From: Jason Baron <jbaron@redhat.com>
Date: Tue, 27 Jul 2010 20:18:01 +0000 (-0700)
Subject: dynamic debug: move ddebug_remove_module() down into free_module()
X-Git-Tag: firefly_0821_release~9833^2~1350
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b82bab4bbe9efa7bc7177fc20620fff19bd95484;p=firefly-linux-kernel-4.4.55.git

dynamic debug: move ddebug_remove_module() down into free_module()

The command

	echo "file ec.c +p" >/sys/kernel/debug/dynamic_debug/control

causes an oops.

Move the call to ddebug_remove_module() down into free_module().  In this
way it should be called from all error paths.  Currently, we are missing
the remove if the module init routine fails.

Signed-off-by: Jason Baron <jbaron@redhat.com>
Reported-by: Thomas Renninger <trenn@suse.de>
Tested-by: Thomas Renninger <trenn@suse.de>
Cc: <stable@kernel.org>		[2.6.32+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/kernel/module.c b/kernel/module.c
index 5d2d28197c82..6c562828c85c 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -787,7 +787,6 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
 
 	/* Store the name of the last unloaded module for diagnostic purposes */
 	strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
-	ddebug_remove_module(mod->name);
 
 	free_module(mod);
 	return 0;
@@ -1550,6 +1549,9 @@ static void free_module(struct module *mod)
 	remove_sect_attrs(mod);
 	mod_kobject_remove(mod);
 
+	/* Remove dynamic debug info */
+	ddebug_remove_module(mod->name);
+
 	/* Arch-specific cleanup. */
 	module_arch_cleanup(mod);