[PATCH] module: Enable dynamic debugging regardless of taint

[Ben Hutchings]

Dynamic debugging is currently disabled for tainted modules, except
for TAINT_CRAP.  This prevents use of dynamic debugging for
out-of-tree modules now that they are also tainted.

This condition was apparently intended to avoid a crash if a force-
loaded module has an incompatible definition of dynamic debug
structures.  However, a administrator that forces us to load a module
is claiming that it *is* compatible even though it fails our version
checks.  If they are mistaken, there are any number of ways the module
could crash the system.

Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 kernel/module.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/module.c b/kernel/module.c
index dab585e..ef8cb70 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2881,8 +2881,7 @@ static struct module *load_module(void __user *umod,
 	}
 
 	/* This has to be done once we're sure module name is unique. */
-	if (!mod->taints || mod->taints == (1U<<TAINT_CRAP))
-		dynamic_debug_setup(info.debug, info.num_debug);
+	dynamic_debug_setup(info.debug, info.num_debug);
 
 	/* Find duplicate symbols */
 	err = verify_export_symbols(mod);
@@ -2918,8 +2917,7 @@ static struct module *load_module(void __user *umod,
 	module_bug_cleanup(mod);
 
  ddebug:
-	if (!mod->taints || mod->taints == (1U<<TAINT_CRAP))
-		dynamic_debug_remove(info.debug);
+	dynamic_debug_remove(info.debug);
  unlock:
 	mutex_unlock(&module_mutex);
 	synchronize_sched();
-- 
1.7.7


-- 
Ben Hutchings
Computers are not intelligent.	They only think they are.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/