From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 69EA7200A6 for ; Fri, 21 Jul 2023 19:06:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E0943C433C8; Fri, 21 Jul 2023 19:06:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689966369; bh=QK5GDbPaSlsDZ1GpnEKuXg0mYlNg9LGnw3yOBR7Attw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V8t3g1dhF13KMWUIUtsu/uktZ9ssIxyah4+z/ZmQ/l6lkf5NdkRq1i0TpIvzwMKiI Aa2MMGIQ3j8ETweFZBZgIM5/67Iiv0cYCX+TSyNBCPqtMKWWC+2uyQ+4ik4nTpEsy0 Tg26lLZ2VzJNxU/vVJGlSgP/dj/i4WByBslA8A9w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Hans de Goede , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.15 291/532] media: atomisp: gmin_platform: fix out_len in gmin_get_config_dsm_var() Date: Fri, 21 Jul 2023 18:03:15 +0200 Message-ID: <20230721160630.191186588@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160614.695323302@linuxfoundation.org> References: <20230721160614.695323302@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Dan Carpenter [ Upstream commit 1657f2934daf89e8d9fa4b2697008909eb22c73e ] Ideally, strlen(cur->string.pointer) and strlen(out) would be the same. But this code is using strscpy() to avoid a potential buffer overflow. So in the same way we should take the strlen() of the smaller string to avoid a buffer overflow in the caller, gmin_get_var_int(). Link: https://lore.kernel.org/r/26124bcd-8132-4483-9d67-225c87d424e8@kili.mountain Fixes: 387041cda44e ("media: atomisp: improve sensor detection code to use _DSM table") Signed-off-by: Dan Carpenter Signed-off-by: Hans de Goede Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c index cd0a771454da4..2a8ef766b25a4 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c +++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c @@ -1198,7 +1198,7 @@ static int gmin_get_config_dsm_var(struct device *dev, dev_info(dev, "found _DSM entry for '%s': %s\n", var, cur->string.pointer); strscpy(out, cur->string.pointer, *out_len); - *out_len = strlen(cur->string.pointer); + *out_len = strlen(out); ACPI_FREE(obj); return 0; -- 2.39.2