gnu: json-c: Fix CVE-2020-12762.

* gnu/packages/web.scm (json-c)[replacement]: New field.
(json-c-0.13, json-c-0.12)[source]: Add patch.
(json-c/fixed): New variable.
* gnu/packages/patches/json-c-CVE-2020-12762.patch,
gnu/packages/patches/json-c--0.13-CVE-2020-12762.patch,
gnu/packages/patches/json-c--0.12-CVE-2020-12762.patch: New files.
* gnu/local.mk (dist_patch_DATA): Register them.

3 files changed, 598 insertions, 0 deletions

diff --git a/gnu/packages/patches/json-c-0.12-CVE-2020-12762.patch b/gnu/packages/patches/json-c-0.12-CVE-2020-12762.patch
new file mode 100644
index 0000000000..4c06d124ee
--- /dev/null
+++ b/gnu/packages/patches/json-c-0.12-CVE-2020-12762.patch
@@ -0,0 +1,175 @@
+https://github.com/json-c/json-c/pull/611
+https://github.com/json-c/json-c/commit/74accb17cde1b88794b2b764cabaaf1f0858656c.patch
+
+From 74accb17cde1b88794b2b764cabaaf1f0858656c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
+Date: Fri, 15 May 2020 20:38:40 +0200
+Subject: [PATCH] Fix CVE-2020-12762.
+
+This commit is a squashed and slightly modified backport
+of the following commits on the master branch:
+
+  * 77d935b
+  * d07b910
+  * 519dfe1
+  * a59d5ac
+---
+ linkhash.c           | 12 +++++++++++-
+ printbuf.c           | 18 +++++++++++++++++-
+ tests/test4.c        | 31 ++++++++++++++++++++++++++++++-
+ tests/test4.expected |  1 +
+ 4 files changed, 59 insertions(+), 3 deletions(-)
+
+diff --git a/linkhash.c b/linkhash.c
+index 8791a421e7..6543e171f9 100644
+--- a/linkhash.c
++++ b/linkhash.c
+@@ -10,6 +10,7 @@
+  *
+  */
+ 
++#include <assert.h>
+ #include <stdio.h>
+ #include <string.h>
+ #include <stdlib.h>
+@@ -431,6 +432,8 @@ struct lh_table* lh_table_new(int size, const char *name,
+ 	int i;
+ 	struct lh_table *t;
+ 
++	/* Allocate space for elements to avoid divisions by zero. */
++	assert(size > 0);
+ 	t = (struct lh_table*)calloc(1, sizeof(struct lh_table));
+ 	if(!t) lh_abort("lh_table_new: calloc failed\n");
+ 	t->count = 0;
+@@ -495,7 +498,14 @@ int lh_table_insert(struct lh_table *t, void *k, const void *v)
+ 	unsigned long h, n;
+ 
+ 	t->inserts++;
+-	if(t->count >= t->size * LH_LOAD_FACTOR) lh_table_resize(t, t->size * 2);
++	if (t->count >= t->size * LH_LOAD_FACTOR) {
++		/* Avoid signed integer overflow with large tables. */
++		int new_size = (t->size > INT_MAX / 2) ? INT_MAX : (t->size * 2);
++		if (t->size == INT_MAX)
++			return -1;
++
++		lh_table_resize(t, new_size);
++	}
+ 
+ 	h = t->hash_fn(k);
+ 	n = h % t->size;
+diff --git a/printbuf.c b/printbuf.c
+index 9d56522000..31dd86f87d 100644
+--- a/printbuf.c
++++ b/printbuf.c
+@@ -15,6 +15,7 @@
+ 
+ #include "config.h"
+ 
++#include <limits.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+@@ -63,7 +64,16 @@ static int printbuf_extend(struct printbuf *p, int min_size)
+ 	if (p->size >= min_size)
+ 		return 0;
+ 
+-	new_size = json_max(p->size * 2, min_size + 8);
++	/* Prevent signed integer overflows with large buffers. */
++	if (min_size > INT_MAX - 8)
++		return -1;
++	if (p->size > INT_MAX / 2)
++		new_size =  min_size + 8;
++	else {
++		new_size = p->size * 2;
++		if (new_size < min_size + 8)
++			new_size = min_size + 8;
++	}
+ #ifdef PRINTBUF_DEBUG
+ 	MC_DEBUG("printbuf_memappend: realloc "
+ 	  "bpos=%d min_size=%d old_size=%d new_size=%d\n",
+@@ -78,6 +88,9 @@ static int printbuf_extend(struct printbuf *p, int min_size)
+ 
+ int printbuf_memappend(struct printbuf *p, const char *buf, int size)
+ {
++  /* Prevent signed integer overflows with large buffers. */
++  if (size > INT_MAX - p->bpos - 1)
++    return -1;
+   if (p->size <= p->bpos + size + 1) {
+     if (printbuf_extend(p, p->bpos + size + 1) < 0)
+       return -1;
+@@ -94,6 +107,9 @@ int printbuf_memset(struct printbuf *pb, int offset, int charvalue, int len)
+ 
+ 	if (offset == -1)
+ 		offset = pb->bpos;
++	/* Prevent signed integer overflows with large buffers. */
++	if (len > INT_MAX - offset)
++		return -1;
+ 	size_needed = offset + len;
+ 	if (pb->size < size_needed)
+ 	{
+diff --git a/tests/test4.c b/tests/test4.c
+index 23e97dac1b..8b05848a13 100644
+--- a/tests/test4.c
++++ b/tests/test4.c
+@@ -2,9 +2,11 @@
+  * gcc -o utf8 utf8.c -I/home/y/include -L./.libs -ljson
