EDAC: Handle return value of kasprintf()

kasprintf() can fail and we must check its return value.
Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com>
Cc: linux-edac@vger.kernel.org
[ Merged into a single patch, small formatting fixups. ]
Signed-off-by: NBorislav Petkov <bp@suse.de>

drivers/edac/i7core_edac.c

@@ -2159,8 +2159,13 @@ static int i7core_register_mci(struct i7core_dev *i7core_dev)
 	mci->edac_ctl_cap = EDAC_FLAG_NONE;
 	mci->edac_cap = EDAC_FLAG_NONE;
 	mci->mod_name = "i7core_edac.c";
-	mci->ctl_name = kasprintf(GFP_KERNEL, "i7 core #%d",
-				  i7core_dev->socket);
+
+	mci->ctl_name = kasprintf(GFP_KERNEL, "i7 core #%d", i7core_dev->socket);
+	if (!mci->ctl_name) {
+		rc = -ENOMEM;
+		goto fail1;
+	}
+
 	mci->dev_name = pci_name(i7core_dev->pdev[0]);
 	mci->ctl_page_to_phys = NULL;
 
@@ -2214,6 +2219,8 @@ static int i7core_register_mci(struct i7core_dev *i7core_dev)
 
 fail0:
 	kfree(mci->ctl_name);
+
+fail1:
 	edac_mc_free(mci);
 	i7core_dev->mci = NULL;
 	return rc;

drivers/edac/sb_edac.c

@@ -3287,6 +3287,11 @@ static int sbridge_register_mci(struct sbridge_dev *sbridge_dev, enum type type)
 		break;
 	}
 
+	if (!mci->ctl_name) {
+		rc = -ENOMEM;
+		goto fail0;
+	}
+
 	/* Get dimm basic config and the memory layout */
 	rc = get_dimm_config(mci);
 	if (rc < 0) {

drivers/edac/skx_edac.c

@@ -464,8 +464,12 @@ static int skx_register_mci(struct skx_imc *imc)
 	pvt = mci->pvt_info;
 	pvt->imc = imc;
 
-	mci->ctl_name = kasprintf(GFP_KERNEL, "Skylake Socket#%d IMC#%d",
-				  imc->node_id, imc->lmc);
+	mci->ctl_name = kasprintf(GFP_KERNEL, "Skylake Socket#%d IMC#%d", imc->node_id, imc->lmc);
+	if (!mci->ctl_name) {
+		rc = -ENOMEM;
+		goto fail0;
+	}
+
 	mci->mtype_cap = MEM_FLAG_DDR4;
 	mci->edac_ctl_cap = EDAC_FLAG_NONE;
 	mci->edac_cap = EDAC_FLAG_NONE;
@@ -491,6 +495,7 @@ static int skx_register_mci(struct skx_imc *imc)
 
 fail:
 	kfree(mci->ctl_name);
+fail0:
 	edac_mc_free(mci);
 	imc->mci = NULL;
 	return rc;