diff mbox

ACPI / resources: fix memory leak on request_range fail path

Message ID 1435609020-18695-1-git-send-email-colin.king@canonical.com (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Colin King June 29, 2015, 8:17 p.m. UTC
From: Colin Ian King <colin.king@canonical.com>

static analysis from cppcheck detected a memory leak:
  [drivers/acpi/resource.c:664]: (error) Memory leak: reg

the error path on a failed request_range call should free
reg before returning. Bug introduced in the recent commit
0f1b414d190724617eb1cdd615592fa8cd9d0b50
("ACPI / PNP: Avoid conflicting resource reservations")

Fixes: 0f1b414d19 ("ACPI / PNP: Avoid conflicting resource reservations")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/acpi/resource.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Rafael J. Wysocki June 30, 2015, 3:09 p.m. UTC | #1
On Monday, June 29, 2015 09:17:00 PM Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> static analysis from cppcheck detected a memory leak:
>   [drivers/acpi/resource.c:664]: (error) Memory leak: reg
> 
> the error path on a failed request_range call should free
> reg before returning. Bug introduced in the recent commit
> 0f1b414d190724617eb1cdd615592fa8cd9d0b50
> ("ACPI / PNP: Avoid conflicting resource reservations")
> 
> Fixes: 0f1b414d19 ("ACPI / PNP: Avoid conflicting resource reservations")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

I have this fix queued up already as:

http://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git/commit/?h=linux-next&id=7bc10388ccdd79b3d20463151a1f8e7a590a775b

> ---
>  drivers/acpi/resource.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
> index fcb7807..10561ce 100644
> --- a/drivers/acpi/resource.c
> +++ b/drivers/acpi/resource.c
> @@ -660,8 +660,10 @@ static int add_region_before(u64 start, u64 end, u8 space_id,
>  		return -ENOMEM;
>  
>  	error = request_range(start, end, space_id, flags, desc);
> -	if (error)
> +	if (error) {
> +		kfree(reg);
>  		return error;
> +	}
>  
>  	reg->start = start;
>  	reg->end = end;
>
diff mbox

Patch

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index fcb7807..10561ce 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -660,8 +660,10 @@  static int add_region_before(u64 start, u64 end, u8 space_id,
 		return -ENOMEM;
 
 	error = request_range(start, end, space_id, flags, desc);
-	if (error)
+	if (error) {
+		kfree(reg);
 		return error;
+	}
 
 	reg->start = start;
 	reg->end = end;