+  */
+ 
++#include "config.h"
++#include <assert.h>
+ #include <stdio.h>
++#include <stdlib.h>
+ #include <string.h>
+-#include "config.h"
+ 
+ #include "json_inttypes.h"
+ #include "json_object.h"
+@@ -24,6 +26,30 @@ void print_hex( const char* s)
+ 	printf("\n");
+ }
+ 
++static void test_lot_of_adds(void);
++static void test_lot_of_adds()
++{
++	int ii;
++	char key[50];
++	json_object *jobj = json_object_new_object();
++	assert(jobj != NULL);
++	for (ii = 0; ii < 500; ii++)
++	{
++		snprintf(key, sizeof(key), "k%d", ii);
++		json_object *iobj = json_object_new_int(ii);
++		assert(iobj != NULL);
++		json_object_object_add(jobj, key, iobj);
++		if (json_object_object_get_ex(jobj, key, &iobj) == FALSE)
++		{
++			fprintf(stderr, "FAILED to add object #%d\n", ii);
++			abort();
++		}
++	}
++	printf("%s\n", json_object_to_json_string(jobj));
++	assert(json_object_object_length(jobj) == 500);
++	json_object_put(jobj);
++}
++
+ int main()
+ {
+ 	const char *input = "\"\\ud840\\udd26,\\ud840\\udd27,\\ud800\\udd26,\\ud800\\udd27\"";
+@@ -49,5 +75,8 @@ int main()
+ 		retval = 1;
+ 	}
+ 	json_object_put(parse_result);
++
++	test_lot_of_adds();
++
+ 	return retval;
+ }
+diff --git a/tests/test4.expected b/tests/test4.expected
+index 68d4336d90..cb2744012b 100644
+--- a/tests/test4.expected
++++ b/tests/test4.expected
+@@ -1,3 +1,4 @@
+ input: "\ud840\udd26,\ud840\udd27,\ud800\udd26,\ud800\udd27"
+ JSON parse result is correct: 𠄦,𠄧,𐄦,𐄧
+ PASS
++{ "k0": 0, "k1": 1, "k2": 2, "k3": 3, "k4": 4, "k5": 5, "k6": 6, "k7": 7, "k8": 8, "k9": 9, "k10": 10, "k11": 11, "k12": 12, "k13": 13, "k14": 14, "k15": 15, "k16": 16, "k17": 17, "k18": 18, "k19": 19, "k20": 20, "k21": 21, "k22": 22, "k23": 23, "k24": 24, "k25": 25, "k26": 26, "k27": 27, "k28": 28, "k29": 29, "k30": 30, "k31": 31, "k32": 32, "k33": 33, "k34": 34, "k35": 35, "k36": 36, "k37": 37, "k38": 38, "k39": 39, "k40": 40, "k41": 41, "k42": 42, "k43": 43, "k44": 44, "k45": 45, "k46": 46, "k47": 47, "k48": 48, "k49": 49, "k50": 50, "k51": 51, "k52": 52, "k53": 53, "k54": 54, "k55": 55, "k56": 56, "k57": 57, "k58": 58, "k59": 59, "k60": 60, "k61": 61, "k62": 62, "k63": 63, "k64": 64, "k65": 65, "k66": 66, "k67": 67, "k68": 68, "k69": 69, "k70": 70, "k71": 71, "k72": 72, "k73": 73, "k74": 74, "k75": 75, "k76": 76, "k77": 77, "k78": 78, "k79": 79, "k80": 80, "k81": 81, "k82": 82, "k83": 83, "k84": 84, "k85": 85, "k86": 86, "k87": 87, "k88": 88, "k89": 89, "k90": 90, "k91": 91, "k92": 92, "k93": 93, "k94": 94, "k95": 95, "k96": 96, "k97": 97, "k98": 98, "k99": 99, "k100": 100, "k101": 101, "k102": 102, "k103": 103, "k104": 104, "k105": 105, "k106": 106, "k107": 107, "k108": 108, "k109": 109, "k110": 110, "k111": 111, "k112": 112, "k113": 113, "k114": 114, "k115": 115, "k116": 116, "k117": 117, "k118": 118, "k119": 119, "k120": 120, "k121": 121, "k122": 122, "k123": 123, "k124": 124, "k125": 125, "k126": 126, "k127": 127, "k128": 128, "k129": 129, "k130": 130, "k131": 131, "k132": 132, "k133": 133, "k134": 134, "k135": 135, "k136": 136, "k137": 137, "k138": 138, "k139": 139, "k140": 140, "k141": 141, "k142": 142, "k143": 143, "k144": 144, "k145": 145, "k146": 146, "k147": 147, "k148": 148, "k149": 149, "k150": 150, "k151": 151, "k152": 152, "k153": 153, "k154": 154, "k155": 155, "k156": 156, "k157": 157, "k158": 158, "k159": 159, "k160": 160, "k161": 161, "k162": 162, "k163": 163, "k164": 164, "k165": 165, "k166": 166, "k167": 167, "k168": 168, "k169": 169, "k170": 170, "k171": 171, "k172": 172, "k173": 173, "k174": 174, "k175": 175, "k176": 176, "k177": 177, "k178": 178, "k179": 179, "k180": 180, "k181": 181, "k182": 182, "k183": 183, "k184": 184, "k185": 185, "k186": 186, "k187": 187, "k188": 188, "k189": 189, "k190": 190, "k191": 191, "k192": 192, "k193": 193, "k194": 194, "k195": 195, "k196": 196, "k197": 197, "k198": 198, "k199": 199, "k200": 200, "k201": 201, "k202": 202, "k203": 203, "k204": 204, "k205": 205, "k206": 206, "k207": 207, "k208": 208, "k209": 209, "k210": 210, "k211": 211, "k212": 212, "k213": 213, "k214": 214, "k215": 215, "k216": 216, "k217": 217, "k218": 218, "k219": 219, "k220": 220, "k221": 221, "k222": 222, "k223": 