clk: renesas: cpg-mssr: Fix memory leak in cpg_mssr_reserved_init()

[ Upstream commit cc55fc58fc1b7f405003fd2ecf79e74653461f0b ]

In case of krealloc_array() failure, the current error handling just
returns from the function without freeing the original array.
Fix this memory leak by freeing the original array.

Fixes: 6aa1754764901668 ("clk: renesas: cpg-mssr: Ignore all clocks assigned to non-Linux system")
Signed-off-by: Yuan CHen <chenyuan@kylinos.cn>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20250908012810.4767-1-chenyuan_fl@163.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index 0f27c33192e10dda2bed40f75571e448252e4c80..112ed81f648eece0dfda8acac3a785bba1187c9c 100644 (file)
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -1012,6 +1012,7 @@ static int __init cpg_mssr_reserved_init(struct cpg_mssr_priv *priv,
 
                of_for_each_phandle(&it, rc, node, "clocks", "#clock-cells", -1) {
                        int idx;
+                       unsigned int *new_ids;
 
                        if (it.node != priv->np)
                                continue;
@@ -1022,11 +1023,13 @@ static int __init cpg_mssr_reserved_init(struct cpg_mssr_priv *priv,
                        if (args[0] != CPG_MOD)
                                continue;
 
-                       ids = krealloc_array(ids, (num + 1), sizeof(*ids), GFP_KERNEL);
-                       if (!ids) {
+                       new_ids = krealloc_array(ids, (num + 1), sizeof(*ids), GFP_KERNEL);
+                       if (!new_ids) {
                                of_node_put(it.node);
+                               kfree(ids);
                                return -ENOMEM;
                        }
+                       ids = new_ids;
 
                        if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
                                idx = MOD_CLK_PACK_10(args[1]); /* for DEF_MOD_STB() */