Patch "drm: Require __GFP_NOFAIL for the legacy drm_modeset_lock_all" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

drm: Require __GFP_NOFAIL for the legacy drm_modeset_lock_all

to the 4.14-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-require-__gfp_nofail-for-the-legacy-drm_modeset_lock_all.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Chris Wilson <[email protected]>
Date: Tue, 31 Oct 2017 11:55:35 +0000
Subject: drm: Require __GFP_NOFAIL for the legacy drm_modeset_lock_all
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From: Chris Wilson <[email protected]>

commit d18d1a5ac811d12f7ebc1129230312b5f2c50cb8 upstream.

To acquire all modeset locks requires a ww_ctx to be allocated. As this is the legacy path and the allocation small, to reduce the changes required (and complex untested error handling) to the legacy drivers, we simply assume that the allocation succeeds. At present, it relies on the too-small-to-fail rule, but syzbot found that by injecting a failure here we would hit the WARN. Document that this allocation must succeed with __GFP_NOFAIL.

---
 drivers/gpu/drm/drm_modeset_lock.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -88,7 +88,7 @@ void drm_modeset_lock_all(struct drm_dev
 	struct drm_modeset_acquire_ctx *ctx;
 	int ret;
 
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL | __GFP_NOFAIL);
 	if (WARN_ON(!ctx))
 		return;
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/drm-require-__gfp_nofail-for-the-legacy-drm_modeset_lock_all.patch