223, "k224": 224, "k225": 225, "k226": 226, "k227": 227, "k228": 228, "k229": 229, "k230": 230, "k231": 231, "k232": 232, "k233": 233, "k234": 234, "k235": 235, "k236": 236, "k237": 237, "k238": 238, "k239": 239, "k240": 240, "k241": 241, "k242": 242, "k243": 243, "k244": 244, "k245": 245, "k246": 246, "k247": 247, "k248": 248, "k249": 249, "k250": 250, "k251": 251, "k252": 252, "k253": 253, "k254": 254, "k255": 255, "k256": 256, "k257": 257, "k258": 258, "k259": 259, "k260": 260, "k261": 261, "k262": 262, "k263": 263, "k264": 264, "k265": 265, "k266": 266, "k267": 267, "k268": 268, "k269": 269, "k270": 270, "k271": 271, "k272": 272, "k273": 273, "k274": 274, "k275": 275, "k276": 276, "k277": 277, "k278": 278, "k279": 279, "k280": 280, "k281": 281, "k282": 282, "k283": 283, "k284": 284, "k285": 285, "k286": 286, "k287": 287, "k288": 288, "k289": 289, "k290": 290, "k291": 291, "k292": 292, "k293": 293, "k294": 294, "k295": 295, "k296": 296, "k297": 297, "k298": 298, "k299": 299, "k300": 300, "k301": 301, "k302": 302, "k303": 303, "k304": 304, "k305": 305, "k306": 306, "k307": 307, "k308": 308, "k309": 309, "k310": 310, "k311": 311, "k312": 312, "k313": 313, "k314": 314, "k315": 315, "k316": 316, "k317": 317, "k318": 318, "k319": 319, "k320": 320, "k321": 321, "k322": 322, "k323": 323, "k324": 324, "k325": 325, "k326": 326, "k327": 327, "k328": 328, "k329": 329, "k330": 330, "k331": 331, "k332": 332, "k333": 333, "k334": 334, "k335": 335, "k336": 336, "k337": 337, "k338": 338, "k339": 339, "k340": 340, "k341": 341, "k342": 342, "k343": 343, "k344": 344, "k345": 345, "k346": 346, "k347": 347, "k348": 348, "k349": 349, "k350": 350, "k351": 351, "k352": 352, "k353": 353, "k354": 354, "k355": 355, "k356": 356, "k357": 357, "k358": 358, "k359": 359, "k360": 360, "k361": 361, "k362": 362, "k363": 363, "k364": 364, "k365": 365, "k366": 366, "k367": 367, "k368": 368, "k369": 369, "k370": 370, "k371": 371, "k372": 372, "k373": 373, "k374": 374, "k375": 375, "k376": 376, "k377": 377, "k378": 378, "k379": 379, "k380": 380, "k381": 381, "k382": 382, "k383": 383, "k384": 384, "k385": 385, "k386": 386, "k387": 387, "k388": 388, "k389": 389, "k390": 390, "k391": 391, "k392": 392, "k393": 393, "k394": 394, "k395": 395, "k396": 396, "k397": 397, "k398": 398, "k399": 399, "k400": 400, "k401": 401, "k402": 402, "k403": 403, "k404": 404, "k405": 405, "k406": 406, "k407": 407, "k408": 408, "k409": 409, "k410": 410, "k411": 411, "k412": 412, "k413": 413, "k414": 414, "k415": 415, "k416": 416, "k417": 417, "k418": 418, "k419": 419, "k420": 420, "k421": 421, "k422": 422, "k423": 423, "k424": 424, "k425": 425, "k426": 426, "k427": 427, "k428": 428, "k429": 429, "k430": 430, "k431": 431, "k432": 432, "k433": 433, "k434": 434, "k435": 435, "k436": 436, "k437": 437, "k438": 438, "k439": 439, "k440": 440, "k441": 441, "k442": 442, "k443": 443, "k444": 444, "k445": 445, "k446": 446, "k447": 447, "k448": 448, "k449": 449, "k450": 450, "k451": 451, "k452": 452, "k453": 453, "k454": 454, "k455": 455, "k456": 456, "k457": 457, "k458": 458, "k459": 459, "k460": 460, "k461": 461, "k462": 462, "k463": 463, "k464": 464, "k465": 465, "k466": 466, "k467": 467, "k468": 468, "k469": 469, "k470": 470, "k471": 471, "k472": 472, "k473": 473, "k474": 474, "k475": 475, "k476": 476, "k477": 477, "k478": 478, "k479": 479, "k480": 480, "k481": 481, "k482": 482, "k483": 483, "k484": 484, "k485": 485, "k486": 486, "k487": 487, "k488": 488, "k489": 489, "k490": 490, "k491": 491, "k492": 492, "k493": 493, "k494": 494, "k495": 495, "k496": 496, "k497": 497, "k498": 498, "k499": 499 }
diff --git a/gnu/packages/patches/json-c-0.13-CVE-2020-12762.patch b/gnu/packages/patches/json-c-0.13-CVE-2020-12762.patch
new file mode 100644
index 0000000000..7a6743bcc0
--- /dev/null
+++ b/gnu/packages/patches/json-c-0.13-CVE-2020-12762.patch
@@ -0,0 +1,230 @@
+https://github.com/json-c/json-c/pull/607
+https://github.com/json-c/json-c/commit/865b5a65199973bb63dff8e47a2f57e04fec9736.patch
+
+From 865b5a65199973bb63dff8e47a2f57e04fec9736 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
+Date: Thu, 14 May 2020 12:32:30 +0200
+Subject: [PATCH] Fix CVE-2020-12762.
