diff mbox series

[v2,1/2] platform/x86: think-lmi: Fix memory leaks when parsing ThinkStation WMI strings

Message ID 20230403013120.2105-1-mpearson-lenovo@squebb.ca
State New
Headers
Series [v2,1/2] platform/x86: think-lmi: Fix memory leaks when parsing ThinkStation WMI strings |

Commit Message

Mark Pearson April 3, 2023, 1:31 a.m. UTC 
  My previous commit introduced a memory leak where the item allocated
from tlmi_setting was not freed.
This commit also renames it to avoid confusion with the similarly name
variable in the same function.

Fixes: 8a02d70679fc ("platform/x86: think-lmi: Add possible_values for ThinkStation")
Reported-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Link: https://lore.kernel.org/lkml/df26ff45-8933-f2b3-25f4-6ee51ccda7d8@gmx.de/T/
Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
---
This patch series builds on top of the proposed patch from Armin Wolf
"platform/x86: think-lmi: Fix memory leak when showing current settings"
Changes in v2: None, but rebased series because of issues with second
patch.

 drivers/platform/x86/think-lmi.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Comments

Hans de Goede April 3, 2023, 9:43 a.m. UTC | #1 
Hi,

On 4/3/23 03:31, Mark Pearson wrote:
> My previous commit introduced a memory leak where the item allocated
> from tlmi_setting was not freed.
> This commit also renames it to avoid confusion with the similarly name
> variable in the same function.
> 
> Fixes: 8a02d70679fc ("platform/x86: think-lmi: Add possible_values for ThinkStation")
> Reported-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
> Link: https://lore.kernel.org/lkml/df26ff45-8933-f2b3-25f4-6ee51ccda7d8@gmx.de/T/
> Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
> ---
> This patch series builds on top of the proposed patch from Armin Wolf
> "platform/x86: think-lmi: Fix memory leak when showing current settings"
> Changes in v2: None, but rebased series because of issues with second
> patch.

Thank you for your patch series, I've applied this series
to my fixes branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes

Note it will show up in my fixes branch once I've pushed my
local branch there, which might take a while.

I will include this series in my next fixes pull-req to Linus
for the current kernel development cycle.

Regards,

Hans




> 
>  drivers/platform/x86/think-lmi.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
> index 6034df6d577d..87f832142d8d 100644
> --- a/drivers/platform/x86/think-lmi.c
> +++ b/drivers/platform/x86/think-lmi.c
> @@ -1459,10 +1459,10 @@ static int tlmi_analyze(void)
>  			 * name string.
>  			 * Try and pull that out if it's available.
>  			 */
> -			char *item, *optstart, *optend;
> +			char *optitem, *optstart, *optend;
>  
> -			if (!tlmi_setting(setting->index, &item, LENOVO_BIOS_SETTING_GUID)) {
> -				optstart = strstr(item, "[Optional:");
> +			if (!tlmi_setting(setting->index, &optitem, LENOVO_BIOS_SETTING_GUID)) {
> +				optstart = strstr(optitem, "[Optional:");
>  				if (optstart) {
>  					optstart += strlen("[Optional:");
>  					optend = strstr(optstart, "]");
> @@ -1471,6 +1471,7 @@ static int tlmi_analyze(void)
>  							kstrndup(optstart, optend - optstart,
>  									GFP_KERNEL);
>  				}
> +				kfree(optitem);
>  			}
>  		}
>  		/*
diff mbox series

Patch

diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index 6034df6d577d..87f832142d8d 100644
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -1459,10 +1459,10 @@  static int tlmi_analyze(void)
 			 * name string.
 			 * Try and pull that out if it's available.
 			 */
-			char *item, *optstart, *optend;
+			char *optitem, *optstart, *optend;
 
-			if (!tlmi_setting(setting->index, &item, LENOVO_BIOS_SETTING_GUID)) {
-				optstart = strstr(item, "[Optional:");
+			if (!tlmi_setting(setting->index, &optitem, LENOVO_BIOS_SETTING_GUID)) {
+				optstart = strstr(optitem, "[Optional:");
 				if (optstart) {
 					optstart += strlen("[Optional:");
 					optend = strstr(optstart, "]");
@@ -1471,6 +1471,7 @@  static int tlmi_analyze(void)
 							kstrndup(optstart, optend - optstart,
 									GFP_KERNEL);
 				}
+				kfree(optitem);
 			}
 		}
 		/*