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From: Andy Green <andy@warmcat.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 06/18] drivers: net: nfp: nfpcore fix off-by-one and no NUL on strncpy use
Date: Tue, 08 May 2018 12:29:58 +0800
Message-ID: <152575379822.56689.11093033413803526492.stgit@localhost.localdomain> (raw)
In-Reply-To: <152575364588.56689.3300796065057551728.stgit@localhost.localdomain>

/home/agreen/projects/dpdk/drivers/net/nfp/nfpcore/nfp_resource.c:76:2: error: ‘strncpy’ output may be truncated copying 8 bytes from a string of length 8 [-Werror=stringop-truncation]
  strncpy(name_pad, res->name, sizeof(name_pad));
---
 drivers/net/nfp/nfpcore/nfp_resource.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/nfp/nfpcore/nfp_resource.c b/drivers/net/nfp/nfpcore/nfp_resource.c
index e1df2b2e1..54c6dcf54 100644
--- a/drivers/net/nfp/nfpcore/nfp_resource.c
+++ b/drivers/net/nfp/nfpcore/nfp_resource.c
@@ -65,15 +65,15 @@ struct nfp_resource {
 static int
 nfp_cpp_resource_find(struct nfp_cpp *cpp, struct nfp_resource *res)
 {
-	char name_pad[NFP_RESOURCE_ENTRY_NAME_SZ] = {};
+	char name_pad[NFP_RESOURCE_ENTRY_NAME_SZ + 2];
 	struct nfp_resource_entry entry;
 	uint32_t cpp_id, key;
 	int ret, i;
 
 	cpp_id = NFP_CPP_ID(NFP_RESOURCE_TBL_TARGET, 3, 0);  /* Atomic read */
 
-	memset(name_pad, 0, NFP_RESOURCE_ENTRY_NAME_SZ);
-	strncpy(name_pad, res->name, sizeof(name_pad));
+	memset(name_pad, 0, sizeof(name_pad));
+	strncpy(name_pad, res->name, sizeof(name_pad) - 1);
 
 	/* Search for a matching entry */
 	if (!memcmp(name_pad, NFP_RESOURCE_TBL_NAME "\0\0\0\0\0\0\0\0", 8)) {

  parent reply	other threads:[~2018-05-08  4:35 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-08  4:29 [dpdk-dev] [PATCH 00/18] Fix build on gcc8 and various bugs Andy Green
2018-05-08  4:29 ` [dpdk-dev] [PATCH 01/18] lib: ret_table: workaround hash function cast error Andy Green
2018-05-08  4:29 ` [dpdk-dev] [PATCH 02/18] drivers: bus: pci: fix strncpy dangerous code Andy Green
2018-05-08  8:57   ` Bruce Richardson
2018-05-08  4:29 ` [dpdk-dev] [PATCH 03/18] drivers: bus: dpaa: fix inconsistent struct alignment Andy Green
2018-05-08  4:29 ` [dpdk-dev] [PATCH 04/18] drivers: net: axgbe: fix broken eeprom string comp Andy Green
2018-05-08  4:29 ` [dpdk-dev] [PATCH 05/18] drivers: net: nfp: nfpcore: fix strncpy misuse Andy Green
2018-05-08  8:58   ` Bruce Richardson
2018-05-08  9:00     ` Andy Green
2018-05-08  9:03       ` Bruce Richardson
2018-05-08  4:29 ` Andy Green [this message]
2018-05-08  4:30 ` [dpdk-dev] [PATCH 07/18] drivers: net: nfp: don't memcpy out of source range Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 08/18] drivers: net: nfp: fix buffer overflow in fw_name Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 09/18] drivers: net: qede: fix strncpy constant and NUL Andy Green
2018-05-08 17:59   ` Shaikh, Shahed
2018-05-08 19:53     ` Bruce Richardson
2018-05-08 20:02       ` Shaikh, Shahed
2018-05-08 22:07         ` Andy Green
2018-05-08 23:33           ` Shaikh, Shahed
2018-05-08  4:30 ` [dpdk-dev] [PATCH 10/18] drivers: net: qede: fix broken strncpy Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 11/18] drivers:net:sfc: fix strncpy length Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 12/18] drivers: net: sfc: fix another strncpy size and NUL Andy Green
2018-05-08  7:36   ` Andrew Rybchenko
2018-05-08  8:18     ` Andy Green
2018-05-08  9:02       ` Bruce Richardson
2018-05-08  9:08       ` Andrew Rybchenko
2018-05-08  4:30 ` [dpdk-dev] [PATCH 13/18] drivers: net: vdev: readlink inputs cannot be aliased Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 14/18] drivers: net: vdev: fix 3 x strncpy misuse Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 15/18] test-pmd: can't find include Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 16/18] app: fix sprintf overrun bug Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 17/18] app: test-bbdev: strcpy ok for allocated string Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 18/18] app: test-bbdev: strcpy ok for allocated string 2 Andy Green

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