+
+This commit is a squashed backport of the following commits
+on the master branch:
+
+  * 099016b7e8d70a6d5dd814e788bba08d33d48426
+  * 77d935b7ae7871a1940cd827e850e6063044ec45
+  * d07b91014986900a3a75f306d302e13e005e9d67
+  * 519dfe1591d85432986f9762d41d1a883198c157
+  * a59d5acfab4485d5133114df61785b1fc633e0c6
+---
+ arraylist.c          |  3 +++
+ linkhash.c           | 21 ++++++++++++++-------
+ printbuf.c           | 38 ++++++++++++++++++++++++++------------
+ tests/test4.c        | 30 +++++++++++++++++++++++++++++-
+ tests/test4.expected |  1 +
+ 5 files changed, 73 insertions(+), 20 deletions(-)
+
+diff --git a/arraylist.c b/arraylist.c
+index ddeb8d4eb4..e737052e32 100644
+--- a/arraylist.c
++++ b/arraylist.c
+@@ -135,6 +135,9 @@ array_list_del_idx( struct array_list *arr, size_t idx, size_t count )
+ {
+ 	size_t i, stop;
+ 
++	/* Avoid overflow in calculation with large indices. */
++	if (idx > SIZE_T_MAX - count)
++		return -1;
+ 	stop = idx + count;
+ 	if ( idx >= arr->length || stop > arr->length ) return -1;
+ 	for ( i = idx; i < stop; ++i ) {
+diff --git a/linkhash.c b/linkhash.c
+index 5497061a8a..6435a154ac 100644
+--- a/linkhash.c
++++ b/linkhash.c
+@@ -12,12 +12,13 @@
+ 
+ #include "config.h"
+ 
+-#include <stdio.h>
+-#include <string.h>
+-#include <stdlib.h>
++#include <assert.h>
++#include <limits.h>
+ #include <stdarg.h>
+ #include <stddef.h>
+-#include <limits.h>
++#include <stdio.h>
++#include <stdlib.h>
++#include <string.h>
+ 
+ #ifdef HAVE_ENDIAN_H
+ # include <endian.h>    /* attempt to define endianness */
+@@ -28,8 +29,8 @@
+ # include <windows.h>   /* Get InterlockedCompareExchange */
+ #endif
+ 
+-#include "random_seed.h"
+ #include "linkhash.h"
++#include "random_seed.h"
+ 
+ /* hash functions */
+ static unsigned long lh_char_hash(const void *k);
+@@ -498,7 +499,9 @@ struct lh_table* lh_table_new(int size,
+ 	int i;
+ 	struct lh_table *t;
+ 
+-	t = (struct lh_table*)calloc(1, sizeof(struct lh_table));
++	/* Allocate space for elements to avoid divisions by zero. */
++	assert(size > 0);
++	t = (struct lh_table *)calloc(1, sizeof(struct lh_table));
+ 	if (!t)
+ 		return NULL;
+ 
+@@ -577,8 +580,12 @@ int lh_table_insert_w_hash(struct lh_table *t, const void *k, const void *v, con
+ 	unsigned long n;
+ 
+ 	if (t->count >= t->size * LH_LOAD_FACTOR)
+-		if (lh_table_resize(t, t->size * 2) != 0)
++	{
++		/* Avoid signed integer overflow with large tables. */
++		int new_size = (t->size > INT_MAX / 2) ? INT_MAX : (t->size * 2);
++		if (t->size == INT_MAX || lh_table_resize(t, new_size) != 0)
+ 			return -1;
++	}
+ 
+ 	n = h % t->size;
+ 
+diff --git a/printbuf.c b/printbuf.c
+index 6c77b5defd..6fc56de455 100644
+--- a/printbuf.c
++++ b/printbuf.c
+@@ -15,6 +15,7 @@
+ 
+ #include "config.h"
+ 
++#include <limits.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+@@ -64,10 +65,16 @@ static int printbuf_extend(struct printbuf *p, int min_size)
+ 
+ 	if (p->size >= min_size)
+ 		return 0;
+-
+-	new_size = p->size * 2;
+-	if (new_size < min_size + 8)
+-		new_size =  min_size + 8;
++	/* Prevent signed integer overflows with large buffers. */
++	if (min_size > INT_MAX - 8)
++		return -1;
++	if (p->size > INT_MAX / 2)
++		new_size = min_size + 8;
++	else {
++		new_size = p->size * 2;
++		if (new_size < min_size + 8)
++			new_size = min_size + 8;
++	}
+ #ifdef PRINTBUF_DEBUG
+ 	MC_DEBUG("printbuf_memappend: realloc "
+ 	  "bpos=%d min_size=%d old_size=%d new_size=%d\n",
+@@ -82,14 +89,18 @@ static int printbuf_extend(struct printbuf *p, int min_size)
+ 
+ int printbuf_memappend(struct printbuf *p, const char *buf, int size)
+ {
+-  if (p->size <= p->bpos + size + 1) {
+-    if (printbuf_extend(p, p->bpos + size + 1) < 0)
+-      return -1;
+-  }
+-  memcpy(p->buf + p->bpos, buf, size);
+-  p->bpos += size;
+-  p->buf[p->bpos]= '\0';
+-  return size;
++	/* Prevent signed integer overflows with large buffers. */
++	if (size > INT_MAX - p->bpos - 1)
++		return -1;
++	if (p->size <= p->bpos + size + 1)
++	{
++		if (printbuf_extend(p, p->bpos + size + 1) < 0)
++			return -1;
++	}
++	memcpy(p->buf + p->bpos, buf, size);
++	p->bpos += size;
++	p->buf[p->bpos] = '\0';
++	return size;
+ }
+ 
+ int printbuf_memset(struct printbuf *pb, int offset, int charvalue, int len)
+@@ -98,6 +109,9 @@ int printbuf_memset(struct printbuf *pb, int offset, int charvalue, int len)
