This is a note to let you know that I've just added the patch titled
drm/xe: fixup xe_alloc_pf_queue
to the 6.11-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-xe-fixup-xe_alloc_pf_queue.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 65431d901bd52b9ecfde78e4550047abb7e73699
Author: Matthew Auld <matthew.auld@xxxxxxxxx>
Date: Wed Aug 21 18:19:18 2024 +0100
drm/xe: fixup xe_alloc_pf_queue
[ Upstream commit 321d6b4b9cbe3dd0bc99937d5e5b4d730b5b5798 ]
kzalloc expects number of bytes, therefore we should convert the number
of dw into bytes, otherwise we are likely just accessing beyond the
array causing all kinds of carnage. Also fixup the error handling while
we are here.
v2:
- Prefer kcalloc (dim)
Fixes: 3338e4f90c14 ("drm/xe: Use topology to determine page fault queue size")
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Stuart Summers <stuart.summers@xxxxxxxxx>
Cc: Matthew Brost <matthew.brost@xxxxxxxxx>
Reviewed-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240821171917.417386-2-matthew.auld@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/xe/xe_gt_pagefault.c b/drivers/gpu/drm/xe/xe_gt_pagefault.c
index 401c0527d9140..0be4687bfc203 100644
--- a/drivers/gpu/drm/xe/xe_gt_pagefault.c
+++ b/drivers/gpu/drm/xe/xe_gt_pagefault.c
@@ -417,7 +417,10 @@ static int xe_alloc_pf_queue(struct xe_gt *gt, struct pf_queue *pf_queue)
(num_eus + XE_NUM_HW_ENGINES) * PF_MSG_LEN_DW;
pf_queue->gt = gt;
- pf_queue->data = kzalloc(pf_queue->num_dw, GFP_KERNEL);
+ pf_queue->data = kcalloc(pf_queue->num_dw, sizeof(u32), GFP_KERNEL);
+ if (!pf_queue->data)
+ return -ENOMEM;
+
spin_lock_init(&pf_queue->lock);
INIT_WORK(&pf_queue->worker, pf_queue_work_func);
