linux-kernel - [PATCH] reset: brcmstb: Fix resource checks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191101030616.27372-1-f.fainelli@gmail.com>
Date:   Thu, 31 Oct 2019 20:06:15 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-arm-kernel@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        bcm-kernel-feedback-list@...adcom.com (maintainer:BROADCOM BCM7XXX ARM
        ARCHITECTURE),
        linux-arm-kernel@...ts.infradead.org (moderated list:BROADCOM BCM7XXX
        ARM ARCHITECTURE), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] reset: brcmstb: Fix resource checks

The use of IS_ALIGNED() is incorrect, the typical resource we pass looks
like this: start: 0x8404318, size: 0x30. When using IS_ALIGNED() we will
get the following 0x8404318 & (0x18 - 1) = 0x10 which is definitively
not equal to 0.

Replace this with an appropriate check on the start address and the
resource size to be a multiple of SW_INIT_BANK_SIZE.

Fixes: 77750bc089e4 ("reset: Add Broadcom STB SW_INIT reset controller driver")
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/reset/reset-brcmstb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/reset/reset-brcmstb.c b/drivers/reset/reset-brcmstb.c
index a608f445dad6..21ca6fa51365 100644
--- a/drivers/reset/reset-brcmstb.c
+++ b/drivers/reset/reset-brcmstb.c
@@ -91,8 +91,8 @@ static int brcmstb_reset_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!IS_ALIGNED(res->start, SW_INIT_BANK_SIZE) ||
-	    !IS_ALIGNED(resource_size(res), SW_INIT_BANK_SIZE)) {
+	if ((res->start & SW_INIT_BANK_SIZE) != SW_INIT_BANK_SIZE ||
+	    resource_size(res) % SW_INIT_BANK_SIZE) {
 		dev_err(kdev, "incorrect register range\n");
 		return -EINVAL;
 	}
-- 
2.17.1