+ 
+ 	if (offset == -1)
+ 		offset = pb->bpos;
++	/* Prevent signed integer overflows with large buffers. */
++	if (len > INT_MAX - offset)
++		return -1;
+ 	size_needed = offset + len;
+ 	if (pb->size < size_needed)
+ 	{
+diff --git a/tests/test4.c b/tests/test4.c
+index fc8b79dbf4..82d3f494de 100644
+--- a/tests/test4.c
++++ b/tests/test4.c
+@@ -2,9 +2,11 @@
+  * gcc -o utf8 utf8.c -I/home/y/include -L./.libs -ljson
+  */
+ 
++#include "config.h"
++#include <assert.h>
+ #include <stdio.h>
++#include <stdlib.h>
+ #include <string.h>
+-#include "config.h"
+ 
+ #include "json_inttypes.h"
+ #include "json_object.h"
+@@ -24,6 +26,29 @@ void print_hex(const char* s)
+ 	putchar('\n');
+ }
+ 
++static void test_lot_of_adds(void);
++static void test_lot_of_adds()
++{
++	int ii;
++	char key[50];
++	json_object *jobj = json_object_new_object();
++	assert(jobj != NULL);
++	for (ii = 0; ii < 500; ii++)
++	{
++		snprintf(key, sizeof(key), "k%d", ii);
++		json_object *iobj = json_object_new_int(ii);
++		assert(iobj != NULL);
++		if (json_object_object_add(jobj, key, iobj))
++		{
++			fprintf(stderr, "FAILED to add object #%d\n", ii);
++			abort();
++		}
++	}
++	printf("%s\n", json_object_to_json_string(jobj));
++	assert(json_object_object_length(jobj) == 500);
++	json_object_put(jobj);
++}
++
+ int main(void)
+ {
+ 	const char *input = "\"\\ud840\\udd26,\\ud840\\udd27,\\ud800\\udd26,\\ud800\\udd27\"";
+@@ -49,5 +74,8 @@ int main(void)
+ 		retval = 1;
+ 	}
+ 	json_object_put(parse_result);
++
++	test_lot_of_adds();
++
+ 	return retval;
+ }
+diff --git a/tests/test4.expected b/tests/test4.expected
+index 68d4336d90..cb2744012b 100644
+--- a/tests/test4.expected
++++ b/tests/test4.expected
+@@ -1,3 +1,4 @@
+ input: "\ud840\udd26,\ud840\udd27,\ud800\udd26,\ud800\udd27"
+ JSON parse result is correct: 𠄦,𠄧,𐄦,𐄧
+ PASS
++{ "k0": 0, "k1": 1, "k2": 2, "k3": 3, "k4": 4, "k5": 5, "k6": 6, "k7": 7, "k8": 8, "k9": 9, "k10": 10, "k11": 11, "k12": 12, "k13": 13, "k14": 14, "k15": 15, "k16": 16, "k17": 17, "k18": 18, "k19": 19, "k20": 20, "k21": 21, "k22": 22, "k23": 23, "k24": 24, "k25": 25, "k26": 26, "k27": 27, "k28": 28, "k29": 29, "k30": 30, "k31": 31, "k32": 32, "k33": 33, "k34": 34, "k35": 35, "k36": 36, "k37": 37, "k38": 38, "k39": 39, "k40": 40, "k41": 41, "k42": 42, "k43": 43, "k44": 44, "k45": 45, "k46": 46, "k47": 47, "k48": 48, "k49": 49, "k50": 50, "k51": 51, "k52": 52, "k53": 53, "k54": 54, "k55": 55, "k56": 56, "k57": 57, "k58": 58, "k59": 59, "k60": 60, "k61": 61, "k62": 62, "k63": 63, "k64": 64, "k65": 65, "k66": 66, "k67": 67, "k68": 68, "k69": 69, "k70": 70, "k71": 71, "k72": 72, "k73": 73, "k74": 74, "k75": 75, "k76": 76, "k77": 77, "k78": 78, "k79": 79, "k80": 80, "k81": 81, "k82": 82, "k83": 83, "k84": 84, "k85": 85, "k86": 86, "k87": 87, "k88": 88, "k89": 89, "k90": 90, "k91": 91, "k92": 92, "k93": 93, "k94": 94, "k95": 95, "k96": 96, "k97": 97, "k98": 98, "k99": 99, "k100": 100, "k101": 101, "k102": 102, "k103": 103, "k104": 104, "k105": 105, "k106": 106, "k107": 107, "k108": 108, "k109": 109, "k110": 110, "k111": 111, "k112": 112, "k113": 113, "k114": 114, "k115": 115, "k116": 116, "k117": 117, "k118": 118, "k119": 119, "k120": 120, "k121": 121, "k122": 122, "k123": 123, "k124": 124, "k125": 125, "k126": 126, "k127": 127, "k128": 128, "k129": 129, "k130": 130, "k131": 131, "k132": 132, "k133": 133, "k134": 134, "k135": 135, "k136": 136, "k137": 137, "k138": 138, "k139": 139, "k140": 140, "k141": 141, "k142": 142, "k143": 143, "k144": 144, "k145": 145, "k146": 146, "k147": 147, "k148": 148, "k149": 149, "k150": 150, "k151": 151, "k152": 152, "k153": 153, "k154": 154, "k155": 155, "k156": 156, "k157": 157, "k158": 158, "k159": 159, "k160": 160, "k161": 161, "k162": 162, "k163": 163, "k164": 164, "k165": 165, "k166": 166, "k167": 167, "k168": 168, "k169": 169, "k170": 170, "k171": 171, "k172": 172, "k173": 173, "k174": 174, "k175": 175, "k176": 176, "k177": 177, "k178": 178, "k179": 179, "k180": 180, "k181": 181, "k182": 182, "k183": 183, "k184": 184, "k185": 185, "k186": 186, "k187": 187, "k188": 188, "k189": 189, "k190": 190, "k191": 191, "k192": 192, "k193": 193, "k194": 194, "k195": 195, "k196": 196, "k197": 197, "k198": 198, "k199": 199, "k200": 200, "k201": 201, "k202": 202, "k203": 203, "k204": 204, "k205": 205, "k206": 206, "k207": 207, "k208": 