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HID: multitouch: Add NULL check in mt_input_configured 

[ Upstream commit 9b8e2220d3a052a690b1d1b23019673e612494c5 ]

devm_kasprintf() can return a NULL pointer on failure,but this
returned value in mt_input_configured() is not checked.
Add NULL check in mt_input_configured(), to handle kernel NULL
pointer dereference error.

Fixes: 4794394635 ("HID: multitouch: Correct devm device reference for hidinput input_dev name")
Signed-off-by: Charles Han <hanchunchao@inspur.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Charles Han 2024-11-15 14:26:21 +08:00 committed by Greg Kroah-Hartman
parent c5d46ae55a
commit 62f8bf0626
1 changed files with 4 additions and 1 deletions
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5
drivers/hid/hid-multitouch.c
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@ -1668,9 +1668,12 @@ static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
break;
}
if (suffix)
if (suffix) {
hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
"%s %s", hdev->name, suffix);
if (!hi->input->name)
return -ENOMEM;
}
return 0;
}