From: Greg Kroah-Hartman gregkh@linuxfoundation.org
[ Upstream commit 2bb3669f576559db273efe49e0e69f82450efbca ]
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: Andrew Morton akpm@linux-foundation.org Reviewed-by: Yang Yingliang yangyingliang@huawei.com Link: https://lore.kernel.org/r/20230202151633.2310897-1-gregkh@linuxfoundation.or... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/fail_function.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/kernel/fail_function.c b/kernel/fail_function.c index a7ccd2930c5f4..d971a01893197 100644 --- a/kernel/fail_function.c +++ b/kernel/fail_function.c @@ -163,10 +163,7 @@ static void fei_debugfs_add_attr(struct fei_attr *attr)
static void fei_debugfs_remove_attr(struct fei_attr *attr) { - struct dentry *dir; - - dir = debugfs_lookup(attr->kp.symbol_name, fei_debugfs_dir); - debugfs_remove_recursive(dir); + debugfs_lookup_and_remove(attr->kp.symbol_name, fei_debugfs_dir); }
static int fei_kprobe_handler(struct kprobe *kp, struct pt_regs *regs)