208, "k209": 209, "k210": 210, "k211": 211, "k212": 212, "k213": 213, "k214": 214, "k215": 215, "k216": 216, "k217": 217, "k218": 218, "k219": 219, "k220": 220, "k221": 221, "k222": 222, "k223": 223, "k224": 224, "k225": 225, "k226": 226, "k227": 227, "k228": 228, "k229": 229, "k230": 230, "k231": 231, "k232": 232, "k233": 233, "k234": 234, "k235": 235, "k236": 236, "k237": 237, "k238": 238, "k239": 239, "k240": 240, "k241": 241, "k242": 242, "k243": 243, "k244": 244, "k245": 245, "k246": 246, "k247": 247, "k248": 248, "k249": 249, "k250": 250, "k251": 251, "k252": 252, "k253": 253, "k254": 254, "k255": 255, "k256": 256, "k257": 257, "k258": 258, "k259": 259, "k260": 260, "k261": 261, "k262": 262, "k263": 263, "k264": 264, "k265": 265, "k266": 266, "k267": 267, "k268": 268, "k269": 269, "k270": 270, "k271": 271, "k272": 272, "k273": 273, "k274": 274, "k275": 275, "k276": 276, "k277": 277, "k278": 278, "k279": 279, "k280": 280, "k281": 281, "k282": 282, "k283": 283, "k284": 284, "k285": 285, "k286": 286, "k287": 287, "k288": 288, "k289": 289, "k290": 290, "k291": 291, "k292": 292, "k293": 293, "k294": 294, "k295": 295, "k296": 296, "k297": 297, "k298": 298, "k299": 299, "k300": 300, "k301": 301, "k302": 302, "k303": 303, "k304": 304, "k305": 305, "k306": 306, "k307": 307, "k308": 308, "k309": 309, "k310": 310, "k311": 311, "k312": 312, "k313": 313, "k314": 314, "k315": 315, "k316": 316, "k317": 317, "k318": 318, "k319": 319, "k320": 320, "k321": 321, "k322": 322, "k323": 323, "k324": 324, "k325": 325, "k326": 326, "k327": 327, "k328": 328, "k329": 329, "k330": 330, "k331": 331, "k332": 332, "k333": 333, "k334": 334, "k335": 335, "k336": 336, "k337": 337, "k338": 338, "k339": 339, "k340": 340, "k341": 341, "k342": 342, "k343": 343, "k344": 344, "k345": 345, "k346": 346, "k347": 347, "k348": 348, "k349": 349, "k350": 350, "k351": 351, "k352": 352, "k353": 353, "k354": 354, "k355": 355, "k356": 356, "k357": 357, "k358": 358, "k359": 359, "k360": 360, "k361": 361, "k362": 362, "k363": 363, "k364": 364, "k365": 365, "k366": 366, "k367": 367, "k368": 368, "k369": 369, "k370": 370, "k371": 371, "k372": 372, "k373": 373, "k374": 374, "k375": 375, "k376": 376, "k377": 377, "k378": 378, "k379": 379, "k380": 380, "k381": 381, "k382": 382, "k383": 383, "k384": 384, "k385": 385, "k386": 386, "k387": 387, "k388": 388, "k389": 389, "k390": 390, "k391": 391, "k392": 392, "k393": 393, "k394": 394, "k395": 395, "k396": 396, "k397": 397, "k398": 398, "k399": 399, "k400": 400, "k401": 401, "k402": 402, "k403": 403, "k404": 404, "k405": 405, "k406": 406, "k407": 407, "k408": 408, "k409": 409, "k410": 410, "k411": 411, "k412": 412, "k413": 413, "k414": 414, "k415": 415, "k416": 416, "k417": 417, "k418": 418, "k419": 419, "k420": 420, "k421": 421, "k422": 422, "k423": 423, "k424": 424, "k425": 425, "k426": 426, "k427": 427, "k428": 428, "k429": 429, "k430": 430, "k431": 431, "k432": 432, "k433": 433, "k434": 434, "k435": 435, "k436": 436, "k437": 437, "k438": 438, "k439": 439, "k440": 440, "k441": 441, "k442": 442, "k443": 443, "k444": 444, "k445": 445, "k446": 446, "k447": 447, "k448": 448, "k449": 449, "k450": 450, "k451": 451, "k452": 452, "k453": 453, "k454": 454, "k455": 455, "k456": 456, "k457": 457, "k458": 458, "k459": 459, "k460": 460, "k461": 461, "k462": 462, "k463": 463, "k464": 464, "k465": 465, "k466": 466, "k467": 467, "k468": 468, "k469": 469, "k470": 470, "k471": 471, "k472": 472, "k473": 473, "k474": 474, "k475": 475, "k476": 476, "k477": 477, "k478": 478, "k479": 479, "k480": 480, "k481": 481, "k482": 482, "k483": 483, "k484": 484, "k485": 485, "k486": 486, "k487": 487, "k488": 488, "k489": 489, "k490": 490, "k491": 491, "k492": 492, "k493": 493, "k494": 494, "k495": 495, "k496": 496, "k497": 497, "k498": 498, "k499": 499 }
diff --git a/gnu/packages/patches/json-c-CVE-2020-12762.patch b/gnu/packages/patches/json-c-CVE-2020-12762.patch
new file mode 100644
index 0000000000..80daa475e9
--- /dev/null
+++ b/gnu/packages/patches/json-c-CVE-2020-12762.patch
@@ -0,0 +1,193 @@
+https://github.com/json-c/json-c/pull/608
+https://github.com/json-c/json-c/commit/5d6fa331418d49f1bd488553fd1cfa9ab023fabb.patch
+
+From 5d6fa331418d49f1bd488553fd1cfa9ab023fabb Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
+Date: Thu, 14 May 2020 12:32:30 +0200
+Subject: [PATCH] Fix CVE-2020-12762.
