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Linus Torvalds 808dbbb6bb x86: be more careful when walking back the frame pointer chain 
When showing the stack backtrace, make sure that we never accept not
only an unchanging frame pointer, but also a frame pointer that moves
back down the stack frame.  It must always grow up (toward older stack
frames).

I doubt this has triggered, but a subtly corrupt stack with extremely
unlucky contents could cause us to loop forever on a bogus endless frame
pointer chain.

This review was triggered by much worse problems happening in some of
the other stack unwinding code.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2006-11-17 11:14:56 -08:00
..
acpi [PATCH] x86: Add acpi_user_timer_override option for Asus boards 2006-11-14 16:57:46 +01:00
cpu [PATCH] thermal throttle: sysfs error checking 2006-10-13 08:35:39 -07:00
.gitignore
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Makefile [PATCH] i386: Do stacktracer conversion too 2006-09-26 10:52:34 +02:00
alternative.c [PATCH] Fix potential interrupts during alternative patching 2006-10-20 10:26:43 -07:00
apic.c [PATCH] i386: irqs build fix 2006-10-06 08:53:39 -07:00
apm.c [PATCH] APM: URL of APM 1.2 specs has changed 2006-10-30 12:08:42 -08:00
asm-offsets.c
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bootflag.c
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cpuid.c
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crash.c [PATCH] stack overflow safe kdump: safe smp_send_nmi_allbutself() 2006-10-01 00:39:31 -07:00
crash_dump.c
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doublefault.c
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early_printk.c
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efi.c BUG_ON cleanups in arch/i386 2006-10-03 23:34:58 +02:00
efi_stub.S [PATCH] x86: remove unused include from efi_stub.S 2006-09-26 08:48:56 -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: Fix fake return address 2006-10-21 18:37:02 +02:00
hpet.c
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i386_ksyms.c
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i387.c
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i8237.c [PATCH] mmc (mainly): add "or later" clause to licence statement. 2006-10-01 00:39:23 -07:00
i8253.c [PATCH] i386 Time: Avoid PIT SMP lockups 2006-10-17 08:18:42 -07:00
i8259.c [PATCH] genirq: clean up irq-flow-type naming 2006-10-17 08:18:45 -07:00
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
io_apic.c [PATCH] Use delayed disable mode of ioapic edge triggered interrupts 2006-11-15 09:04:32 -08:00
ioport.c
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irq.c [PATCH] genirq: clean up irq-flow-type naming 2006-10-17 08:18:45 -07:00
kprobes.c [PATCH] kretprobe: fix kretprobe-booster to save regs and set status 2006-11-08 18:29:24 -08:00
ldt.c fix file specification in comments 2006-10-03 23:01:26 +02:00
machine_kexec.c [PATCH] i386: Avoid overwriting the current pgd (V4, i386) 2006-09-26 10:52:38 +02:00
mca.c [PATCH] i386: Disallow kprobes on NMI handlers 2006-09-26 10:52:36 +02:00
microcode.c [PATCH] Regression in 2.6.19-rc microcode driver 2006-11-08 18:29:22 -08:00
module.c
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mpparse.c [PATCH] i386: Support physical cpu hotplug for x86_64 2006-09-26 10:52:35 +02:00
msr.c
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nmi.c [PATCH] i386: Disable nmi watchdog on all ThinkPads 2006-10-21 18:37:02 +02:00
numaq.c
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pci-dma.c
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process.c [PATCH] i386/x86_64: ACPI cpu_idle_wait() fix 2006-11-17 08:20:09 -08:00
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
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reboot.c [PATCH] x86: remove locally-defined ldt structure in favour of standard type 2006-09-26 08:48:55 -07:00
reboot_fixups.c
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relocate_kernel.S [PATCH] i386: Avoid overwriting the current pgd (V4, i386) 2006-09-26 10:52:38 +02:00
scx200.c
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setup.c [PATCH] fix efi_memory_present_wrapper() 2006-10-28 11:30:51 -07:00
sigframe.h
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signal.c
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smp.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
smpboot.c [PATCH] i383 numa: fix numaq/summit apicid conflict 2006-10-03 18:46:10 -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
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sys_i386.c [PATCH] provide kernel_execve on all architectures 2006-10-02 07:57:23 -07:00
syscall_table.S [PATCH] epoll_pwait() 2006-10-11 11:14:21 -07:00
sysenter.c
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time.c arch/i386/kernel/time: don't shadow 'irq' function arg 2006-10-06 13:32:44 -04:00
time_hpet.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
topology.c [PATCH] i386: clean up topology.c 2006-09-26 10:52:35 +02:00
trampoline.S
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traps.c x86: be more careful when walking back the frame pointer chain 2006-11-17 11:14:56 -08:00
tsc.c [PATCH] i386 Time: Avoid PIT SMP lockups 2006-10-17 08:18:42 -07:00
vm86.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
vmlinux.lds.S [PATCH] i386: Force data segment to be 4K aligned 2006-11-08 18:29:23 -08:00
vsyscall-int80.S
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vsyscall-note.S
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vsyscall-sigreturn.S
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vsyscall-sysenter.S
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vsyscall.S
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vsyscall.lds.S
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