gnu: libevent: Update to 2.1.8 [security fixes].

* gnu/packages/libevent.scm (libevent): Update to 2.1.8.
[inputs]: Change 'python-wrapper' to 'python-2'. Move 'which' to ...
[native-inputs]: ... here. New field.
(libevent-2.0): New variable.
* gnu/packages/patches/libevent-2.1-dns-tests.patch,
  gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch
  gnu/packages/patches/libevent-2.0-evdns-fix-searching-empty-hostnames.patch
  gnu/packages/patches/libevent-2.0-evutil-fix-buffer-overflow.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/gnuzilla.scm (icecat)[inputs]: Change 'libevent' to 'libevent-2.0'.

4 files changed, 150 insertions, 0 deletions

diff --git a/gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch b/gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch
new file mode 100644
index 0000000000..f1907d53e2
--- /dev/null
+++ b/gnu/packages/patches/libevent-2.0-evdns-fix-remote-stack-overread.patch
@@ -0,0 +1,42 @@
+Fix buffer overread in libevents DNS code.
+
+Upstream bug report:
+
+https://github.com/libevent/libevent/issues/317
+
+Patch copied from upstream source repository:
+
+https://github.com/libevent/libevent/commit/96f64a022014a208105ead6c8a7066018449d86d
+
+From 3c570970516f48da35f42fef98276531fcc0abaa Mon Sep 17 00:00:00 2001
+From: Azat Khuzhin <a3at.mail@gmail.com>
+Date: Mon, 1 Feb 2016 17:32:09 +0300
+Subject: [PATCH] evdns: name_parse(): fix remote stack overread
+
+---
+ evdns.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/evdns.c b/evdns.c
+index 60b10485..137c24ea 100644
+--- a/evdns.c
++++ b/evdns.c
+@@ -960,7 +960,6 @@ name_parse(u8 *packet, int length, int *idx, char *name_out, int name_out_len) {
+ 
+ 	for (;;) {
+ 		u8 label_len;
+-		if (j >= length) return -1;
+ 		GET8(label_len);
+ 		if (!label_len) break;
+ 		if (label_len & 0xc0) {
+@@ -981,6 +980,7 @@ name_parse(u8 *packet, int length, int *idx, char *name_out, int name_out_len) {
+ 			*cp++ = '.';
+ 		}
+ 		if (cp + label_len >= end) return -1;
++		if (j + label_len > length) return -1;
+ 		memcpy(cp, packet + j, label_len);
+ 		cp += label_len;
+ 		j += label_len;
+-- 
+2.11.0
+
diff --git a/gnu/packages/patches/libevent-2.0-evdns-fix-searching-empty-hostnames.patch b/gnu/packages/patches/libevent-2.0-evdns-fix-searching-empty-hostnames.patch
new file mode 100644
index 0000000000..c4ad0a1a4a
--- /dev/null
+++ b/gnu/packages/patches/libevent-2.0-evdns-fix-searching-empty-hostnames.patch
@@ -0,0 +1,40 @@
+Fix OOB read on empty hostnames in evdns.
+
+Upstream bug report:
+
+https://github.com/libevent/libevent/issues/332
+
+Patch copied from upstream source repository:
+
+https://github.com/libevent/libevent/commit/ec65c42052d95d2c23d1d837136d1cf1d9ecef9e
+
+From a0305cec166a5bc89f1eb362510cc4cd25ecc0bc Mon Sep 17 00:00:00 2001
+From: Azat Khuzhin <a3at.mail@gmail.com>
+Date: Fri, 25 Mar 2016 00:33:47 +0300
+Subject: [PATCH] evdns: fix searching empty hostnames
+
+---
+ evdns.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/evdns.c b/evdns.c
+index 137c24ea..6191c677 100644
+--- a/evdns.c
++++ b/evdns.c
+@@ -3122,9 +3122,12 @@ search_set_from_hostname(struct evdns_base *base) {
+ static char *
+ search_make_new(const struct search_state *const state, int n, const char *const base_name) {
+ 	const size_t base_len = strlen(base_name);