+
+This commit is a squashed backport of the following commits
+on the master branch:
+
+  * 099016b7e8d70a6d5dd814e788bba08d33d48426
+  * 77d935b7ae7871a1940cd827e850e6063044ec45
+  * d07b91014986900a3a75f306d302e13e005e9d67
+  * 519dfe1591d85432986f9762d41d1a883198c157
+  * a59d5acfab4485d5133114df61785b1fc633e0c6
+  * 26f080997d41cfdb17beab65e90c82217d0ac43b
+---
+ arraylist.c          |  3 +++
+ linkhash.c           |  9 ++++++++-
+ printbuf.c           | 18 ++++++++++++++++--
+ tests/test4.c        | 29 +++++++++++++++++++++++++++++
+ tests/test4.expected |  1 +
+ 5 files changed, 57 insertions(+), 3 deletions(-)
+
+diff --git a/arraylist.c b/arraylist.c
+index 12ad8af6d3..e5524aca75 100644
+--- a/arraylist.c
++++ b/arraylist.c
+@@ -136,6 +136,9 @@ int array_list_del_idx(struct array_list *arr, size_t idx, size_t count)
+ {
+ 	size_t i, stop;
+ 
++	/* Avoid overflow in calculation with large indices. */
++	if (idx > SIZE_T_MAX - count)
++		return -1;
+ 	stop = idx + count;
+ 	if (idx >= arr->length || stop > arr->length)
+ 		return -1;
+diff --git a/linkhash.c b/linkhash.c
+index 7ea58c0abf..b021ef10b0 100644
+--- a/linkhash.c
++++ b/linkhash.c
+@@ -12,6 +12,7 @@
+ 
+ #include "config.h"
+ 
++#include <assert.h>
+ #include <limits.h>
+ #include <stdarg.h>
+ #include <stddef.h>
+@@ -499,6 +500,8 @@ struct lh_table *lh_table_new(int size, lh_entry_free_fn *free_fn, lh_hash_fn *h
+ 	int i;
+ 	struct lh_table *t;
+ 
++	/* Allocate space for elements to avoid divisions by zero. */
++	assert(size > 0);
+ 	t = (struct lh_table *)calloc(1, sizeof(struct lh_table));
+ 	if (!t)
+ 		return NULL;
+@@ -578,8 +581,12 @@ int lh_table_insert_w_hash(struct lh_table *t, const void *k, const void *v, con
+ 	unsigned long n;
+ 
+ 	if (t->count >= t->size * LH_LOAD_FACTOR)
+-		if (lh_table_resize(t, t->size * 2) != 0)
++	{
++		/* Avoid signed integer overflow with large tables. */
++		int new_size = (t->size > INT_MAX / 2) ? INT_MAX : (t->size * 2);
++		if (t->size == INT_MAX || lh_table_resize(t, new_size) != 0)
+ 			return -1;
++	}
+ 
+ 	n = h % t->size;
+ 
+diff --git a/printbuf.c b/printbuf.c
+index 976c12dde5..f9b15b1191 100644
+--- a/printbuf.c
++++ b/printbuf.c
+@@ -15,6 +15,7 @@
+ 
+ #include "config.h"
+ 
++#include <limits.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+@@ -66,9 +67,16 @@ static int printbuf_extend(struct printbuf *p, int min_size)
+ 	if (p->size >= min_size)
+ 		return 0;
+ 
+-	new_size = p->size * 2;
+-	if (new_size < min_size + 8)
++	/* Prevent signed integer overflows with large buffers. */
++	if (min_size > INT_MAX - 8)
++		return -1;
++	if (p->size > INT_MAX / 2)
+ 		new_size = min_size + 8;
++	else {
++		new_size = p->size * 2;
++		if (new_size < min_size + 8)
++			new_size = min_size + 8;
++	}
+ #ifdef PRINTBUF_DEBUG
+ 	MC_DEBUG("printbuf_memappend: realloc "
+ 	         "bpos=%d min_size=%d old_size=%d new_size=%d\n",
+@@ -83,6 +91,9 @@ static int printbuf_extend(struct printbuf *p, int min_size)
+ 
+ int printbuf_memappend(struct printbuf *p, const char *buf, int size)
+ {
++	/* Prevent signed integer overflows with large buffers. */
++	if (size > INT_MAX - p->bpos - 1)
++		return -1;
+ 	if (p->size <= p->bpos + size + 1)
+ 	{
+ 		if (printbuf_extend(p, p->bpos + size + 1) < 0)
+@@ -100,6 +111,9 @@ int printbuf_memset(struct printbuf *pb, int offset, int charvalue, int len)
+ 
+ 	if (offset == -1)
+ 		offset = pb->bpos;
++	/* Prevent signed integer overflows with large buffers. */
++	if (len > INT_MAX - offset)
++		return -1;
+ 	size_needed = offset + len;
+ 	if (pb->size < size_needed)
+ 	{
+diff --git a/tests/test4.c b/tests/test4.c
+index bd964ec789..288cec1792 100644
+--- a/tests/test4.c
++++ b/tests/test4.c
+@@ -3,12 +3,15 @@
+  */
+ 
+ #include "config.h"
++#include <assert.h>
+ #include <stdio.h>
++#include <stdlib.h>
+ #include <string.h>
+ 
+ #include "json_inttypes.h"
+ #include "json_object.h"
+ #include "json_tokener.h"
++#include "snprintf_compat.h"
+ 
+ void print_hex(const char *s)
+ {
+@@ -24,6 +27,29 @@ void print_hex(const char *s)
+ 	putchar('\n');
+ }
+ 
++static void test_lot_of_adds(void);
