From: Steve Yang <stevex.yang@intel.com>
To: dev@dpdk.org
Cc: jingjing.wu@intel.com, beilei.xing@intel.com,
Steve Yang <stevex.yang@intel.com>
Subject: [PATCH v1] net/iavf: fix taninted scalar
Date: Thu, 10 Nov 2022 07:25:29 +0000 [thread overview]
Message-ID: <20221110072529.132523-1-stevex.yang@intel.com> (raw)
tainted_data_downcast: Downcasting match_item->meta from void * to
struct virtchnl_proto_hdrs implies that the data that this pointer points
to is tainted.
var_assign_var: Assigning: proto_hdrs = match_item->meta.
Both are now tainted.
var_assign_var: Assigning: rss_meta->proto_hdrs = *proto_hdrs. Both are
now tainted.
Passing tainted expression "rss_meta->proto_hdrs.count" to
"iavf_refine_proto_hdrs", wich uses it as a loop boundary.
Removed temporary variable 'proto_hdrs', and copied whole memory of
match_item meta with exact structure size to avoid data downcast.
Coverity issue: 381131
Fixes: 91f27b2e39ab ("net/iavf: refactor RSS")
Signed-off-by: Steve Yang <stevex.yang@intel.com>
---
drivers/net/iavf/iavf_hash.c | 22 +++++++++-------------
1 file changed, 9 insertions(+), 13 deletions(-)
diff --git a/drivers/net/iavf/iavf_hash.c b/drivers/net/iavf/iavf_hash.c
index 67b05313eb..ae6fb38594 100644
--- a/drivers/net/iavf/iavf_hash.c
+++ b/drivers/net/iavf/iavf_hash.c
@@ -992,10 +992,9 @@ iavf_refine_proto_hdrs_l234(struct virtchnl_proto_hdrs *proto_hdrs,
uint64_t rss_type)
{
struct virtchnl_proto_hdr *hdr;
- int phdrs_count = proto_hdrs->count;
int i;
- for (i = 0; i < phdrs_count; i++) {
+ for (i = 0; i < proto_hdrs->count; i++) {
hdr = &proto_hdrs->proto_hdr[i];
switch (hdr->type) {
case VIRTCHNL_PROTO_HDR_ETH:
@@ -1184,13 +1183,12 @@ iavf_refine_proto_hdrs_gtpu(struct virtchnl_proto_hdrs *proto_hdrs,
uint64_t rss_type)
{
struct virtchnl_proto_hdr *hdr;
- int phdrs_count = proto_hdrs->count;
int i;
if (!(rss_type & RTE_ETH_RSS_GTPU))
return;
- for (i = 0; i < phdrs_count; i++) {
+ for (i = 0; i < proto_hdrs->count; i++) {
hdr = &proto_hdrs->proto_hdr[i];
switch (hdr->type) {
case VIRTCHNL_PROTO_HDR_GTPU_IP:
@@ -1210,7 +1208,6 @@ iavf_refine_proto_hdrs_by_pattern(struct virtchnl_proto_hdrs *proto_hdrs,
struct virtchnl_proto_hdr *hdr2;
int i, shift_count = 1;
int tun_lvl = proto_hdrs->tunnel_level;
- int phdrs_count = 0;
if (!(phint & IAVF_PHINT_GTPU_MSK) && !(phint & IAVF_PHINT_GRE))
return;
@@ -1219,9 +1216,8 @@ iavf_refine_proto_hdrs_by_pattern(struct virtchnl_proto_hdrs *proto_hdrs,
if (phint & IAVF_PHINT_LAYERS_MSK)
shift_count = 2;
- phdrs_count = proto_hdrs->count;
/* shift headers layer */
- for (i = phdrs_count - 1 + shift_count;
+ for (i = proto_hdrs->count - 1 + shift_count;
i > shift_count - 1; i--) {
hdr1 = &proto_hdrs->proto_hdr[i];
hdr2 = &proto_hdrs->proto_hdr[i - shift_count];
@@ -1282,7 +1278,6 @@ iavf_refine_proto_hdrs_l2tpv2(struct virtchnl_proto_hdrs *proto_hdrs,
uint64_t phint)
{
struct virtchnl_proto_hdr *hdr, *hdr1;
- int phdrs_count = proto_hdrs->count;
int i;
if (!(phint & IAVF_PHINT_L2TPV2) && !(phint & IAVF_PHINT_L2TPV2_LEN))
@@ -1290,7 +1285,7 @@ iavf_refine_proto_hdrs_l2tpv2(struct virtchnl_proto_hdrs *proto_hdrs,
if (proto_hdrs->tunnel_level == TUNNEL_LEVEL_INNER) {
/* shift headers layer */
- for (i = phdrs_count; i > 0; i--)
+ for (i = proto_hdrs->count; i > 0; i--)
proto_hdrs->proto_hdr[i] = proto_hdrs->proto_hdr[i - 1];
/* adding outer ip header at layer 0 */
@@ -1303,7 +1298,7 @@ iavf_refine_proto_hdrs_l2tpv2(struct virtchnl_proto_hdrs *proto_hdrs,
else if (phint & IAVF_PHINT_OUTER_IPV6)
VIRTCHNL_SET_PROTO_HDR_TYPE(hdr1, IPV6);
} else {
- for (i = 0; i < phdrs_count; i++) {
+ for (i = 0; i < proto_hdrs->count; i++) {
hdr = &proto_hdrs->proto_hdr[i];
if (hdr->type == VIRTCHNL_PROTO_HDR_L2TPV2) {
if (phint & IAVF_PHINT_L2TPV2) {
@@ -1427,7 +1422,6 @@ iavf_hash_parse_action(struct iavf_pattern_match_item *match_item,
uint64_t pattern_hint, struct iavf_rss_meta *rss_meta,
struct rte_flow_error *error)
{
- struct virtchnl_proto_hdrs *proto_hdrs;
enum rte_flow_action_type action_type;
const struct rte_flow_action_rss *rss;
const struct rte_flow_action *action;
@@ -1488,8 +1482,10 @@ iavf_hash_parse_action(struct iavf_pattern_match_item *match_item,
return rte_flow_error_set(error, ENOTSUP,
RTE_FLOW_ERROR_TYPE_ACTION,
action, "RSS type not supported");
- proto_hdrs = match_item->meta;
- rss_meta->proto_hdrs = *proto_hdrs;
+
+ memcpy(&rss_meta->proto_hdrs, match_item->meta,
+ sizeof(struct virtchnl_proto_hdrs));
+
iavf_refine_proto_hdrs(&rss_meta->proto_hdrs,
rss_type, pattern_hint);
break;
--
2.25.1
next reply other threads:[~2022-11-10 7:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-10 7:25 Steve Yang [this message]
2022-11-10 8:30 ` [PATCH v2] " Steve Yang
2022-11-10 10:01 ` Zhang, Qi Z
-- strict thread matches above, loose matches on Subject: below --
2022-10-11 8:34 [PATCH v1] " Steve Yang
2022-10-13 3:23 ` Zhang, Qi Z
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20221110072529.132523-1-stevex.yang@intel.com \
--to=stevex.yang@intel.com \
--cc=beilei.xing@intel.com \
--cc=dev@dpdk.org \
--cc=jingjing.wu@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).