linux-kernel - Re: [PATCH] drivers: net: wimax: i2400m: i2400m-usb: Use time

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

Date:   Mon, 08 May 2017 17:26:18 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     karim.eshapa@...il.com
Cc:     inaky.perez-gonzalez@...el.com, linux-wimax@...el.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: net: wimax: i2400m: i2400m-usb: Use
 time_after for time comparison

From: Karim Eshapa <karim.eshapa@...il.com>
Date: Mon,  8 May 2017 18:58:02 +0200

> diff --git a/drivers/net/wimax/i2400m/i2400m-usb.h b/drivers/net/wimax/i2400m/i2400m-usb.h
> index 649ecad..6fc941c 100644
> --- a/drivers/net/wimax/i2400m/i2400m-usb.h
> +++ b/drivers/net/wimax/i2400m/i2400m-usb.h
> @@ -131,7 +131,7 @@ static inline int edc_inc(struct edc *edc, u16 max_err, u16 timeframe)
>  	unsigned long now;
>  
>  	now = jiffies;
> -	if (now - edc->timestart > timeframe) {
> +	if (time_after(now - edc->timestart, (unsigned long)timeframe)) {

This is far from correct.

time_after() compares two "jiffies" timestamp values.  The second
argument here is not a jiffies timestamp value.