This is a note to let you know that I've just added the patch titled
drm/ttm: Fix an invalid freeing on already freed page in error path
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-ttm-fix-an-invalid-freeing-on-already-freed-page-in-error-path.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.
>From 40510a941d27d405a82dc3320823d875f94625df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= <thomas.hellstrom@xxxxxxxxxxxxxxx>
Date: Wed, 21 Feb 2024 08:33:24 +0100
Subject: drm/ttm: Fix an invalid freeing on already freed page in error path
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From: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
commit 40510a941d27d405a82dc3320823d875f94625df upstream.
If caching mode change fails due to, for example, OOM we
free the allocated pages in a two-step process. First the pages
for which the caching change has already succeeded. Secondly
the pages for which a caching change did not succeed.
However the second step was incorrectly freeing the pages already
freed in the first step.
Fix.
Signed-off-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Fixes: 379989e7cbdc ("drm/ttm/pool: Fix ttm_pool_alloc error path")
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Cc: Huang Rui <ray.huang@xxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v6.4+
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240221073324.3303-1-thomas.hellstrom@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/ttm/ttm_pool.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/ttm/ttm_pool.c
+++ b/drivers/gpu/drm/ttm/ttm_pool.c
@@ -384,7 +384,7 @@ static void ttm_pool_free_range(struct t
enum ttm_caching caching,
pgoff_t start_page, pgoff_t end_page)
{
- struct page **pages = tt->pages;
+ struct page **pages = &tt->pages[start_page];
unsigned int order;
pgoff_t i, nr;
Patches currently in stable-queue which might be from thomas.hellstrom@xxxxxxxxxxxxxxx are
queue-5.15/drm-ttm-fix-an-invalid-freeing-on-already-freed-page-in-error-path.patch
