This is a note to let you know that I've just added the patch titled
x86/apic: Fix parsing of the 'lapic' cmdline option
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-apic-fix-parsing-of-the-lapic-cmdline-option.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 27cf929845b10043f2257693c7d179a9e0b1980e Mon Sep 17 00:00:00 2001
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Date: Tue, 19 Feb 2013 20:47:07 +0100
Subject: x86/apic: Fix parsing of the 'lapic' cmdline option
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
commit 27cf929845b10043f2257693c7d179a9e0b1980e upstream.
Including " lapic " in the kernel cmdline on an x86-64 kernel
makes it panic while parsing early params -- e.g. with no user
visible output.
Fix this bug by ensuring arg is non-NULL before passing it to
strncmp().
Reported-by: PaX Team <pageexec@xxxxxxxxxxx>
Signed-off-by: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1361303227-13174-1-git-send-email-minipli@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/apic/apic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -131,7 +131,7 @@ static int __init parse_lapic(char *arg)
{
if (config_enabled(CONFIG_X86_32) && !arg)
force_enable_local_apic = 1;
- else if (!strncmp(arg, "notscdeadline", 13))
+ else if (arg && !strncmp(arg, "notscdeadline", 13))
setup_clear_cpu_cap(X86_FEATURE_TSC_DEADLINE_TIMER);
return 0;
}
Patches currently in stable-queue which might be from minipli@xxxxxxxxxxxxxx are
queue-3.8/x86-apic-fix-parsing-of-the-lapic-cmdline-option.patch
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