This is a note to let you know that I've just added the patch titled
media: imx-jpeg: Fix potential error pointer dereference in detach_pm()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-imx-jpeg-fix-potential-error-pointer-dereferen.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a5f47e93868304bebbe4674c7b33add465816872
Author: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Thu Oct 17 23:34:16 2024 +0300
media: imx-jpeg: Fix potential error pointer dereference in detach_pm()
[ Upstream commit 1378ffec30367233152b7dbf4fa6a25ee98585d1 ]
The proble is on the first line:
if (jpeg->pd_dev[i] && !pm_runtime_suspended(jpeg->pd_dev[i]))
If jpeg->pd_dev[i] is an error pointer, then passing it to
pm_runtime_suspended() will lead to an Oops. The other conditions
check for both error pointers and NULL, but it would be more clear to
use the IS_ERR_OR_NULL() check for that.
Fixes: fd0af4cd35da ("media: imx-jpeg: Ensure power suppliers be suspended before detach them")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Ming Qian <ming.qian@xxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/imx-jpeg/mxc-jpeg.c
index 8ac844db0e833..059e45aa03b7f 100644
--- a/drivers/media/platform/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.c
@@ -1997,11 +1997,12 @@ static void mxc_jpeg_detach_pm_domains(struct mxc_jpeg_dev *jpeg)
int i;
for (i = 0; i < jpeg->num_domains; i++) {
- if (jpeg->pd_dev[i] && !pm_runtime_suspended(jpeg->pd_dev[i]))
+ if (!IS_ERR_OR_NULL(jpeg->pd_dev[i]) &&
+ !pm_runtime_suspended(jpeg->pd_dev[i]))
pm_runtime_force_suspend(jpeg->pd_dev[i]);
- if (jpeg->pd_link[i] && !IS_ERR(jpeg->pd_link[i]))
+ if (!IS_ERR_OR_NULL(jpeg->pd_link[i]))
device_link_del(jpeg->pd_link[i]);
- if (jpeg->pd_dev[i] && !IS_ERR(jpeg->pd_dev[i]))
+ if (!IS_ERR_OR_NULL(jpeg->pd_dev[i]))
dev_pm_domain_detach(jpeg->pd_dev[i], true);
jpeg->pd_dev[i] = NULL;
jpeg->pd_link[i] = NULL;
