* [PATCH] HID: playstation: Fix memory leak in dualshock4_get_calibration_data()
@ 2025-11-10 17:15 Abdun Nihaal
2025-11-10 17:49 ` Markus Elfring
2025-11-18 17:07 ` Jiri Kosina
0 siblings, 2 replies; 4+ messages in thread
From: Abdun Nihaal @ 2025-11-10 17:15 UTC (permalink / raw)
To: roderick.colenbrander
Cc: Abdun Nihaal, jikos, bentiss, linux-input, linux-kernel
The memory allocated for buf is not freed in the error paths when
ps_get_report() fails. Free buf before jumping to transfer_failed label
Fixes: 947992c7fa9e ("HID: playstation: DS4: Fix calibration workaround for clone devices")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
---
Compile tested only. Found using static analysis.
drivers/hid/hid-playstation.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
index 63f6eb9030d1..128aa6abd10b 100644
--- a/drivers/hid/hid-playstation.c
+++ b/drivers/hid/hid-playstation.c
@@ -1942,6 +1942,7 @@ static int dualshock4_get_calibration_data(struct dualshock4 *ds4)
"Failed to retrieve DualShock4 calibration info: %d\n",
ret);
ret = -EILSEQ;
+ kfree(buf);
goto transfer_failed;
} else {
break;
@@ -1959,6 +1960,7 @@ static int dualshock4_get_calibration_data(struct dualshock4 *ds4)
if (ret) {
hid_warn(hdev, "Failed to retrieve DualShock4 calibration info: %d\n", ret);
+ kfree(buf);
goto transfer_failed;
}
}
--
2.43.0
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] HID: playstation: Fix memory leak in dualshock4_get_calibration_data()
2025-11-10 17:15 [PATCH] HID: playstation: Fix memory leak in dualshock4_get_calibration_data() Abdun Nihaal
@ 2025-11-10 17:49 ` Markus Elfring
2025-11-11 11:23 ` Abdun Nihaal
2025-11-18 17:07 ` Jiri Kosina
1 sibling, 1 reply; 4+ messages in thread
From: Markus Elfring @ 2025-11-10 17:49 UTC (permalink / raw)
To: Abdun Nihaal, linux-input, Roderick Colenbrander
Cc: LKML, Benjamin Tissoires, Jiri Kosina
> The memory allocated for buf is not freed in the error paths when
> ps_get_report() fails. Free buf before jumping to transfer_failed label
Would an additional label become helpful for this function implementation?
Regards,
Markus
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] HID: playstation: Fix memory leak in dualshock4_get_calibration_data()
2025-11-10 17:49 ` Markus Elfring
@ 2025-11-11 11:23 ` Abdun Nihaal
0 siblings, 0 replies; 4+ messages in thread
From: Abdun Nihaal @ 2025-11-11 11:23 UTC (permalink / raw)
To: Markus Elfring
Cc: linux-input, Roderick Colenbrander, LKML, Benjamin Tissoires,
Jiri Kosina
On Mon, Nov 10, 2025 at 06:49:01PM +0100, Markus Elfring wrote:
> > The memory allocated for buf is not freed in the error paths when
> > ps_get_report() fails. Free buf before jumping to transfer_failed label
>
> Would an additional label become helpful for this function implementation?
In the function, the code present at the transfer_failed label is shared
between normal and error paths, and is not the traditional error path label,
that's why I put the kfree for the two cases immediately before the goto.
Regards,
Nihaal
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] HID: playstation: Fix memory leak in dualshock4_get_calibration_data()
2025-11-10 17:15 [PATCH] HID: playstation: Fix memory leak in dualshock4_get_calibration_data() Abdun Nihaal
2025-11-10 17:49 ` Markus Elfring
@ 2025-11-18 17:07 ` Jiri Kosina
1 sibling, 0 replies; 4+ messages in thread
From: Jiri Kosina @ 2025-11-18 17:07 UTC (permalink / raw)
To: Abdun Nihaal; +Cc: roderick.colenbrander, bentiss, linux-input, linux-kernel
On Mon, 10 Nov 2025, Abdun Nihaal wrote:
> The memory allocated for buf is not freed in the error paths when
> ps_get_report() fails. Free buf before jumping to transfer_failed label
>
> Fixes: 947992c7fa9e ("HID: playstation: DS4: Fix calibration workaround for clone devices")
> Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Applied, thanks.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2025-11-18 17:07 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2025-11-10 17:15 [PATCH] HID: playstation: Fix memory leak in dualshock4_get_calibration_data() Abdun Nihaal
2025-11-10 17:49 ` Markus Elfring
2025-11-11 11:23 ` Abdun Nihaal
2025-11-18 17:07 ` Jiri Kosina
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