it IS 5 years ago) though. [ akpm@linux-foundation.org: deuglification ] Signed-off-by: Jiri Kosina <jkosina@suse.cz> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Roland McGrath <roland@redhat.com> Cc: Jakub Jelinek <jakub@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		2008-01-30 13:30:40 +01:00
..
acpi	ACPI: suspend: old debugging hacks sneaked back	2007-12-06 16:03:06 -05:00
cpu	x86: extended interrupt LVT support for AMD Barcelona	2008-01-30 13:30:40 +01:00
.gitignore	.gitignore update for x86 arch	2007-10-17 21:19:04 +02:00
Makefile	x86: delete vsyscall files during make clean	2007-10-17 21:56:01 +02:00
Makefile_32	x86: isolate the rtc code for sharing	2008-01-30 13:30:26 +01:00
Makefile_64	x86: share rtc code	2008-01-30 13:30:27 +01:00
alternative.c	x86: convert cpuinfo_x86 array to a per_cpu array	2007-10-19 20:35:04 +02:00
aperture_64.c	x86: clean up arch/x86/kernel/aperture_64.c printk()s	2008-01-30 13:30:10 +01:00
apic_32.c	x86: move 8259 defines to i8259.h	2008-01-30 13:30:29 +01:00
apic_64.c	x86: extended interrupt LVT support for AMD Barcelona	2008-01-30 13:30:40 +01:00
apm_32.c	x86: move 8259 defines to i8259.h	2008-01-30 13:30:29 +01:00
asm-offsets.c	i386: move kernel	2007-10-11 11:17:01 +02:00
asm-offsets_32.c	x86: irqflags consolidation	2008-01-30 13:30:33 +01:00
asm-offsets_64.c	x86: remove unused tsk_thread from asm-offsets_64.c	2008-01-30 13:30:39 +01:00
audit_64.c	x86_64: move kernel	2007-10-11 11:17:24 +02:00
bootflag.c	i386: move kernel	2007-10-11 11:17:01 +02:00
bugs_64.c	Delete filenames in comments.	2007-10-13 10:01:23 -07:00
cpuid.c	PM: Acquire device locks on suspend	2008-01-24 20:40:04 -08:00
crash.c	x86: disable hpet legacy replacement for kdump	2007-12-03 17:17:10 +01:00
crash_dump_32.c	kmap leak fix for x86_32 kdump	2007-10-19 11:53:33 -07:00
crash_dump_64.c	Delete filenames in comments.	2007-10-13 10:01:23 -07:00
doublefault_32.c	i386: move kernel	2007-10-11 11:17:01 +02:00
e820_32.c	x86: remove extern declarations for code, data, bss resources	2008-01-30 13:30:32 +01:00
e820_64.c	x86: remove extern declarations for code, data, bss resources	2008-01-30 13:30:32 +01:00
early-quirks.c	x86 gart: rename symbols only used for the GART implementation	2007-10-30 00:22:22 +01:00
early_printk.c	[x86] remove uses of magic macros for boot_params access	2007-10-16 17:38:31 -07:00
efi_32.c	kexec: add BSS to resource tree	2007-10-22 08:13:19 -07:00
efi_stub_32.S	i386: move kernel	2007-10-11 11:17:01 +02:00
entry_32.S	x86: irqflags consolidation	2008-01-30 13:30:33 +01:00
entry_64.S	sched: high-res preemption tick	2008-01-25 21:08:29 +01:00
genapic_64.c	x86: convert cpu_to_apicid to be a per cpu variable	2007-10-19 20:35:03 +02:00
genapic_flat_64.c	x86: convert cpu_to_apicid to be a per cpu variable	2007-10-19 20:35:03 +02:00
geode_32.c	x86: Geode Multi-Function General Purpose Timers support	2007-10-12 23:04:06 +02:00
head64.c	x86: remove duplicate start_kernel declaration	2008-01-30 13:30:19 +01:00
head_32.S	fix lguest rmmod "bad pgd"	2008-01-01 11:30:35 -08:00
head_64.S	x86_64: move kernel	2007-10-11 11:17:24 +02:00
hpet.c	x86: remove duplicate includes	2008-01-30 13:30:32 +01:00
i386_ksyms_32.c	x86: unexport __{read,write}_lock_failed	2008-01-30 13:30:29 +01:00
i387_32.c	Delete filenames in comments.	2007-10-13 10:01:23 -07:00
i387_64.c	x86: fix taking DNA during 64bit sigreturn	2007-11-12 11:09:33 -08:00
i8237.c	Driver core: change sysdev classes to use dynamic kobject names	2008-01-24 20:40:40 -08:00
i8253.c	x86: unregister PIT clocksource when PIT is disabled	2008-01-30 13:30:03 +01:00
