1 files changed, 120 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/dhcp/dhcp/CVE-2022-2928.patch b/meta/recipes-connectivity/dhcp/dhcp/CVE-2022-2928.patch
new file mode 100644
index 0000000000..11f162cbda
--- /dev/null
+++ b/meta/recipes-connectivity/dhcp/dhcp/CVE-2022-2928.patch
@@ -0,0 +1,120 @@
+From 8a5d739eea10ee6e193f053b1662142d5657cbc6 Mon Sep 17 00:00:00 2001
+From: Hitendra Prajapati <hprajapati@mvista.com>
+Date: Thu, 6 Oct 2022 09:39:18 +0530
+Subject: [PATCH] CVE-2022-2928
+
+Upstream-Status: Backport [https://downloads.isc.org/isc/dhcp/4.4.3-P1/patches/]
+CVE: CVE-2022-2928
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ common/options.c               |  7 +++++
+ common/tests/option_unittest.c | 54 ++++++++++++++++++++++++++++++++++
+ 2 files changed, 61 insertions(+)
+
+diff --git a/common/options.c b/common/options.c
+index a7ed84c..4e53bb4 100644
+--- a/common/options.c
++++ b/common/options.c
+@@ -4452,6 +4452,8 @@ add_option(struct option_state *options,
+        if (!option_cache_allocate(&oc, MDL)) {
+                log_error("No memory for option cache adding %s (option %d).",
+                          option->name, option_num);
++               /* Get rid of reference created during hash lookup. */
++               option_dereference(&option, MDL);
+                return 0;
+        }
+ 
+@@ -4463,6 +4465,8 @@ add_option(struct option_state *options,
+                             MDL)) {
+                log_error("No memory for constant data adding %s (option %d).",
+                          option->name, option_num);
++               /* Get rid of reference created during hash lookup. */
++               option_dereference(&option, MDL);
+                option_cache_dereference(&oc, MDL);
+                return 0;
+        }
+@@ -4471,6 +4475,9 @@ add_option(struct option_state *options,
+        save_option(&dhcp_universe, options, oc);
+        option_cache_dereference(&oc, MDL);
+ 
++       /* Get rid of reference created during hash lookup. */
++       option_dereference(&option, MDL);
++
+        return 1;
+ }
+ 
+diff --git a/common/tests/option_unittest.c b/common/tests/option_unittest.c
+index cd52cfb..690704d 100644
+--- a/common/tests/option_unittest.c
++++ b/common/tests/option_unittest.c
+@@ -130,6 +130,59 @@ ATF_TC_BODY(pretty_print_option, tc)
+ }
+ 
+ 
++ATF_TC(add_option_ref_cnt);
++
++ATF_TC_HEAD(add_option_ref_cnt, tc)
++{
++    atf_tc_set_md_var(tc, "descr",
++        "Verify add_option() does not leak option ref counts.");
++}
++
++ATF_TC_BODY(add_option_ref_cnt, tc)
++{
++    struct option_state *options = NULL;
++    struct option *option = NULL;
++    unsigned int cid_code = DHO_DHCP_CLIENT_IDENTIFIER;
++    char *cid_str = "1234";
++    int refcnt_before = 0;
++
++    // Look up the option we're going to add.
++    initialize_common_option_spaces();
++    if (!option_code_hash_lookup(&option, dhcp_universe.code_hash,
++                                 &cid_code, 0, MDL)) {
++        atf_tc_fail("cannot find option definition?");
++    }
++
++    // Get the option's reference count before we call add_options.
++    refcnt_before = option->refcnt;
++
++    // Allocate a option_state to which to add an option.
++    if (!option_state_allocate(&options, MDL)) {
++           atf_tc_fail("cannot allocat options state");
++    }
++
++    // Call add_option() to add the option to the option state.
++    if (!add_option(options, cid_code, cid_str, strlen(cid_str))) {
++           atf_tc_fail("add_option returned 0");
++    }
++
++    // Verify that calling add_option() only adds 1 to the option ref count.
++    if (option->refcnt != (refcnt_before + 1)) {
++        atf_tc_fail("after add_option(), count is wrong, before %d, after: %d",
++                    refcnt_before, option->refcnt);
++    }
++
++    // Derefrence the option_state, this should reduce the ref count to
++    // it's starting value.
++    option_state_dereference(&options, MDL);
++
++    // Verify that dereferencing option_state restores option ref count.
++    if (option->refcnt != refcnt_before) {
++        atf_tc_fail("after state deref, count is wrong, before %d, after: %d",
++                    refcnt_before, option->refcnt);
++    }
++}
++
+ /* This macro defines main() method that will call specified
+    test cases. tp and simple_test_case names can be whatever you want
+    as long as it is a valid variable identifier. */
+@@ -137,6 +190,7 @@ ATF_TP_ADD_TCS(tp)
+ {
+     ATF_TP_ADD_TC(tp, option_refcnt);
+     ATF_TP_ADD_TC(tp, pretty_print_option);
++    ATF_TP_ADD_TC(tp, add_option_ref_cnt);
+ 
+     return (atf_no_error());
+ }
+-- 
+2.25.1
+