++static void test_lot_of_adds()
++{
++	int ii;
++	char key[50];
++	json_object *jobj = json_object_new_object();
++	assert(jobj != NULL);
++	for (ii = 0; ii < 500; ii++)
++	{
++		snprintf(key, sizeof(key), "k%d", ii);
++		json_object *iobj = json_object_new_int(ii);
++		assert(iobj != NULL);
++		if (json_object_object_add(jobj, key, iobj))
++		{
++			fprintf(stderr, "FAILED to add object #%d\n", ii);
++			abort();
++		}
++	}
++	printf("%s\n", json_object_to_json_string(jobj));
++	assert(json_object_object_length(jobj) == 500);
++	json_object_put(jobj);
++}
++
+ int main(void)
+ {
+ 	const char *input = "\"\\ud840\\udd26,\\ud840\\udd27,\\ud800\\udd26,\\ud800\\udd27\"";
+@@ -52,5 +78,8 @@ int main(void)
+ 		retval = 1;
+ 	}
+ 	json_object_put(parse_result);
++
++	test_lot_of_adds();
++
+ 	return retval;
+ }
+diff --git a/tests/test4.expected b/tests/test4.expected
+index 68d4336d90..cb2744012b 100644
+--- a/tests/test4.expected
++++ b/tests/test4.expected
+@@ -1,3 +1,4 @@
+ input: "\ud840\udd26,\ud840\udd27,\ud800\udd26,\ud800\udd27"
+ JSON parse result is correct: 𠄦,𠄧,𐄦,𐄧
+ PASS
++{ "k0": 0, "k1": 1, "k2": 2, "k3": 3, "k4": 4, "k5": 5, "k6": 6, "k7": 7, "k8": 8, "k9": 9, "k10": 10, "k11": 11, "k12": 12, "k13": 13, "k14": 14, "k15": 15, "k16": 16, "k17": 17, "k18": 18, "k19": 19, "k20": 20, "k21": 21, "k22": 22, "k23": 23, "k24": 24, "k25": 25, "k26": 26, "k27": 27, "k28": 28, "k29": 29, "k30": 30, "k31": 31, "k32": 32, "k33": 33, "k34": 34, "k35": 35, "k36": 36, "k37": 37, "k38": 38, "k39": 39, "k40": 40, "k41": 41, "k42": 42, "k43": 43, "k44": 44, "k45": 45, "k46": 46, "k47": 47, "k48": 48, "k49": 49, "k50": 50, "k51": 51, "k52": 52, "k53": 53, "k54": 54, "k55": 55, "k56": 56, "k57": 57, "k58": 58, "k59": 59, "k60": 60, "k61": 61, "k62": 62, "k63": 63, "k64": 64, "k65": 65, "k66": 66, "k67": 67, "k68": 68, "k69": 69, "k70": 70, "k71": 71, "k72": 72, "k73": 73, "k74": 74, "k75": 75, "k76": 76, "k77": 77, "k78": 78, "k79": 79, "k80": 80, "k81": 81, "k82": 82, "k83": 83, "k84": 84, "k85": 85, "k86": 86, "k87": 87, "k88": 88, "k89": 89, "k90": 90, "k91": 91, "k92": 92, "k93": 93, "k94": 94, "k95": 95, "k96": 96, "k97": 97, "k98": 98, "k99": 99, "k100": 100, "k101": 101, "k102": 102, "k103": 103, "k104": 104, "k105": 105, "k106": 106, "k107": 107, "k108": 108, "k109": 109, "k110": 110, "k111": 111, "k112": 112, "k113": 113, "k114": 114, "k115": 115, "k116": 116, "k117": 117, "k118": 118, "k119": 119, "k120": 120, "k121": 121, "k122": 122, "k123": 123, "k124": 124, "k125": 125, "k126": 126, "k127": 127, "k128": 128, "k129": 129, "k130": 130, "k131": 131, "k132": 132, "k133": 133, "k134": 134, "k135": 135, "k136": 136, "k137": 137, "k138": 138, "k139": 139, "k140": 140, "k141": 141, "k142": 142, "k143": 143, "k144": 144, "k145": 145, "k146": 146, "k147": 147, "k148": 148, "k149": 149, "k150": 150, "k151": 151, "k152": 152, "k153": 153, "k154": 154, "k155": 155, "k156": 156, "k157": 157, "k158": 158, "k159": 159, "k160": 160, "k161": 161, "k162": 162, "k163": 163, "k164": 164, "k165": 165, "k166": 166, "k167": 167, "k168": 168, "k169": 169, "k170": 170, "k171": 171, "k172": 172, "k173": 173, "k174": 174, "k175": 175, "k176": 176, "k177": 177, "k178": 178, "k179": 179, "k180": 180, "k181": 181, "k182": 182, "k183": 183, "k184": 184, "k185": 185, "k186": 186, "k187": 187, "k188": 188, "k189": 189, "k190": 190, "k191": 191, "k192": 192, "k193": 193, "k194": 194, "k195": 195, "k196": 196, "k197": 197, "k198": 198, "k199": 199, "k200": 200, "k201": 201, "k202": 202, "k203": 203, "k204": 204, "k205": 205, "k206": 206, "k207": 207, "k208": 208, "k209": 209, "k210": 210, "k211": 211, "k212": 212, "k213": 213, "k214": 214, "k215": 215, "k216": 216, "k217": 217, "k218": 218, "k219": 219, "k220": 220, "k221": 221, "k222": 222, "k223": 223, "k224": 224, "k225": 225, "k226": 226, "k227": 227, "k228": 228, "k229": 229, "k230": 230, "k231": 231, "k232": 232, "k233": 233, "k234": 234, "k235": 235, "k236": 236, "k237": 237, "k238": 238, "k239": 239, "k240": 240, "k241": 241, "k242": 242, "k243": 243, "k244": 244, "k245": 245, "k246": 246, 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