linux-kernel - lzo1x_decompress_safe: Macro compares unsigned to 0 (NO

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Message-ID: <53B11047.3000105@nod.at>
Date:	Mon, 30 Jun 2014 09:22:47 +0200
From:	Richard Weinberger <richard@....at>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	donb@...uritymouse.com, markus@...rhumer.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: lzo1x_decompress_safe: Macro compares unsigned to 0  (NO_EFFECT)

This was introduced by:
commit 206a81c18401c0cde6e579164f752c4b147324ce
Author: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Date:   Fri Jun 20 22:00:53 2014 -0700

    lzo: properly check for overruns

Thanks,
//richard

-------- Original-Nachricht --------
Betreff: New Defects reported by Coverity Scan for Linux
Datum: Sun, 29 Jun 2014 22:09:11 -0700
Von: scan-admin@...erity.com


Hi,


Please find the latest report on new defect(s) introduced to Linux found with Coverity Scan.

Defect(s) Reported-by: Coverity Scan
Showing 1 of 1 defect(s)


** CID 1224102:  Macro compares unsigned to 0  (NO_EFFECT)
/lib/lzo/lzo1x_decompress_safe.c: 225 in lzo1x_decompress_safe()


________________________________________________________________________________________________________
*** CID 1224102:  Macro compares unsigned to 0  (NO_EFFECT)
/lib/lzo/lzo1x_decompress_safe.c: 225 in lzo1x_decompress_safe()
219     			op += t;
220     			ip += t;
221     		} else
222     #endif
223     		{
224     			NEED_IP(t, 3);
>>>     CID 1224102:  Macro compares unsigned to 0  (NO_EFFECT)
>>>     This greater-than-or-equal-to-zero comparison of an unsigned value is always true. "t + 0UL >= 0UL".
225     			NEED_OP(t, 0);
226     			while (t > 0) {
227     				*op++ = *ip++;
228     				t--;
229     			}
230     		}


________________________________________________________________________________________________________
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