Commit c5f45465 authored by Seth Jennings's avatar Seth Jennings Committed by Jiri Kosina

livepatch: kernel: add TAINT_LIVEPATCH

This adds a new taint flag to indicate when the kernel or a kernel
module has been live patched.  This will provide a clean indication in
bug reports that live patching was used.

Additionally, if the crash occurs in a live patched function, the live
patch module will appear beside the patched function in the backtrace.
Signed-off-by: default avatarSeth Jennings <sjenning@redhat.com>
Acked-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: default avatarMiroslav Benes <mbenes@suse.cz>
Reviewed-by: default avatarPetr Mladek <pmladek@suse.cz>
Reviewed-by: default avatarMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 97bf6af1
......@@ -270,6 +270,8 @@ characters, each representing a particular tainted value.
15: 'L' if a soft lockup has previously occurred on the system.
16: 'K' if the kernel has been live patched.
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
......
......@@ -843,6 +843,7 @@ can be ORed together:
8192 - An unsigned module has been loaded in a kernel supporting module
signature.
16384 - A soft lockup has previously occurred on the system.
32768 - The kernel has been live patched.
==============================================================
......
......@@ -471,6 +471,7 @@ extern enum system_states {
#define TAINT_OOT_MODULE 12
#define TAINT_UNSIGNED_MODULE 13
#define TAINT_SOFTLOCKUP 14
#define TAINT_LIVEPATCH 15
extern const char hex_asc[];
#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
......
......@@ -226,6 +226,7 @@ static const struct tnt tnts[] = {
{ TAINT_OOT_MODULE, 'O', ' ' },
{ TAINT_UNSIGNED_MODULE, 'E', ' ' },
{ TAINT_SOFTLOCKUP, 'L', ' ' },
{ TAINT_LIVEPATCH, 'K', ' ' },
};
/**
......@@ -246,6 +247,7 @@ static const struct tnt tnts[] = {
* 'O' - Out-of-tree module has been loaded.
* 'E' - Unsigned module has been loaded.
* 'L' - A soft lockup has previously occurred.
* 'K' - Kernel has been live patched.
*
* The string is overwritten by the next call to print_tainted().
*/
......
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