[1/8] clk: vc5: check memory returned by kasprintf()
Commit Message
kasprintf() returns a pointer to dynamically allocated memory.
Pointer could be NULL in case allocation fails. Check pointer validity.
Identified with coccinelle (kmerr.cocci script).
Fixes: f491276a5168 ("clk: vc5: Allow Versaclock driver to support multiple instances")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
drivers/clk/clk-versaclock5.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
Comments
Hi Claudiu,
On Tue, 30 May 2023 12:39:06 +0300
Claudiu Beznea <claudiu.beznea@microchip.com> wrote:
> kasprintf() returns a pointer to dynamically allocated memory.
> Pointer could be NULL in case allocation fails. Check pointer validity.
> Identified with coccinelle (kmerr.cocci script).
>
> Fixes: f491276a5168 ("clk: vc5: Allow Versaclock driver to support multiple instances")
> Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
I think this driver would benefit a bit of refactoring, moving all
those similar sections to a single function.
But for the time being your change is fine:
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Quoting Claudiu Beznea (2023-05-30 02:39:06)
> kasprintf() returns a pointer to dynamically allocated memory.
> Pointer could be NULL in case allocation fails. Check pointer validity.
> Identified with coccinelle (kmerr.cocci script).
>
> Fixes: f491276a5168 ("clk: vc5: Allow Versaclock driver to support multiple instances")
> Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
> ---
Applied to clk-next
@@ -1028,6 +1028,11 @@ static int vc5_probe(struct i2c_client *client)
}
init.name = kasprintf(GFP_KERNEL, "%pOFn.mux", client->dev.of_node);
+ if (!init.name) {
+ ret = -ENOMEM;
+ goto err_clk;
+ }
+
init.ops = &vc5_mux_ops;
init.flags = 0;
init.parent_names = parent_names;
@@ -1042,6 +1047,10 @@ static int vc5_probe(struct i2c_client *client)
memset(&init, 0, sizeof(init));
init.name = kasprintf(GFP_KERNEL, "%pOFn.dbl",
client->dev.of_node);
+ if (!init.name) {
+ ret = -ENOMEM;
+ goto err_clk;
+ }
init.ops = &vc5_dbl_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_names;
@@ -1057,6 +1066,10 @@ static int vc5_probe(struct i2c_client *client)
/* Register PFD */
memset(&init, 0, sizeof(init));
init.name = kasprintf(GFP_KERNEL, "%pOFn.pfd", client->dev.of_node);
+ if (!init.name) {
+ ret = -ENOMEM;
+ goto err_clk;
+ }
init.ops = &vc5_pfd_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_names;
@@ -1074,6 +1087,10 @@ static int vc5_probe(struct i2c_client *client)
/* Register PLL */
memset(&init, 0, sizeof(init));
init.name = kasprintf(GFP_KERNEL, "%pOFn.pll", client->dev.of_node);
+ if (!init.name) {
+ ret = -ENOMEM;
+ goto err_clk;
+ }
init.ops = &vc5_pll_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_names;
@@ -1093,6 +1110,10 @@ static int vc5_probe(struct i2c_client *client)
memset(&init, 0, sizeof(init));
init.name = kasprintf(GFP_KERNEL, "%pOFn.fod%d",
client->dev.of_node, idx);
+ if (!init.name) {
+ ret = -ENOMEM;
+ goto err_clk;
+ }
init.ops = &vc5_fod_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_names;
@@ -1111,6 +1132,10 @@ static int vc5_probe(struct i2c_client *client)
memset(&init, 0, sizeof(init));
init.name = kasprintf(GFP_KERNEL, "%pOFn.out0_sel_i2cb",
client->dev.of_node);
+ if (!init.name) {
+ ret = -ENOMEM;
+ goto err_clk;
+ }
init.ops = &vc5_clk_out_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_names;
@@ -1137,6 +1162,10 @@ static int vc5_probe(struct i2c_client *client)
memset(&init, 0, sizeof(init));
init.name = kasprintf(GFP_KERNEL, "%pOFn.out%d",
client->dev.of_node, idx + 1);
+ if (!init.name) {
+ ret = -ENOMEM;
+ goto err_clk;
+ }
init.ops = &vc5_clk_out_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_names;