This is a note to let you know that I've just added the patch titled
drm/vmwgfx: Fix memory leak in vmw_mksstat_add_ioctl()
to the 5.19-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-vmwgfx-fix-memory-leak-in-vmw_mksstat_add_ioctl.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ea4d20f3af03326a348ef794a5bb3814f963971b
Author: Rafael Mendonca <rafaelmendsr@xxxxxxxxx>
Date: Fri Sep 16 17:47:51 2022 -0300
drm/vmwgfx: Fix memory leak in vmw_mksstat_add_ioctl()
[ Upstream commit a40c7f61d12fbd1e785e59140b9efd57127c0c33 ]
If the copy of the description string from userspace fails, then the page
for the instance descriptor doesn't get freed before returning -EFAULT,
which leads to a memleak.
Fixes: 7a7a933edd6c ("drm/vmwgfx: Introduce VMware mks-guest-stats")
Signed-off-by: Rafael Mendonca <rafaelmendsr@xxxxxxxxx>
Reviewed-by: Martin Krastev <krastevm@xxxxxxxxxx>
Signed-off-by: Zack Rusin <zackr@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220916204751.720716-1-rafaelmendsr@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
index 2aceac7856e2..089046fa21be 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
@@ -1076,6 +1076,7 @@ int vmw_mksstat_add_ioctl(struct drm_device *dev, void *data,
if (desc_len < 0) {
atomic_set(&dev_priv->mksstat_user_pids[slot], 0);
+ __free_page(page);
return -EFAULT;
}
