From: Bernhard Walle <bwalle@suse.de>
To: linux-kernel@vger.kernel.org, kexec@lists.infradead.org
Cc: akpm@linux-foundation.org, ak@suse.de
Subject: [patch 0/2] Protect crashkernel against BSS overlap
Date: Mon, 15 Oct 2007 13:50:42 +0200 [thread overview]
Message-ID: <20071015115042.391348549@strauss.suse.de> (raw)
I observed the problem that even when you choose the default 16M as
crashkernel base address and the kernel is very big, the reserved area may
overlap with the kernel BSS. Currently, this is not checked at runtime, so the
kernel just crashes when you load the panic kernel in the sys_kexec call.
This two patches check this at runtime. The patches are against current git,
but with the patches
extended-crashkernel-command-line.patch
extended-crashkernel-command-line-update.patch
extended-crashkernel-command-line-comment-fix.patch
extended-crashkernel-command-line-improve-error-handling-in-parse_crashkernel_mem.patch
use-extended-crashkernel-command-line-on-i386.patch
use-extended-crashkernel-command-line-on-i386-update.patch
use-extended-crashkernel-command-line-on-x86_64.patch
use-extended-crashkernel-command-line-on-x86_64-update.patch
use-extended-crashkernel-command-line-on-ia64.patch
use-extended-crashkernel-command-line-on-ia64-fix.patch
use-extended-crashkernel-command-line-on-ia64-update.patch
use-extended-crashkernel-command-line-on-ppc64.patch
use-extended-crashkernel-command-line-on-ppc64-update.patch
use-extended-crashkernel-command-line-on-sh.patch
use-extended-crashkernel-command-line-on-sh-update.patch
from -mm tree applied since they are marked to be merged in 2.6.24.
I know that the implementation of both patches is only x86 (i386 and x86-64),
but if you agree that it's the way to go, I can add the BSS resource
and the check for all other architectures that apply.
Signed-off-by: Bernhard Walle <bwalle@suse.de>
--
next reply other threads:[~2007-10-15 11:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-15 11:50 Bernhard Walle [this message]
2007-10-15 11:50 ` [patch 1/2] Add BSS to resource tree Bernhard Walle
2007-10-15 18:32 ` Andrew Morton
2007-10-15 21:24 ` Bernhard Walle
2007-10-15 11:50 ` [patch 2/2] Check if the crashkernel area is behind BSS Bernhard Walle
2007-10-16 5:49 ` [patch 0/2] Protect crashkernel against BSS overlap Vivek Goyal
2007-10-16 9:59 ` Andi Kleen
2007-10-16 16:26 ` Bernhard Walle
2007-10-16 16:28 ` Bernhard Walle
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