i8259_32.c	x86: move 8259 defines to i8259.h	2008-01-30 13:30:29 +01:00
i8259_64.c	x86: make i8259_64 more _32-like	2008-01-30 13:30:29 +01:00
init_task.c	x86: nuke a ton of unused exports	2008-01-30 13:30:28 +01:00
io_apic_32.c	x86: move 8259 defines to i8259.h	2008-01-30 13:30:29 +01:00
io_apic_64.c	x86: clear IO_APIC before enabing apic error vector.	2008-01-30 13:30:39 +01:00
io_delay.c	x86: add DMI quirk for io-delay hangs on Compaq Presario V6000 laptops	2008-01-30 13:30:05 +01:00
ioport_32.c	x86: clean up ioport_32.c	2008-01-30 13:30:24 +01:00
ioport_64.c	Delete filenames in comments.	2007-10-13 10:01:23 -07:00
irq_32.c	x86: also show non-zero IRQ counts for vectors that currently don't have a handler	2007-10-17 20:16:54 +02:00
irq_64.c	x86: move ack_bad_irq into irq code	2008-01-30 13:30:19 +01:00
k8.c	x86_64: move kernel	2007-10-11 11:17:24 +02:00
kprobes_32.c	x86: jprobe bugfix	2007-12-18 18:05:58 +01:00
kprobes_64.c	x86: kprobes bugfix	2007-12-18 18:05:58 +01:00
ldt.c	x86: merge arch/x86/kernel/ldt_32/64.c	2008-01-30 13:30:14 +01:00
machine_kexec_32.c	Use extended crashkernel command line on i386	2007-10-19 11:53:49 -07:00
machine_kexec_64.c	x86: Dump filtering supports x86_64 sparsemem	2007-10-27 20:57:43 +02:00
mca_32.c	Delete filenames in comments.	2007-10-13 10:01:23 -07:00
mfgpt_32.c	x86: GEODE fix a race condition in the MFGPT timer tick	2008-01-22 23:30:16 +01:00
microcode.c	cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()	2008-01-25 21:08:02 +01:00
module_32.c	i386: move kernel	2007-10-11 11:17:01 +02:00
module_64.c	x86_64: move kernel	2007-10-11 11:17:24 +02:00
mpparse_32.c	x86: cleanup mpspec variants	2008-01-30 13:30:35 +01:00
mpparse_64.c	x86: acpi use cpu_physical_id	2007-10-19 20:35:03 +02:00
msr.c	PM: Acquire device locks on suspend	2008-01-24 20:40:04 -08:00
nmi_32.c	x86: clean up nmi_32/64.c	2008-01-30 13:30:33 +01:00
nmi_64.c	x86: clean up nmi_32/64.c	2008-01-30 13:30:33 +01:00
numaq_32.c	i386: move kernel	2007-10-11 11:17:01 +02:00
paravirt_32.c	x86: irqflags consolidation	2008-01-30 13:30:33 +01:00
pci-calgary_64.c	x86: remove duplicate includes	2008-01-30 13:30:32 +01:00
pci-dma_32.c	i386: Clean up duplicate includes in arch/i386/kernel/	2007-10-17 20:15:51 +02:00
pci-dma_64.c	x86: pci-dma_64.c: cleanups	2008-01-30 13:30:31 +01:00
pci-gart_64.c	x86: code cleanups in arch/x86/kernel/pci-gart_64.c	2008-01-30 13:30:12 +01:00
pci-nommu_64.c	x86 gart: rename iommu.h to gart.h	2007-10-30 00:22:22 +01:00
pci-swiotlb_64.c	x86: nuke a ton of unused exports	2008-01-30 13:30:28 +01:00
pcspeaker.c	i386: move kernel	2007-10-11 11:17:01 +02:00
pmtimer_64.c	x86: move pmtmr related declarations	2008-01-30 13:30:18 +01:00
process_32.c	x86: randomize brk	2008-01-30 13:30:40 +01:00
process_64.c	x86: randomize brk	2008-01-30 13:30:40 +01:00
ptrace_32.c	spelling fixes: arch/i386/	2007-10-20 01:13:56 +02:00
ptrace_64.c	x86: convert mm_context_t semaphore to a mutex	2007-10-17 20:17:00 +02:00
quirks.c	x86: Add HPET force support for MCP55 (nForce 5) chipsets	2007-10-23 22:37:25 +02:00
reboot_32.c	x86: disable hpet on shutdown	2007-12-03 17:17:10 +01:00
reboot_64.c	x86: disable hpet on shutdown	2007-12-03 17:17:10 +01:00
reboot_fixups_32.c	x86: reboot fixup for wrap2c board	2007-11-17 16:27:02 +01:00
relocate_kernel_32.S	i386: move kernel	2007-10-11 11:17:01 +02:00
relocate_kernel_64.S	x86_64: move kernel	2007-10-11 11:17:24 +02:00
rtc.c	x86: share rtc code	2008-01-30 13:30:27 +01:00
scx200_32.c	long vs. unsigned long - low-hanging fruits in drivers	2007-10-14 12:41:51 -07:00
setup64.c	x86: use descriptor's functions instead of inline assembly	2007-10-19 20:35:03 +02:00
