Bump Buildroot to 2021.02-rc3 (#1260)

* Rebase patches to Buildroot 2021.02-rc3

* Update Buildroot to 2021.02-rc3

* Declare Kernel headers to be Linux version 5.10 (since they are, and new Buildroot knows about 5.10)

buildroot/package/tmux/0001-Do-not-write-after-the-end-of-the-array-and-overwrit.patch

@@ -1,35 +0,0 @@
-From a868bacb46e3c900530bed47a1c6f85b0fbe701c Mon Sep 17 00:00:00 2001
-From: nicm <nicm>
-Date: Thu, 29 Oct 2020 16:33:01 +0000
-Subject: [PATCH] Do not write after the end of the array and overwrite the
- stack when colon-separated SGR sequences contain empty arguments. Reported by
- Sergey Nizovtsev.
-
-[Peter: Fixes CVE-2020-27347]
-Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
----
- input.c | 7 ++++++-
- 1 file changed, 6 insertions(+), 1 deletion(-)
-
-diff --git a/input.c b/input.c
-index 42a60c92..c280c0d9 100644
---- a/input.c
-+++ b/input.c
-@@ -1976,8 +1976,13 @@ input_csi_dispatch_sgr_colon(struct input_ctx *ictx, u_int i)
- 				free(copy);
- 				return;
- 			}
--		} else
-+		} else {
- 			n++;
-+			if (n == nitems(p)) {
-+				free(copy);
-+				return;
-+			}
-+		}
- 		log_debug("%s: %u = %d", __func__, n - 1, p[n - 1]);
- 	}
- 	free(copy);
--- 
-2.20.1
-

buildroot/package/tmux/tmux.hash

@@ -1,3 +1,3 @@
 # Locally computed:
-sha256 839d167a4517a6bffa6b6074e89a9a8630547b2dea2086f1fad15af12ab23b25  tmux-2.9a.tar.gz
-sha256 ce75f1345a76c93bd0f413d1b93ff1baa0669f34a7242779a00c1b862b4f813a  COPYING
+sha256  918f7220447bef33a1902d4faff05317afd9db4ae1c9971bef5c787ac6c88386  tmux-3.1c.tar.gz
+sha256  c031bd37f464c534277814f6aa38686fa023d094261d57fd2545ad592bb53ccd  COPYING

buildroot/package/tmux/tmux.mk

@@ -4,15 +4,13 @@
 #
 ################################################################################
 
-TMUX_VERSION = 2.9a
+TMUX_VERSION = 3.1c
 TMUX_SITE = https://github.com/tmux/tmux/releases/download/$(TMUX_VERSION)
 TMUX_LICENSE = ISC
 TMUX_LICENSE_FILES = COPYING
+TMUX_CPE_ID_VALID = YES
 TMUX_DEPENDENCIES = libevent ncurses host-pkgconf
 
-# 0001-Do-not-write-after-the-end-of-the-array-and-overwrit.patch
-TMUX_IGNORE_CVES += CVE-2020-27347
-
 # Add /usr/bin/tmux to /etc/shells otherwise some login tools like dropbear
 # can reject the user connection. See man shells.
 define TMUX_ADD_TMUX_TO_SHELLS