Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH] kernel/printk/index.c: fix memory leak with using debugfs_lookup() | Date | Thu, 2 Feb 2023 16:14:11 +0100 |
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When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once.
Cc: Chris Down <chris@chrisdown.name> Cc: Petr Mladek <pmladek@suse.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: John Ogness <john.ogness@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- kernel/printk/index.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/printk/index.c b/kernel/printk/index.c index c85be186a783..a6b27526baaf 100644 --- a/kernel/printk/index.c +++ b/kernel/printk/index.c @@ -145,7 +145,7 @@ static void pi_create_file(struct module *mod) #ifdef CONFIG_MODULES static void pi_remove_file(struct module *mod) { - debugfs_remove(debugfs_lookup(pi_get_module_name(mod), dfs_index)); + debugfs_lookup_and_remove(pi_get_module_name(mod), dfs_index); } static int pi_module_notify(struct notifier_block *nb, unsigned long op, -- 2.39.1
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