Fernando Vazquez dc2bc768a0 [PATCH] stack overflow safe kdump: safe_smp_processor_id() ... This is a the first of a series of patch-sets aiming at making kdump more robust against stack overflows. This patch set does the following: * Add safe_smp_processor_id function to i386 architecture (this function was inspired by the x86_64 function of the same name). * Substitute "smp_processor_id" with the stack overflow-safe "safe_smp_processor_id" in the reboot path to the second kernel. This patch: On the event of a stack overflow critical data that usually resides at the bottom of the stack is likely to be stomped and, consequently, its use should be avoided. In particular, in the i386 and IA64 architectures the macro smp_processor_id ultimately makes use of the "cpu" member of struct thread_info which resides at the bottom of the stack. x86_64, on the other hand, is not affected by this problem because it benefits from the use of the PDA infrastructure. To circumvent this problem I suggest implementing "safe_smp_processor_id()" (it already exists in x86_64) for i386 and IA64 and use it as a replacement for smp_processor_id in the reboot path to the dump capture kernel. This is a possible implementation for i386. Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp> Looks-reasonable-to: Andi Kleen <ak@muc.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-10-01 00:39:30 -07:00
..
acpi	[PATCH] x86: Allow disabling early pci scans with pci=noearly or disallowing conf1	2006-09-26 10:52:41 +02:00
cpu	Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6	2006-09-26 13:07:55 -07:00
.gitignore	[PATCH] x86: gitignore some autogenerated files for i386	2006-02-14 16:09:35 -08:00
alternative.c	[PATCH] lockdep: x86 smp alternatives workaround	2006-07-03 15:27:04 -07:00
apic.c	[PATCH] i386: Make enable_local_apic static	2006-09-26 10:52:35 +02:00
apm.c	[PATCH] kthread: convert arch/i386/kernel/apm.c	2006-09-29 09:18:12 -07:00
asm-offsets.c	[PATCH] vdso: randomize the i386 vDSO by moving it into a vma	2006-06-27 17:32:38 -07:00
bootflag.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
cpuid.c	[PATCH] Fix modular cpuid.ko	2006-07-03 21:25:20 -07:00
crash_dump.c	[PATCH] kdump: read previous kernel's memory	2006-01-10 08:01:28 -08:00
crash.c	[PATCH] i386: Kdump i386 nmi event notification fix	2006-09-26 10:52:27 +02:00
doublefault.c	[PATCH] i386: cpu_relax() in crash.c and doublefault.c	2006-06-25 10:00:55 -07:00
early_printk.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
efi_stub.S	[PATCH] x86: remove unused include from efi_stub.S	2006-09-26 08:48:56 -07:00
efi.c	[PATCH] efi: add lock annotations for efi_call_phys_prelog and efi_call_phys_epilog	2006-09-29 09:18:07 -07:00
entry.S	[PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder	2006-09-26 10:52:41 +02:00
head.S	[PATCH] i386: Do better early exception handlers	2006-09-26 10:52:39 +02:00
hpet.c	[PATCH] Fix faulty HPET clocksource usage (fix for bug #7062)	2006-09-01 11:39:08 -07:00
i386_ksyms.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
i387.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
i8237.c	[PATCH] mmc (mainly): add "or later" clause to licence statement.	2006-10-01 00:39:23 -07:00
i8253.c	[PATCH] time: fix time going backward w/ clock=pit	2006-06-26 09:58:21 -07:00
i8259.c	[PATCH] x86: - restore i8259A eoi status on resume	2006-09-26 10:52:41 +02:00
init_task.c	[PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros	2006-01-08 20:13:38 -08:00
io_apic.c	[PATCH] i386: Replace i386 open-coded cmdline parsing with	2006-09-26 10:52:32 +02:00
ioport.c	[PATCH] i386: use thread_info flags for debug regs and IO bitmaps	2006-07-09 18:47:12 -07:00
irq.c	[PATCH] i386: Fix stack switching in do_IRQ	2006-08-30 16:05:16 -07:00
