This is a note to let you know that I've just added the patch titled
drm/mediatek: Fix potential memory leak if vmap() fail
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:
drm-mediatek-fix-potential-memory-leak-if-vmap-fail.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 8de66fea3a4fec730b1ca5dd1966cf391e8b45a5
Author: Sui Jingfeng <suijingfeng@xxxxxxxxxxx>
Date: Thu Jul 6 21:40:00 2023 +0800
drm/mediatek: Fix potential memory leak if vmap() fail
[ Upstream commit 379091e0f6d179d1a084c65de90fa44583b14a70 ]
Also return -ENOMEM if such a failure happens, the implement should take
responsibility for the error handling.
Fixes: 3df64d7b0a4f ("drm/mediatek: Implement gem prime vmap/vunmap function")
Reviewed-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Reviewed-by: Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
Signed-off-by: Sui Jingfeng <suijingfeng@xxxxxxxxxxx>
Reviewed-by: CK Hu <ck.hu@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20230706134000.130098-1-suijingfeng@xxxxxxxxxxx/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
index 726a34c4725c4..b983adffa3929 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
@@ -242,7 +242,11 @@ int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
mtk_gem->kvaddr = vmap(mtk_gem->pages, npages, VM_MAP,
pgprot_writecombine(PAGE_KERNEL));
-
+ if (!mtk_gem->kvaddr) {
+ kfree(sgt);
+ kfree(mtk_gem->pages);
+ return -ENOMEM;
+ }
out:
kfree(sgt);
dma_buf_map_set_vaddr(map, mtk_gem->kvaddr);
