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From: Tony Nguyen <anthony.l.nguyen@intel.com>
To: davem@davemloft.net, kuba@kernel.org
Cc: Kees Cook <keescook@chromium.org>,
	netdev@vger.kernel.org, anthony.l.nguyen@intel.com
Subject: [PATCH net-next 3/3] e100: Avoid memcpy() over-reading of ETH_SS_STATS
Date: Fri, 23 Jul 2021 10:09:10 -0700	[thread overview]
Message-ID: <20210723170910.296843-4-anthony.l.nguyen@intel.com> (raw)
In-Reply-To: <20210723170910.296843-1-anthony.l.nguyen@intel.com>

From: Kees Cook <keescook@chromium.org>

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy(), memmove(), and memset(), avoid
intentionally reading across neighboring array fields.

The memcpy() is copying the entire structure, not just the first array.
Adjust the source argument so the compiler can do appropriate bounds
checking.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/e100.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/e100.c b/drivers/net/ethernet/intel/e100.c
index 1b0958bd24f6..1ec924c556c5 100644
--- a/drivers/net/ethernet/intel/e100.c
+++ b/drivers/net/ethernet/intel/e100.c
@@ -2715,10 +2715,10 @@ static void e100_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 {
 	switch (stringset) {
 	case ETH_SS_TEST:
-		memcpy(data, *e100_gstrings_test, sizeof(e100_gstrings_test));
+		memcpy(data, e100_gstrings_test, sizeof(e100_gstrings_test));
 		break;
 	case ETH_SS_STATS:
-		memcpy(data, *e100_gstrings_stats, sizeof(e100_gstrings_stats));
+		memcpy(data, e100_gstrings_stats, sizeof(e100_gstrings_stats));
 		break;
 	}
 }
-- 
2.26.2


  parent reply	other threads:[~2021-07-23 17:06 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-23 17:09 [PATCH net-next 0/3][pull request] 1GbE Intel Wired LAN Driver Updates 2021-07-23 Tony Nguyen
2021-07-23 17:09 ` [PATCH net-next 1/3] igb: Add counter to i21x doublecheck Tony Nguyen
2021-07-23 17:09 ` [PATCH net-next 2/3] igb: Avoid memcpy() over-reading of ETH_SS_STATS Tony Nguyen
2021-07-23 17:09 ` Tony Nguyen [this message]
2021-07-23 20:30 ` [PATCH net-next 0/3][pull request] 1GbE Intel Wired LAN Driver Updates 2021-07-23 patchwork-bot+netdevbpf

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