This is a note to let you know that I've just added the patch titled
drm/qxl: use kmalloc_array to alloc reloc_info in qxl_process_single_command
to the 4.4-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-qxl-use-kmalloc_array-to-alloc-reloc_info-in-qxl_process_single_command.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 34855706c30d52b0a744da44348b5d1cc39fbe51 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Date: Tue, 16 Feb 2016 14:25:00 +0100
Subject: drm/qxl: use kmalloc_array to alloc reloc_info in qxl_process_single_command
From: Gerd Hoffmann <kraxel@xxxxxxxxxx>
commit 34855706c30d52b0a744da44348b5d1cc39fbe51 upstream.
This avoids integer overflows on 32bit machines when calculating
reloc_info size, as reported by Alan Cox.
Cc: gnomes@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/qxl/qxl_ioctl.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/qxl/qxl_ioctl.c
+++ b/drivers/gpu/drm/qxl/qxl_ioctl.c
@@ -168,7 +168,8 @@ static int qxl_process_single_command(st
cmd->command_size))
return -EFAULT;
- reloc_info = kmalloc(sizeof(struct qxl_reloc_info) * cmd->relocs_num, GFP_KERNEL);
+ reloc_info = kmalloc_array(cmd->relocs_num,
+ sizeof(struct qxl_reloc_info), GFP_KERNEL);
if (!reloc_info)
return -ENOMEM;
Patches currently in stable-queue which might be from kraxel@xxxxxxxxxx are
queue-4.4/drm-qxl-use-kmalloc_array-to-alloc-reloc_info-in-qxl_process_single_command.patch
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