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authorThomas Garnier <thgarnie@google.com>2016-10-11 23:55:08 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-12 01:06:33 +0300
commit0549a3c02efb350776bc869685a361045efd3a29 (patch)
tree5ee321acb84f3e8c625927d2204853bbdc441c56 /arch
parent2a1613a586de91457fa93c3e468a6e2438fe52a0 (diff)
downloadlinux-0549a3c02efb350776bc869685a361045efd3a29.tar.xz
kdump, vmcoreinfo: report memory sections virtual addresses
KASLR memory randomization can randomize the base of the physical memory mapping (PAGE_OFFSET), vmalloc (VMALLOC_START) and vmemmap (VMEMMAP_START). Adding these variables on VMCOREINFO so tools can easily identify the base of each memory section. Link: http://lkml.kernel.org/r/1471531632-23003-1-git-send-email-thgarnie@google.com Signed-off-by: Thomas Garnier <thgarnie@google.com> Acked-by: Baoquan He <bhe@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Xunlei Pang <xlpang@redhat.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Kees Cook <keescook@chromium.org> Cc: Eugene Surovegin <surovegin@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/machine_kexec_64.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 5a294e48b185..8c1f218926d7 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -337,6 +337,9 @@ void arch_crash_save_vmcoreinfo(void)
#endif
vmcoreinfo_append_str("KERNELOFFSET=%lx\n",
kaslr_offset());
+ VMCOREINFO_PAGE_OFFSET(PAGE_OFFSET);
+ VMCOREINFO_VMALLOC_START(VMALLOC_START);
+ VMCOREINFO_VMEMMAP_START(VMEMMAP_START);
}
/* arch-dependent functionality related to kexec file-based syscall */