This is a note to let you know that I've just added the patch titled
drm/ttm: Don't leak a resource on swapout move error
to the 6.4-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-don-t-leak-a-resource-on-swapout-move-error.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a590f03d8de7c4cb7ce4916dc7f2fd10711faabe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= <thomas.hellstrom@xxxxxxxxxxxxxxx>
Date: Mon, 26 Jun 2023 11:14:50 +0200
Subject: drm/ttm: Don't leak a resource on swapout move error
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From: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
commit a590f03d8de7c4cb7ce4916dc7f2fd10711faabe upstream.
If moving the bo to system for swapout failed, we were leaking
a resource. Fix.
Fixes: bfa3357ef9ab ("drm/ttm: allocate resource object instead of embedding it v2")
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: "Christian König" <ckoenig.leichtzumerken@xxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v5.14+
Signed-off-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Reviewed-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230626091450.14757-5-thomas.hellstrom@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/ttm/ttm_bo.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1167,6 +1167,7 @@ int ttm_bo_swapout(struct ttm_buffer_obj
ret = ttm_bo_handle_move_mem(bo, evict_mem, true, &ctx, &hop);
if (unlikely(ret != 0)) {
WARN(ret == -EMULTIHOP, "Unexpected multihop in swaput - likely driver bug.\n");
+ ttm_resource_free(bo, &evict_mem);
goto out;
}
}
Patches currently in stable-queue which might be from thomas.hellstrom@xxxxxxxxxxxxxxx are
queue-6.4/drm-ttm-don-t-leak-a-resource-on-swapout-move-error.patch
queue-6.4/drm-ttm-don-t-leak-a-resource-on-eviction-error.patch
