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Message-Id: <20220128192951.626532-1-lyude@redhat.com>
Date: Fri, 28 Jan 2022 14:29:50 -0500
From: Lyude Paul <lyude@...hat.com>
To: nouveau@...ts.freedesktop.org
Cc: dri-devel@...ts.freedesktop.org,
Greg KH <gregkh@...uxfoundation.org>,
Ben Skeggs <bskeggs@...hat.com>,
Karol Herbst <kherbst@...hat.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Zhou Qingyang <zhou1615@....edu>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] Revert "drm/nouveau/acr: Fix undefined behavior in nvkm_acr_hsfw_load_bl()"
This reverts commit 2343bcdb4747d4f418a4daf2e898b94f86c24a59.
Unfortunately, as Greg pointed out I totally missed the fact that this
patch came from a umn.edu patch. umn.edu is still banned from contributing
to the Linux kernel, so let's revert this for the time being. I'll
re-evaluate this fix myself later and send another fix if this ends up
being valid.
Signed-off-by: Lyude Paul <lyude@...hat.com>
Cc: Greg KH <gregkh@...uxfoundation.org>
Cc: Ben Skeggs <bskeggs@...hat.com>
Cc: Karol Herbst <kherbst@...hat.com>
---
drivers/gpu/drm/nouveau/nvkm/subdev/acr/hsfw.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/acr/hsfw.c b/drivers/gpu/drm/nouveau/nvkm/subdev/acr/hsfw.c
index a6ea89a5d51a..667fa016496e 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/acr/hsfw.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/acr/hsfw.c
@@ -142,12 +142,11 @@ nvkm_acr_hsfw_load_bl(struct nvkm_acr *acr, const char *name, int ver,
hsfw->imem_size = desc->code_size;
hsfw->imem_tag = desc->start_tag;
- hsfw->imem = kmemdup(data + desc->code_off, desc->code_size, GFP_KERNEL);
+ hsfw->imem = kmalloc(desc->code_size, GFP_KERNEL);
+ memcpy(hsfw->imem, data + desc->code_off, desc->code_size);
+
nvkm_firmware_put(fw);
- if (!hsfw->imem)
- return -ENOMEM;
- else
- return 0;
+ return 0;
}
int
--
2.34.1
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