>
> On RHEL5 Xen kernel, it shows multiple garbage graphic characters, and I
> cannot even transpose it, because it must have a CR, LF, or something else
> embedded in the garbarge.
>
> If you want to re-post, fix the module list truncation issue, try to do
> something to handle kernel versions that do not have the same #define's
> as what you're hardwiring, and perhaps make it into a "mod -t" option
> that displays just the module name and its TAINT flag.
>
> Dave
>
Hi Dave,
Firstly, sorry for the delay.
Here's another attempt.
An example:
crash> linux_banner
linux_banner = $3 = "Linux version 2.6.32-220.28.1.el6.x86_64
([email protected]) (gcc version 4.4.6 20110731 (Red
Hat 4.4.6-3) (GCC) ) #1 SMP Wed Oct 3 12:26:28 EDT 2012\n"
crash> mod -T
NAME TAINT
vxspec (P)(U)
dmpaa (P)(U)
emcpgpx (P)(U)
dmpap (P)(U)
dmpjbod (P)(U)
emcp (P)(U)
emcpmpx (P)(U)
emcpdm (P)(U)
emcpxcrypt (P)(U)
emcpvlumd (P)(U)
vxfs (P)(U)
fdd (P)(U)
vxportal (P)(U)
vxdmp (P)(U)
vxio (P)(U)
llt (P)(U)
gab (P)(U)
vxfen (P)(U)
vxglm (P)(U)
vxgms (P)(U)
vxodm (P)(U)
crash> mod -t vxfs
NAME TAINT
vxfs (P)(U)
--8<--
$ diffstat show-mod-taint-flags-v2.patch
defs.h | 11 ++++
kernel.c | 150 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 160 insertions(+), 1 deletion(-)
--- kernel.c.orig 2013-02-14 20:38:54.000000000 +0000
+++ kernel.c 2013-04-05 12:52:34.364149700 +0100
@@ -3159,6 +3159,8 @@
#define DELETE_ALL_MODULE_SYMBOLS (5)
#define REMOTE_MODULE_SAVE_MSG (6)
#define REINIT_MODULES (7)
+#define LIST_ALL_MODULE_TAINT (8)
+#define LIST_SPECIFIED_MODULE_TAINT (9)
void
cmd_mod(void)
@@ -3233,7 +3235,7 @@
address = 0;
flag = LIST_MODULE_HDR;
- while ((c = getopt(argcnt, args, "Rd:Ds:So")) != EOF) {
+ while ((c = getopt(argcnt, args, "Rd:Ds:SoTt:")) != EOF) {
switch(c)
{
case 'R':
@@ -3304,6 +3306,25 @@
cmd_usage(pc->curcmd, SYNOPSIS);
break;
+ case 'T':
+ if (flag)
+ cmd_usage(pc->curcmd, SYNOPSIS);
+ else
+ flag = LIST_ALL_MODULE_TAINT;
+ break;
+
+ case 't':
+ if (flag)
+ cmd_usage(pc->curcmd, SYNOPSIS);
+ else
+ flag = LIST_SPECIFIED_MODULE_TAINT;
+
+ if (is_module_name(optarg, &address, NULL))
+ modref = optarg;
+ else
+ cmd_usage(pc->curcmd, SYNOPSIS);
+ break;
+
default:
argerrs++;
break;
@@ -3424,6 +3445,125 @@
return retval;
}
+#define MAXTAINTLEN 12
+
+int
+is_module_taint(struct load_module *lm, char *buf)
+{
+ int gpgsig_ok;
+ unsigned int taints;
+ int bx = 0;
+ int found = FALSE;
+
+ BZERO(buf, MAXTAINTLEN);
+
+ if (MEMBER_EXISTS("module", "taints")) {
+ readmem(lm->module_struct + MEMBER_OFFSET("module", "taints"),
+ KVADDR, &taints, sizeof(ulong), "module taints",
+ FAULT_ON_ERROR);
+
+ if (taints) {
+ buf[bx++] = '(';
+ if (taints & (1 << TAINT_PROPRIETARY_MODULE)) {
