procps: backport fix for CVE-2023-4016

(From OE-Core rev: 255515e1b52fea6d72d37fae61667db08eb5b086)

(From OE-Core rev: eae2a94f5de78b95590ec45e11e930655dbd5caf)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 74 insertions, 0 deletions

diff --git a/meta/recipes-extended/procps/procps/CVE-2023-4016.patch b/meta/recipes-extended/procps/procps/CVE-2023-4016.patch
new file mode 100644
index 0000000000..202fea91f1
--- /dev/null
+++ b/meta/recipes-extended/procps/procps/CVE-2023-4016.patch
@@ -0,0 +1,73 @@
+From 2c933ecba3bb1d3041a5a7a53a7b4078a6003413 Mon Sep 17 00:00:00 2001
+From: Craig Small <csmall@dropbear.xyz>
+Date: Thu, 10 Aug 2023 21:18:38 +1000
+Subject: [PATCH] ps: Fix possible buffer overflow in -C option
+
+ps allocates memory using malloc(length of arg * len of struct).
+In certain strange circumstances, the arg length could be very large
+and the multiplecation will overflow, allocating a small amount of
+memory.
+
+Subsequent strncpy() will then write into unallocated memory.
+The fix is to use calloc. It's slower but this is a one-time
+allocation. Other malloc(x * y) calls have also been replaced
+by calloc(x, y)
+
+References:
+ https://www.freelists.org/post/procps/ps-buffer-overflow-CVE-20234016
+ https://nvd.nist.gov/vuln/detail/CVE-2023-4016
+ https://gitlab.com/procps-ng/procps/-/issues/297
+ https://bugs.debian.org/1042887
+
+Signed-off-by: Craig Small <csmall@dropbear.xyz>
+
+CVE: CVE-2023-4016
+Upstream-Status: Backport [https://gitlab.com/procps-ng/procps/-/commit/2c933ecba3bb1d3041a5a7a53a7b4078a6003413]
+Signed-off-by: Ross Burton <ross.burton@arm.com>
+---
+ NEWS            | 1 +
+ src/ps/parser.c | 8 ++++----
+ 2 files changed, 5 insertions(+), 4 deletions(-)
+
+diff --git a/src/ps/parser.c b/src/ps/parser.c
+index 248aa741..15873dfa 100644
+--- a/src/ps/parser.c
++++ b/src/ps/parser.c
+@@ -189,7 +189,6 @@ static const char *parse_list(const char *arg, const char *(*parse_fn)(char *, s
+   const char *err;       /* error code that could or did happen */
+   /*** prepare to operate ***/
+   node = xmalloc(sizeof(selection_node));
+-  node->u = xmalloc(strlen(arg)*sizeof(sel_union)); /* waste is insignificant */
+   node->n = 0;
+   buf = strdup(arg);
+   /*** sanity check and count items ***/
+@@ -210,6 +209,7 @@ static const char *parse_list(const char *arg, const char *(*parse_fn)(char *, s
+   } while (*++walk);
+   if(need_item) goto parse_error;
+   node->n = items;
++  node->u = xcalloc(items, sizeof(sel_union));
+   /*** actually parse the list ***/
+   walk = buf;
+   while(items--){
+@@ -1050,15 +1050,15 @@ static const char *parse_trailing_pids(void){
+   thisarg = ps_argc - 1;   /* we must be at the end now */
+ 
+   pidnode = xmalloc(sizeof(selection_node));
+-  pidnode->u = xmalloc(i*sizeof(sel_union)); /* waste is insignificant */
++  pidnode->u = xcalloc(i, sizeof(sel_union)); /* waste is insignificant */
+   pidnode->n = 0;
+ 
+   grpnode = xmalloc(sizeof(selection_node));
+-  grpnode->u = xmalloc(i*sizeof(sel_union)); /* waste is insignificant */
++  grpnode->u = xcalloc(i,sizeof(sel_union)); /* waste is insignificant */
+   grpnode->n = 0;
+ 
+   sidnode = xmalloc(sizeof(selection_node));
+-  sidnode->u = xmalloc(i*sizeof(sel_union)); /* waste is insignificant */
++  sidnode->u = xcalloc(i, sizeof(sel_union)); /* waste is insignificant */
+   sidnode->n = 0;
+ 
+   while(i--){
+-- 
+GitLab
+
diff --git a/meta/recipes-extended/procps/procps_4.0.3.bb b/meta/recipes-extended/procps/procps_4.0.3.bb
index 71efb80207..9ef679c6bd 100644
--- a/meta/recipes-extended/procps/procps_4.0.3.bb
+++ b/meta/recipes-extended/procps/procps_4.0.3.bb
@@ -16,6 +16,7 @@ SRC_URI = "git://gitlab.com/procps-ng/procps.git;protocol=https;branch=master \
            file://sysctl.conf \
            file://0001-src-w.c-use-utmp.h-only.patch \
            file://0001-po-fr.po-address-failures-with-gettext-0.22.patch \
+           file://CVE-2023-4016.patch \
            "
 SRCREV = "806eb270f217ff7e1e745c7bda2b002b5be74be4"