This is a note to let you know that I've just added the patch titled
iommu/mediatek: Fix forever loop in error handling
to the 6.0-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:
iommu-mediatek-fix-forever-loop-in-error-handling.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 936cfd0d5dcf6eafd5741c8b399607e6fac379ff
Author: Dan Carpenter <error27@xxxxxxxxx>
Date: Wed Dec 7 18:56:09 2022 +0300
iommu/mediatek: Fix forever loop in error handling
[ Upstream commit 462e768b55a2331324ff72e74706261134369826 ]
There is a typo so this loop does i++ where i-- was intended. It will
result in looping until the kernel crashes.
Fixes: 26593928564c ("iommu/mediatek: Add error path for loop of mm_dts_parse")
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
Reviewed-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/Y5C3mTam2nkbaz6o@kili
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 213fc8f5b6c1..ec73720e239b 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1127,8 +1127,7 @@ static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **m
return 0;
err_larbdev_put:
- /* id may be not linear mapping, loop whole the array */
- for (i = MTK_LARB_NR_MAX - 1; i >= 0; i++) {
+ for (i = MTK_LARB_NR_MAX - 1; i >= 0; i--) {
if (!data->larb_imu[i].dev)
continue;
put_device(data->larb_imu[i].dev);