+ buf[bx++] = 'P';
+ found = TRUE;
+ }
+
+ if (taints & (1 << TAINT_OOT_MODULE)) {
+ buf[bx++] = 'O';
+ found = TRUE;
+ }
+
+ if (taints & (1 << TAINT_FORCED_MODULE)) {
+ buf[bx++] = 'F';
+ found = TRUE;
+ }
+
+ if (taints & (1 << TAINT_UNSIGNED_MODULE)) {
+ buf[bx++] = 'U';
+ found = TRUE;
+ }
+
+ if (taints & (1 << TAINT_CRAP)) {
+ buf[bx++] = 'C';
+ found = TRUE;
+ }
+
+ if (taints & (1 << TAINT_TECH_PREVIEW)) {
+ buf[bx++] = 'T';
+ found = TRUE;
+ }
+ buf[bx++] = ')';
+ }
+ }
+
+ if (MEMBER_EXISTS("module", "gpgsig_ok")) {
+ readmem(lm->module_struct + MEMBER_OFFSET("module", "gpgsig_ok"),
+ KVADDR, &gpgsig_ok, sizeof(int), "module gpgsig_ok",
+ FAULT_ON_ERROR);
+
+ if (!gpgsig_ok) {
+ buf[bx++] = '(';
+ buf[bx++] = 'U';
+ buf[bx++] = ')';
+ found = TRUE;
+ }
+ }
+ return found;
+}
+
+void
+show_module_taint(ulong addr)
+{
+ int i, bx = 0;
+ struct load_module *lm;
+ int maxnamelen = 0;
+ char buf[MAXTAINTLEN];
+ char buf1[BUFSIZE];
+ char buf2[BUFSIZE];
+ int found;
+
+ for (i = 0; i < kt->mods_installed; i++) {
+ lm = &st->load_modules[i];
+ maxnamelen = strlen(lm->mod_name) > maxnamelen ?
+ strlen(lm->mod_name) : maxnamelen;
+ }
+
+ fprintf(fp, "%s %s\n",
+ mkstring(buf1, maxnamelen, LJUST, "NAME"),
+ mkstring(buf2, MAXTAINTLEN, LJUST, "TAINT"));
+
+ if (addr == ALL_MODULES) {
+ for (i = 0; i < st->mods_installed; i++) {
+ lm = &st->load_modules[i];
+
+ found = is_module_taint(lm, buf);
+
+ if (found) {
+ fprintf(fp, "%s ", mkstring(buf1, maxnamelen,
+ LJUST, lm->mod_name));
+ fprintf(fp, "%s\n", mkstring(buf2, MAXTAINTLEN,
+ LJUST, buf));
+ }
+ }
+ } else {
+ for (i = 0; i < st->mods_installed; i++) {
+ lm = &st->load_modules[i];
+
+ if (lm->mod_base == addr) {
+ found = is_module_taint(lm, buf);
+
+ if (found) {
+ fprintf(fp, "%s ", mkstring(buf1, maxnamelen,
+ LJUST, lm->mod_name));
+ fprintf(fp, "%s\n", mkstring(buf2, MAXTAINTLEN,
+ LJUST, buf));
+ break;
+ }
+ }
+ }
+ }
+}
/*
* Do the simple list work for cmd_mod().
@@ -3594,6 +3734,14 @@
reinit_modules();
do_module_cmd(LIST_MODULE_HDR, NULL, 0, NULL, NULL);
break;
+
+ case LIST_ALL_MODULE_TAINT:
+ show_module_taint(ALL_MODULES);
+ break;
+
+ case LIST_SPECIFIED_MODULE_TAINT:
+ show_module_taint(address);
+ break;
}
}
--- defs.h.orig 2013-02-14 20:38:54.000000000 +0000
+++ defs.h 2013-04-05 12:52:34.368149701 +0100
@@ -177,6 +177,17 @@
};
/*
+* Module taint flags
+*/
+
+#define TAINT_PROPRIETARY_MODULE 0
+#define TAINT_FORCED_MODULE 1
+#define TAINT_UNSIGNED_MODULE 6
+#define TAINT_CRAP 10
+#define TAINT_OOT_MODULE 12
+#define TAINT_TECH_PREVIEW 29
+
+/*
* program_context flags
*/
#define LIVE_SYSTEM (0x1ULL)
--
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