kprobes.c	[PATCH] kprobe-booster: disable in preemptible kernel	2006-07-31 13:28:38 -07:00
ldt.c	[PATCH] arch/i386/kernel/ldt.c should #include <asm/mmu_context.h>	2005-11-07 07:53:29 -08:00
machine_kexec.c	[PATCH] i386: Avoid overwriting the current pgd (V4, i386)	2006-09-26 10:52:38 +02:00
Makefile	[PATCH] i386: Do stacktracer conversion too	2006-09-26 10:52:34 +02:00
mca.c	[PATCH] i386: Disallow kprobes on NMI handlers	2006-09-26 10:52:36 +02:00
microcode.c	[PATCH] x86 microcode: don't check the size	2006-09-27 08:26:18 -07:00
module.c	[PATCH] x86: SMP alternatives	2006-03-23 07:38:04 -08:00
mpparse.c	[PATCH] i386: Support physical cpu hotplug for x86_64	2006-09-26 10:52:35 +02:00
msr.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial	2006-06-30 15:39:30 -07:00
nmi.c	[PATCH] x86: Clean up x86 NMI sysctls	2006-09-30 01:47:55 +02:00
numaq.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
pci-dma.c	[PATCH] gfp flags annotations - part 1	2005-10-08 15:00:57 -07:00
process.c	[PATCH] kmemdup: some users	2006-10-01 00:39:19 -07:00
ptrace.c	[PATCH] i386/x86-64: rename is_at_popf(), add iret to tests and fix	2006-09-26 10:52:33 +02:00
quirks.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
reboot_fixups.c	[PATCH] i386: Remove printk about reboot fixups at reboot	2006-04-09 11:53:53 -07:00
reboot.c	[PATCH] x86: remove locally-defined ldt structure in favour of standard type	2006-09-26 08:48:55 -07:00
relocate_kernel.S	[PATCH] i386: Avoid overwriting the current pgd (V4, i386)	2006-09-26 10:52:38 +02:00
scx200.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
setup.c	[PATCH] i386: replace intermediate array-size definitions with ARRAY_SIZE()	2006-09-30 01:47:55 +02:00
sigframe.h	[PATCH] __user annotations for pointers in i386 sigframe	2005-09-09 10:31:59 -07:00
signal.c	[PATCH] vdso: randomize the i386 vDSO by moving it into a vma	2006-06-27 17:32:38 -07:00
smp.c	[PATCH] stack overflow safe kdump: safe_smp_processor_id()	2006-10-01 00:39:30 -07:00
smpboot.c	[PATCH] completions: lockdep annotate on stack completions	2006-10-01 00:39:24 -07:00
srat.c	[PATCH] convert i386 Summit subarch to use SRAT info for apicid_to_node calls	2006-09-29 09:18:03 -07:00
summit.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
sys_i386.c	[PATCH] Uninline sys_mmap common code (reduce binary size)	2006-03-22 07:54:02 -08:00
syscall_table.S	[PATCH] x86: Add portable getcpu call	2006-09-26 10:52:28 +02:00
sysenter.c	[PATCH] small fix for not releasing the mmap semaphore in i386/arch_setup_additional_pages	2006-06-28 12:05:50 -07:00
time_hpet.c	[PATCH] hpet rtc emulation: add watchdog timer	2006-09-26 08:48:54 -07:00
time.c	[PATCH] kill wall_jiffies	2006-10-01 00:39:27 -07:00
topology.c	[PATCH] i386: clean up topology.c	2006-09-26 10:52:35 +02:00
trampoline.S	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
traps.c	[PATCH] x86: Clean up x86 NMI sysctls	2006-09-30 01:47:55 +02:00
tsc.c	[PATCH] i386: mark two more functions as __init	2006-09-26 10:52:35 +02:00
vm86.c	Remove obsolete #include <linux/config.h>	2006-06-30 19:25:36 +02:00
vmlinux.lds.S	[PATCH] x86: put .note.* sections into a PT_NOTE segment in vmlinux	2006-09-26 08:48:55 -07:00
vsyscall-int80.S	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
vsyscall-note.S	[PATCH] i386 vDSO: add PT_NOTE segment	2005-04-16 15:24:48 -07:00
vsyscall-sigreturn.S	[PATCH] Mark unwind info for signal trampolines in vDSOs	2006-03-31 12:18:52 -08:00
vsyscall-sysenter.S	[PATCH] vdso: randomize the i386 vDSO by moving it into a vma	2006-06-27 17:32:38 -07:00
vsyscall.lds.S	[PATCH] vDSO hash-style fix	2006-07-31 13:28:43 -07:00
vsyscall.S	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00