setup_32.c	x86: remove extern declarations for code, data, bss resources	2008-01-30 13:30:32 +01:00
setup_64.c	x86: store core id bits in cpuinfo_x8	2008-01-30 13:30:39 +01:00
sigframe_32.h	i386: move kernel	2007-10-11 11:17:01 +02:00
signal_32.c	x86: protect against sigaltstack wraparound	2008-01-30 13:30:06 +01:00
signal_64.c	sched: high-res preemption tick	2008-01-25 21:08:29 +01:00
smp_32.c	x86: export smp_ops to allow modular build of KVM	2007-10-27 20:57:43 +02:00
smp_64.c	x86: cleanup tlbflush.h variants	2008-01-30 13:30:35 +01:00
smpboot_32.c	x86: adjust numa 32 namespace	2008-01-30 13:30:38 +01:00
smpboot_64.c	x86: untable __init references between IO data	2008-01-30 13:30:40 +01:00
smpcommon_32.c	i386: move kernel	2007-10-11 11:17:01 +02:00
srat_32.c	i386: move kernel	2007-10-11 11:17:01 +02:00
stacktrace.c	x86: nuke a ton of unused exports	2008-01-30 13:30:28 +01:00
summit_32.c	spelling fixes: arch/i386/	2007-10-20 01:13:56 +02:00
suspend_64.c	x86: hibernation: document __save_processor_state() on x86	2008-01-30 13:30:04 +01:00
suspend_asm_64.S	x86: Save registers in saved_context during suspend and hibernation	2007-10-23 22:37:24 +02:00
sys_i386_32.c	remove include/asm-*/ipc.h	2007-10-17 08:42:55 -07:00
sys_x86_64.c	Delete filenames in comments.	2007-10-13 10:01:23 -07:00
syscall_64.c	i386/x86_64: move headers to include/asm-x86	2007-10-11 11:20:03 +02:00
syscall_table_32.S	i386: move kernel	2007-10-11 11:17:01 +02:00
sysenter_32.c	Delete filenames in comments.	2007-10-13 10:01:23 -07:00
tce_64.c	x86: Create clflush() inline, remove hardcoded wbinvd	2007-10-17 20:16:12 +02:00
time_32.c	x86: move 8259 defines to i8259.h	2008-01-30 13:30:29 +01:00
time_64.c	x86: clean up arch/x86/kernel/time_64.c includes	2008-01-30 13:30:27 +01:00
topology.c	x86: arch_register_cpu() section fix	2007-12-04 17:19:07 +01:00
trampoline_32.S	x86: misc. constifications	2007-10-17 20:16:08 +02:00
trampoline_64.S	x86: misc. constifications	2007-10-17 20:16:08 +02:00
traps_32.c	lockdep: more hardirq annotations for notify_die()	2008-01-16 09:51:59 +01:00
traps_64.c	x86: nuke a ton of unused exports	2008-01-30 13:30:28 +01:00
tsc_32.c	x86: scale cyc_2_nsec according to CPU frequency	2008-01-30 13:30:06 +01:00
tsc_64.c	x86: scale cyc_2_nsec according to CPU frequency	2008-01-30 13:30:06 +01:00
tsc_sync.c	x86: fix: s2ram + P4 + tsc = annoyance	2008-01-30 13:30:04 +01:00
verify_cpu_64.S	x86_64: move kernel	2007-10-11 11:17:24 +02:00
vm86_32.c	Delete filenames in comments.	2007-10-13 10:01:23 -07:00
vmi_32.c	x86: irqflags consolidation	2008-01-30 13:30:33 +01:00
vmiclock_32.c	x86: move 8259 defines to i8259.h	2008-01-30 13:30:29 +01:00
vmlinux.lds.S	i386: move kernel	2007-10-11 11:17:01 +02:00
vmlinux_32.lds.S	all archs: consolidate init and exit sections in vmlinux.lds.h	2008-01-28 23:21:17 +01:00
vmlinux_64.lds.S	all archs: consolidate init and exit sections in vmlinux.lds.h	2008-01-28 23:21:17 +01:00
vsmp_64.c	x86: clean up arch/x86/kernel/vsmp_64.c	2008-01-30 13:30:24 +01:00
vsyscall-int80_32.S	i386: move kernel	2007-10-11 11:17:01 +02:00
vsyscall-note_32.S	i386: move kernel	2007-10-11 11:17:01 +02:00
vsyscall-sigreturn_32.S	i386: move kernel	2007-10-11 11:17:01 +02:00
vsyscall-sysenter_32.S	i386: move kernel	2007-10-11 11:17:01 +02:00
vsyscall_32.S	i386: move kernel	2007-10-11 11:17:01 +02:00
vsyscall_32.lds.S	i386: move kernel	2007-10-11 11:17:01 +02:00
vsyscall_64.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial	2007-10-19 20:36:17 -07:00
x8664_ksyms_64.c	x86: unexport __{read,write}_lock_failed	2008-01-30 13:30:29 +01:00