linux-hardening - Coverity: vgxy61_tx_from_ep(): Memory

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Date:   Thu, 10 Nov 2022 08:27:39 -0800
From:   coverity-bot <keescook@...omium.org>
To:     Benjamin Mugnier <benjamin.mugnier@...s.st.com>
Cc:     linux-kernel@...r.kernel.org,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Jean-Michel Hautbois <jeanmichel.hautbois@...asonboard.com>,
        Shawn Tu <shawnx.tu@...el.com>, linux-media@...r.kernel.org,
        Sylvain Petinot <sylvain.petinot@...s.st.com>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        linux-next@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Coverity: vgxy61_tx_from_ep(): Memory - corruptions

Hello!

This is an experimental semi-automated report about issues detected by
Coverity from a scan of next-20221110 as part of the linux-next scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by commits:

  Thu Oct 27 14:37:38 2022 +0300
    153e4ad44d60 ("media: i2c: Add driver for ST VGXY61 camera sensor")

Coverity reported the following:

*** CID 1527258:  Memory - corruptions  (OVERRUN)
drivers/media/i2c/st-vgxy61.c:1528 in vgxy61_tx_from_ep()
1522     	 * valid for hardware stuff.
1523     	 */
1524     	for (p = 0; p < VGXY61_NB_POLARITIES; p++) {
1525     		if (phy2log[p] != ~0)
1526     			continue;
1527     		phy2log[p] = l;
vvv     CID 1527258:  Memory - corruptions  (OVERRUN)
vvv     Overrunning array "log2phy" of 5 4-byte elements at element index 5 (byte offset 23) using index "l" (which evaluates to 5).
1528     		log2phy[l] = p;
1529     		l++;
1530     	}
1531     	for (l = 0; l < l_nb + 1; l++)
1532     		polarities[l] = ep.bus.mipi_csi2.lane_polarities[l];
1533

If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):

Reported-by: coverity-bot <keescook+coverity-bot@...omium.org>
Addresses-Coverity-ID: 1527258 ("Memory - corruptions")
Fixes: 153e4ad44d60 ("media: i2c: Add driver for ST VGXY61 camera sensor")

Note that l starts at 1, 2, or 4, so line 1529 could push it to 5, which
is out of bounds, etc...

Thanks for your attention!

-- 
Coverity-bot