This is a note to let you know that I've just added the patch titled
drm/panfrost: Fix the panfrost_mmu_map_fault_addr() error path
to the 5.4-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-panfrost-fix-the-panfrost_mmu_map_fault_addr-error-path.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 764a2ab9eb56e1200083e771aab16186836edf1d Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Date: Fri, 21 May 2021 11:38:11 +0200
Subject: drm/panfrost: Fix the panfrost_mmu_map_fault_addr() error path
From: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
commit 764a2ab9eb56e1200083e771aab16186836edf1d upstream.
Make sure all bo->base.pages entries are either NULL or pointing to a
valid page before calling drm_gem_shmem_put_pages().
Reported-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 187d2929206e ("drm/panfrost: Add support for GPU heap allocations")
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Reviewed-by: Steven Price <steven.price@xxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210521093811.1018992-1-boris.brezillon@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/panfrost/panfrost_mmu.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -502,6 +502,7 @@ static int panfrost_mmu_map_fault_addr(s
if (IS_ERR(pages[i])) {
mutex_unlock(&bo->base.pages_lock);
ret = PTR_ERR(pages[i]);
+ pages[i] = NULL;
goto err_pages;
}
}
Patches currently in stable-queue which might be from boris.brezillon@xxxxxxxxxxxxx are
queue-5.4/drm-panfrost-fix-the-panfrost_mmu_map_fault_addr-error-path.patch
