linux-kernel - [PATCH] drm/i915: Don't leak in i915_gem_shmem_pread

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Date:	Sun, 12 Jun 2011 21:53:44 +0100
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	linux-kernel@...r.kernel.org
Cc:	dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
	Jesper Juhl <jj@...osbits.net>,
	Chris Wilson <chris@...is-wilson.co.uk>
Subject: [PATCH] drm/i915: Don't leak in i915_gem_shmem_pread_slow()

From: Jesper Juhl <jj@...osbits.net>

It seems to me that we are leaking 'user_pages' in
drivers/gpu/drm/i915/i915_gem.c::i915_gem_shmem_pread_slow() if
read_cache_page_gfp() fails.

Signed-off-by: Jesper Juhl <jj@...osbits.net>
Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 12d3257..94c84d7 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -465,8 +465,10 @@ i915_gem_shmem_pread_slow(struct drm_device *dev,
 
 		page = read_cache_page_gfp(mapping, offset >> PAGE_SHIFT,
 					   GFP_HIGHUSER | __GFP_RECLAIMABLE);
-		if (IS_ERR(page))
-			return PTR_ERR(page);
+		if (IS_ERR(page)) {
+			ret = PTR_ERR(page);
+			goto out;
+		}
 
 		if (do_bit17_swizzling) {
 			slow_shmem_bit17_copy(page,
-- 
1.7.5.3

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