From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>,
Seth Jennings <sjenning@redhat.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Steven Rostedt <rostedt@goodmis.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>, Jiri Slaby <jslaby@suse.cz>
Cc: linux-kernel@vger.kernel.org
Subject: [RFC PATCH 1/2] kpatch: add TAINT_KPATCH flag
Date: Thu, 1 May 2014 10:52:05 -0500 [thread overview]
Message-ID: <ba6ea704e4ba2b1cdd2422873b8d217f7a2619d8.1398958771.git.jpoimboe@redhat.com> (raw)
In-Reply-To: <cover.1398958771.git.jpoimboe@redhat.com>
Add a TAINT_KPATCH flag to be set whenever a kpatch patch module
successfully replaces a function.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Seth Jennings <sjenning@redhat.com>
---
Documentation/oops-tracing.txt | 3 +++
Documentation/sysctl/kernel.txt | 1 +
include/linux/kernel.h | 1 +
kernel/panic.c | 2 ++
4 files changed, 7 insertions(+)
diff --git a/Documentation/oops-tracing.txt b/Documentation/oops-tracing.txt
index e315599..2ed7ed1 100644
--- a/Documentation/oops-tracing.txt
+++ b/Documentation/oops-tracing.txt
@@ -268,6 +268,9 @@ characters, each representing a particular tainted value.
14: 'E' if an unsigned module has been loaded in a kernel supporting
module signature.
+ 15: 'H' if a kpatch hot patch module has replaced any functions in the
+ running kernel.
+
The primary reason for the 'Tainted: ' string is to tell kernel
debuggers if this is a clean kernel or if anything unusual has
occurred. Tainting is permanent: even if an offending module is
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 9886c3d..7d31b1e 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -788,6 +788,7 @@ can be ORed together:
4096 - An out-of-tree module has been loaded.
8192 - An unsigned module has been loaded in a kernel supporting module
signature.
+16384 - A kpatch module has replaced a function in the running kernel.
==============================================================
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4c52907..cdfbe73 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -470,6 +470,7 @@ extern enum system_states {
#define TAINT_FIRMWARE_WORKAROUND 11
#define TAINT_OOT_MODULE 12
#define TAINT_UNSIGNED_MODULE 13
+#define TAINT_KPATCH 14
extern const char hex_asc[];
#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
diff --git a/kernel/panic.c b/kernel/panic.c
index d02fa9f..2c04a88 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -212,6 +212,7 @@ static const struct tnt tnts[] = {
{ TAINT_FIRMWARE_WORKAROUND, 'I', ' ' },
{ TAINT_OOT_MODULE, 'O', ' ' },
{ TAINT_UNSIGNED_MODULE, 'E', ' ' },
+ { TAINT_KPATCH, 'H', ' ' },
};
/**
@@ -231,6 +232,7 @@ static const struct tnt tnts[] = {
* 'I' - Working around severe firmware bug.
* 'O' - Out-of-tree module has been loaded.
* 'E' - Unsigned module has been loaded.
+ * 'H' - kpatch replaced a function.
*
* The string is overwritten by the next call to print_tainted().
*/
--
1.9.0
next prev parent reply other threads:[~2014-05-01 15:52 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-01 15:52 [RFC PATCH 0/2] kpatch: dynamic kernel patching Josh Poimboeuf
2014-05-01 15:52 ` Josh Poimboeuf [this message]
2014-05-01 15:52 ` [RFC PATCH 2/2] kpatch: add kpatch core module Josh Poimboeuf
2014-05-01 20:45 ` [RFC PATCH 0/2] kpatch: dynamic kernel patching Andi Kleen
2014-05-01 21:01 ` Josh Poimboeuf
2014-05-01 21:06 ` Andi Kleen
2014-05-01 21:27 ` Josh Poimboeuf
2014-05-01 21:39 ` Josh Poimboeuf
2014-05-02 1:30 ` Masami Hiramatsu
2014-05-02 8:37 ` Jiri Kosina
2014-05-02 13:29 ` Josh Poimboeuf
2014-05-02 13:10 ` Jiri Kosina
2014-05-02 13:37 ` Josh Poimboeuf
2014-05-05 23:34 ` David Lang
2014-05-05 23:52 ` Jiri Kosina
2014-05-06 1:59 ` David Lang
2014-05-06 12:17 ` Josh Poimboeuf
2014-05-06 7:32 ` Ingo Molnar
2014-05-06 8:03 ` Jiri Kosina
2014-05-06 12:23 ` Josh Poimboeuf
2014-05-07 12:19 ` Ingo Molnar
2014-05-09 1:46 ` David Lang
2014-05-09 2:45 ` Steven Rostedt
2014-05-09 4:07 ` Masami Hiramatsu
2014-05-05 8:55 ` Ingo Molnar
2014-05-05 13:26 ` Josh Poimboeuf
2014-05-05 14:10 ` Frederic Weisbecker
2014-05-05 18:43 ` Ingo Molnar
2014-05-05 21:49 ` Frederic Weisbecker
2014-05-06 12:12 ` Josh Poimboeuf
2014-05-06 12:33 ` Steven Rostedt
2014-05-06 22:49 ` Masami Hiramatsu
2014-05-06 14:05 ` Frederic Weisbecker
2014-05-06 14:50 ` Josh Poimboeuf
2014-05-07 12:24 ` Ingo Molnar
2014-05-07 15:41 ` Josh Poimboeuf
2014-05-07 15:57 ` Ingo Molnar
2014-05-07 16:43 ` Josh Poimboeuf
2014-05-07 22:56 ` David Lang
2014-05-08 6:12 ` Ingo Molnar
2014-05-08 6:50 ` David Lang
2014-05-08 7:08 ` Ingo Molnar
2014-05-08 7:29 ` Masami Hiramatsu
2014-05-08 12:48 ` Josh Poimboeuf
2014-05-09 6:21 ` Masami Hiramatsu
2014-06-14 20:31 ` Pavel Machek
2014-06-15 6:57 ` Ingo Molnar
2014-05-06 11:45 ` Masami Hiramatsu
2014-05-06 12:26 ` Steven Rostedt
2014-05-06 22:33 ` Masami Hiramatsu
2014-05-16 16:27 ` Jiri Kosina
2014-05-16 17:14 ` Josh Poimboeuf
2014-05-20 9:37 ` Jiri Kosina
2014-05-20 12:59 ` Josh Poimboeuf
2014-05-16 18:09 ` Masami Hiramatsu
2014-05-17 22:46 ` Vojtech Pavlik
2014-05-16 18:55 ` Steven Rostedt
2014-05-16 22:32 ` Jiri Kosina
2014-05-17 0:27 ` Steven Rostedt
2014-05-17 7:10 ` Jiri Kosina
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