x86/intel_rdt: Fix memory leak on mount failure

If mount fails, the kn_info directory is not freed causing memory leak.

Add the missing error handling path.

Fixes: 4e978d06dedb ("x86/intel_rdt: Add "info" files to resctrl file system")
Signed-off-by: Vikas Shivappa <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]

diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index f5af0cc7eb0d18bc9f52177c182d73500e7f3e7f..9257bd9dc6640bd2b1eff8e6cfb7021139332530 100644 (file)
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -856,11 +856,13 @@ static struct dentry *rdt_mount(struct file_system_type *fs_type,
        dentry = kernfs_mount(fs_type, flags, rdt_root,
                              RDTGROUP_SUPER_MAGIC, NULL);
        if (IS_ERR(dentry))
-               goto out_cdp;
+               goto out_destroy;
 
        static_branch_enable(&rdt_enable_key);
        goto out;
 
+out_destroy:
+       kernfs_remove(kn_info);
 out_cdp:
        cdp_disable();
 out: