add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/net/can/bcm.c
..
..
@@ -936,6 +936,8 @@
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 			cf = op->frames + op->cfsiz * i;
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 			err = memcpy_from_msg((u8 *)cf, msg, op->cfsiz);
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+			if (err < 0)
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+				goto free_op;
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 			if (op->flags & CAN_FD_FRAME) {
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 				if (cf->len > 64)
..
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@@ -945,12 +947,8 @@
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 					err = -EINVAL;
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 			}
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-			if (err < 0) {
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-				if (op->frames != &op->sframe)
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-					kfree(op->frames);
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-				kfree(op);
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-				return err;
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-			}
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+			if (err < 0)
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+				goto free_op;
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 			if (msg_head->flags & TX_CP_CAN_ID) {
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 				/* copy can_id into frame */
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@@ -1021,6 +1019,12 @@
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 		bcm_tx_start_timer(op);
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 	return msg_head->nframes * op->cfsiz + MHSIZ;
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+
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+free_op:
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+	if (op->frames != &op->sframe)
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+		kfree(op->frames);
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+	kfree(op);
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+	return err;
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 }
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 /*
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@@ -1517,6 +1521,12 @@
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 	lock_sock(sk);
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+#if IS_ENABLED(CONFIG_PROC_FS)
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+	/* remove procfs entry */
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+	if (net->can.bcmproc_dir && bo->bcm_proc_read)
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+		remove_proc_entry(bo->procname, net->can.bcmproc_dir);
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+#endif /* CONFIG_PROC_FS */
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+
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 	list_for_each_entry_safe(op, next, &bo->tx_ops, list)
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 		bcm_remove_op(op);
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..
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@@ -1551,12 +1561,6 @@
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 	list_for_each_entry_safe(op, next, &bo->rx_ops, list)
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 		bcm_remove_op(op);
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-
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-#if IS_ENABLED(CONFIG_PROC_FS)
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-	/* remove procfs entry */
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-	if (net->can.bcmproc_dir && bo->bcm_proc_read)
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-		remove_proc_entry(bo->procname, net->can.bcmproc_dir);
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-#endif /* CONFIG_PROC_FS */
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 	/* remove device reference */
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 	if (bo->bound) {