+-	const char need_to_append_dot = base_name[base_len - 1] == '.' ? 0 : 1;
++	char need_to_append_dot;
+ 	struct search_domain *dom;
+ 
++	if (!base_len) return NULL;
++	need_to_append_dot = base_name[base_len - 1] == '.' ? 0 : 1;
++
+ 	for (dom = state->head; dom; dom = dom->next) {
+ 		if (!n--) {
+ 			/* this is the postfix we want */
+-- 
+2.11.0
+
diff --git a/gnu/packages/patches/libevent-2.0-evutil-fix-buffer-overflow.patch b/gnu/packages/patches/libevent-2.0-evutil-fix-buffer-overflow.patch
new file mode 100644
index 0000000000..4d16a4b917
--- /dev/null
+++ b/gnu/packages/patches/libevent-2.0-evutil-fix-buffer-overflow.patch
@@ -0,0 +1,42 @@
+Fix buffer overflow in evutil.
+
+Upstream bug report:
+
+https://github.com/libevent/libevent/issues/318
+
+Patch copied from upstream source repository:
+
+https://github.com/libevent/libevent/commit/329acc18a0768c21ba22522f01a5c7f46cacc4d5
+
+From 28bdc2f3f62259d21ccaf7be2b60ef0a53e6f342 Mon Sep 17 00:00:00 2001
+From: Azat Khuzhin <a3at.mail@gmail.com>
+Date: Sun, 31 Jan 2016 00:57:16 +0300
+Subject: [PATCH] evutil_parse_sockaddr_port(): fix buffer overflow
+
+---
+ evutil.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/evutil.c b/evutil.c
+index 33445170..e2dfe6e4 100644
+--- a/evutil.c
++++ b/evutil.c
+@@ -1808,12 +1808,12 @@ evutil_parse_sockaddr_port(const char *ip_as_string, struct sockaddr *out, int *
+ 
+ 	cp = strchr(ip_as_string, ':');
+ 	if (*ip_as_string == '[') {
+-		int len;
++		size_t len;
+ 		if (!(cp = strchr(ip_as_string, ']'))) {
+ 			return -1;
+ 		}
+-		len = (int) ( cp-(ip_as_string + 1) );
+-		if (len > (int)sizeof(buf)-1) {
++		len = ( cp-(ip_as_string + 1) );
++		if (len > sizeof(buf)-1) {
+ 			return -1;
+ 		}
+ 		memcpy(buf, ip_as_string+1, len);
+-- 
+2.11.0
+
diff --git a/gnu/packages/patches/libevent-2.1-dns-tests.patch b/gnu/packages/patches/libevent-2.1-dns-tests.patch
new file mode 100644
index 0000000000..091752a49d
--- /dev/null
+++ b/gnu/packages/patches/libevent-2.1-dns-tests.patch
@@ -0,0 +1,26 @@
+Disable tests that rely on usable DNS lookups, which aren't available
+in build chroots.
+
+--- libevent-2.0.21-stable/test/regress_dns.c	2013-01-20 22:32:09.000000000 +0100
++++ libevent-2.0.21-stable/test/regress_dns.c	2013-01-20 22:32:30.000000000 +0100
+@@ -2120,10 +2120,6 @@
+ 
+ struct testcase_t dns_testcases[] = {
+ 	DNS_LEGACY(server, TT_FORK|TT_NEED_BASE),
+-	DNS_LEGACY(gethostbyname, TT_FORK|TT_NEED_BASE|TT_NEED_DNS|TT_OFF_BY_DEFAULT),
+-	DNS_LEGACY(gethostbyname6, TT_FORK|TT_NEED_BASE|TT_NEED_DNS|TT_OFF_BY_DEFAULT),
+-	DNS_LEGACY(gethostbyaddr, TT_FORK|TT_NEED_BASE|TT_NEED_DNS|TT_OFF_BY_DEFAULT),
+-	{ "resolve_reverse", dns_resolve_reverse, TT_FORK|TT_OFF_BY_DEFAULT, NULL, NULL },
+ 	{ "search_empty", dns_search_empty_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+ 	{ "search", dns_search_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+ 	{ "search_lower", dns_search_lower_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+@@ -2163,9 +2159,6 @@
+ 
+ 	{ "client_fail_requests", dns_client_fail_requests_test,
+ 	  TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+-	{ "client_fail_requests_getaddrinfo",
+-	  dns_client_fail_requests_getaddrinfo_test,
+-	  TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
+ 
+ 	END_OF_TESTCASES
+ };