linux-kernel - [PATCH] watchdog/hpwdt: Disable PreTimeout when Timeout is smaller

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 for Android: free password hash cracker in your pocket

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

Date:   Fri, 21 Sep 2018 14:50:39 -0600
From:   Jerry Hoemann <jerry.hoemann@....com>
To:     wim@...ux-watchdog.org, linux@...ck-us.net
Cc:     linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jerry Hoemann <jerry.hoemann@....com>
Subject: [PATCH] watchdog/hpwdt: Disable PreTimeout when Timeout is smaller

During module install, disable pretimeout if the requested timeout
value is not greater than the minimal pretimeout value that is
supported by hardware.

This makes the module load handling of pretimeout consistent
with the ioctl handling of pretimeout.

Signed-off-by: Jerry Hoemann <jerry.hoemann@....com>
---
 drivers/watchdog/hpwdt.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 7af358b3e278..93562304f7aa 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -311,6 +311,10 @@ static int hpwdt_init_one(struct pci_dev *dev,
 	if (watchdog_init_timeout(&hpwdt_dev, soft_margin, NULL))
 		dev_warn(&dev->dev, "Invalid soft_margin: %d.\n", soft_margin);
 
+	if (pretimeout && hpwdt_dev.timeout <= PRETIMEOUT_SEC) {
+		dev_warn(&dev->dev, "timeout <= pretimeout. Setting pretimeout to zero\n");
+		pretimeout = 0;
+	}
 	hpwdt_dev.pretimeout = pretimeout ? PRETIMEOUT_SEC : 0;
 
 	hpwdt_dev.parent = &dev->dev;
-- 
2.13.6