Messages in this thread Patch in this message | | | From | Josh Poimboeuf <> | Subject | [PATCH v2 1/2] kpatch: add TAINT_KPATCH flag | Date | Mon, 14 Jul 2014 20:37:06 -0500 |
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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..cd89895 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: 'K' 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 c14374e..1009d22 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -826,6 +826,7 @@ 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 62e16ce..e780909 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -224,6 +224,7 @@ static const struct tnt tnts[] = { { TAINT_FIRMWARE_WORKAROUND, 'I', ' ' }, { TAINT_OOT_MODULE, 'O', ' ' }, { TAINT_UNSIGNED_MODULE, 'E', ' ' }, + { TAINT_KPATCH, 'K', ' ' }, }; /** @@ -243,6 +244,7 @@ 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. + * 'K' - kpatch replaced a function. * * The string is overwritten by the next call to print_tainted(). */ -- 1.9.3
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