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From: John Levon <levon@movementarian.org>
To: smatch@vger.kernel.org
Subject: Odd smatch issue?
Date: Fri, 11 Jan 2019 12:32:41 +0000	[thread overview]
Message-ID: <20190111123241.GA11408@movementarian.org> (raw)



static long
lx_cap_update_priv(void)
{
        const int lx_cap_mapping[4] = { 0, 0, 0 };
        int i = 63;
        /* enabling the below line disables the warning */
        //int cap_set = i == 0;
        lx_cap_mapping[i];
}


/home/gk/src/smatch/smatch: a.c:8 lx_cap_update_priv() error: buffer overflow 'lx_cap_mapping' 4 <= 63

Distilled down from some real code, obviously, but it seems odd that
just *looking* at "i" means smatch can't figure out its max value?

thanks
john

             reply	other threads:[~2019-01-11 12:51 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-11 12:32 John Levon [this message]
2019-01-14 10:18 ` Odd smatch issue? Dan Carpenter
2019-01-14 12:42   ` John Levon
2019-01-14 14:38     ` Dan Carpenter
2019-01-14 14:47       ` John Levon
2019-01-14 14:51         ` Dan Carpenter

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