linux-kernel - [PATCH v2 06/20] vmcore, procfs: introduce a flag to distinguish objects copied in 2nd kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130302083622.31252.38843.stgit@localhost6.localdomain6>
Date:	Sat, 02 Mar 2013 17:36:22 +0900
From:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
To:	vgoyal@...hat.com, ebiederm@...ssion.com, cpw@....com,
	kumagai-atsushi@....nes.nec.co.jp, lisa.mitchell@...com,
	heiko.carstens@...ibm.com, akpm@...ux-foundation.org
Cc:	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 06/20] vmcore,
 procfs: introduce a flag to distinguish objects copied in 2nd kernel

The part of dump target memory is copied into the 2nd kernel if it
doesn't satisfy mmap()'s page-size boundary requirement. To
distinguish such copied object from usual old memory, a flag
MEM_TYPE_CURRENT_KERNEL is introduced. If this flag is set, the object
is considered being copied into buffer on the 2nd kernel.

Signed-off-by: HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
---

 include/linux/proc_fs.h |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 8307f2f..11dd592 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -97,11 +97,17 @@ struct kcore_list {
 	int type;
 };
 
+#define MEM_TYPE_CURRENT_KERNEL 0x1
+
 struct vmcore {
 	struct list_head list;
-	unsigned long long paddr;
+	union {
+		unsigned long long paddr;
+		char *buf;
+	};
 	unsigned long long size;
 	loff_t offset;
+	unsigned int flag;
 };
 
 #ifdef CONFIG_PROC_FS

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/