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From 2a352d36e2ecc3df4b1c2155b3fd2fa11f95e0bc Mon Sep 17 00:00:00 2001
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From: klebertarcisio <klebertarcisio@yahoo.com.br>
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Date: Fri, 2 Apr 2021 19:54:03 -0300
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Subject: [PATCH 7/8] Avoiding null pointer dereference
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---
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ctrl_iface.c | 2 ++
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dcbtool_cmds.c | 2 ++
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lldp_8021qaz.c | 4 ++++
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lldp_dcbx.c | 4 ++++
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4 files changed, 12 insertions(+)
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diff --git a/ctrl_iface.c b/ctrl_iface.c
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index 666f7c8..5f86fd2 100644
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--- a/ctrl_iface.c
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+++ b/ctrl_iface.c
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@@ -180,6 +180,8 @@ int clif_iface_attach(struct clif_data *clifd,
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} else {
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tlv = strdup(ibuf);
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str = tlv;
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+ if (!str)
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+ goto err_tlv;
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str++;
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/* Count number of TLV Modules */
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tokenize = strtok(str, delim);
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diff --git a/dcbtool_cmds.c b/dcbtool_cmds.c
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index 0846f83..e1c76c4 100644
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--- a/dcbtool_cmds.c
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+++ b/dcbtool_cmds.c
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@@ -373,6 +373,8 @@ int handle_dcb_cmds(struct clif *clif, int argc, char *argv[], int raw)
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}
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cmd_args = get_cmd_args();
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+ if (!cmd_args)
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+ return -1;
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if (get_feature() == FEATURE_DCBX)
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snprintf(cbuf, sizeof(cbuf), "%c%01x%02x%02x%s",
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diff --git a/lldp_8021qaz.c b/lldp_8021qaz.c
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index 8bb2bc9..5fccbe4 100644
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--- a/lldp_8021qaz.c
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+++ b/lldp_8021qaz.c
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@@ -1959,6 +1959,10 @@ int ieee8021qaz_rchange(struct port *port, struct lldp_agent *agent,
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if (tlv->type == TYPE_1) {
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clear_ieee8021qaz_rx(qaz_tlvs);
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rx = malloc(sizeof(*rx));
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+ if (!rx) {
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+ LLDPAD_INFO("failed malloc for rx\n");
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+ return TLV_ERR;
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+ }
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memset(rx, 0, sizeof(*rx));
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qaz_tlvs->rx = rx;
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qaz_tlvs->ieee8021qazdu = 0;
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diff --git a/lldp_dcbx.c b/lldp_dcbx.c
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index 3567634..66df857 100644
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--- a/lldp_dcbx.c
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+++ b/lldp_dcbx.c
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@@ -695,6 +695,10 @@ int dcbx_rchange(struct port *port, struct lldp_agent *agent, struct unpacked_tl
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*/
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if (tlv->type == TYPE_1) {
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manifest = malloc(sizeof(*manifest));
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+ if (!manifest) {
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+ LLDPAD_INFO("failed malloc for manifest\n");
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+ return TLV_ERR;
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+ }
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memset(manifest, 0, sizeof(*manifest));
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dcbx->manifest = manifest;
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dcbx->dcbdu = 0;
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--
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2.31.1
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