Backport patches from upstream to fix build with musl

Audit 2.8.4 fails to build with musl. The fixes have been committed
to the upstream master branch and can be backported.
Building with glibc is unaffected.

Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
Signed-off-by: Joe MacDonald <joe@deserted.net>

3 files changed, 183 insertions, 0 deletions

diff --git a/recipes-security/audit/audit/0001-Remove-strdupa-as-suggested-in-pull-request-25.patch b/recipes-security/audit/audit/0001-Remove-strdupa-as-suggested-in-pull-request-25.patch
new file mode 100644
index 0000000..38029aa
--- /dev/null
+++ b/recipes-security/audit/audit/0001-Remove-strdupa-as-suggested-in-pull-request-25.patch
@@ -0,0 +1,47 @@
+From a1782b58b687b74249dc8b2411a3f646b821ebd6 Mon Sep 17 00:00:00 2001
+From: Steve Grubb <sgrubb@redhat.com>
+Date: Thu, 4 Oct 2018 08:45:47 -0400
+Subject: [PATCH] Remove strdupa as suggested in pull request #25
+
+---
+ src/auditd.c | 11 ++++++-----
+ 1 file changed, 6 insertions(+), 5 deletions(-)
+
+Origin: https://github.com/linux-audit/audit-userspace/commit/a1782b58b687b74249dc8b2411a3f646b821ebd6
+Applied-Upstream: yes
+
+diff --git a/src/auditd.c b/src/auditd.c
+index b0952db..c826ec0 100644
+--- a/src/auditd.c
++++ b/src/auditd.c
+@@ -209,21 +209,22 @@ static void cont_handler(struct ev_loop *loop, struct ev_signal *sig,
+ 
+ static int extract_type(const char *str)
+ {
+-       const char *tptr, *ptr2, *ptr = str;
++       const char *ptr2, *ptr = str;
+        if (*str == 'n') {
+                ptr = strchr(str+1, ' ');
+                if (ptr == NULL)
+                        return -1; // Malformed - bomb out
+                ptr++;
+        }
++
+        // ptr should be at 't'
+        ptr2 = strchr(ptr, ' ');
+-       // get type=xxx in a buffer
+-       tptr = strndupa(ptr, ptr2 - ptr);
++
+        // find =
+-       str = strchr(tptr, '=');
+-       if (str == NULL)
++       str = strchr(ptr, '=');
++       if (str == NULL || str >= ptr2)
+                return -1; // Malformed - bomb out
++
+        // name is 1 past
+        str++;
+        return audit_name_to_msg_type(str);
+-- 
+2.20.1
+
diff --git a/recipes-security/audit/audit/0002-Add-substitue-functions-for-strndupa-rawmemchr.patch b/recipes-security/audit/audit/0002-Add-substitue-functions-for-strndupa-rawmemchr.patch
new file mode 100644
index 0000000..c948aa3
--- /dev/null
+++ b/recipes-security/audit/audit/0002-Add-substitue-functions-for-strndupa-rawmemchr.patch
@@ -0,0 +1,134 @@
+From 5346b6af0ca67a2965ca5846ae150f3021a2aa17 Mon Sep 17 00:00:00 2001
+From: Steve Grubb <sgrubb@redhat.com>
+Date: Tue, 26 Feb 2019 18:33:33 -0500
+Subject: [PATCH] Add substitue functions for strndupa & rawmemchr
+
+---
+Origin: https://github.com/linux-audit/audit-userspace/commit/d579a08bb1cde71f939c13ac6b2261052ae9f77e
+Applied-Upstream: yes
+
+ auparse/auparse.c   | 12 +++++++++++-
+ auparse/interpret.c |  9 ++++++++-
+ configure.ac        | 14 +++++++++++++-
+ src/ausearch-lol.c  | 12 +++++++++++-
+ 4 files changed, 43 insertions(+), 4 deletions(-)
+
+diff --git a/auparse/auparse.c b/auparse/auparse.c
+index f84712e..3764046 100644
+--- a/auparse/auparse.c
++++ b/auparse/auparse.c
+@@ -1,5 +1,5 @@
+ /* auparse.c --
+- * Copyright 2006-08,2012-17 Red Hat Inc., Durham, North Carolina.
++ * Copyright 2006-08,2012-19 Red Hat Inc., Durham, North Carolina.
+  * All Rights Reserved.
+  *
+  * This library is free software; you can redistribute it and/or
+@@ -1100,6 +1100,16 @@ static int str2event(char *s, au_event_t *e)
+        return 0;
+ }
+ 
++#ifndef HAVE_STRNDUPA
++static inline char *strndupa(const char *old, size_t n)
++{
++       size_t len = strnlen(old, n);
++       char *tmp = alloca(len + 1);
++       tmp[len] = 0;
++       return memcpy(tmp, old, len);
++}
++#endif
++
+ /* Returns 0 on success and 1 on error */
+ static int extract_timestamp(const char *b, au_event_t *e)
+ {
+diff --git a/auparse/interpret.c b/auparse/interpret.c
+index 1846f9d..8540bd1 100644
+--- a/auparse/interpret.c
++++ b/auparse/interpret.c
+@@ -853,6 +853,13 @@ err_out:
+                return print_escaped(id->val);
+ }
+ 
++// rawmemchr is faster. Let's use it if we have it.
++#ifdef HAVE_RAWMEMCHR
++#define STRCHR rawmemchr
++#else
++#define STRCHR strchr
++#endif
++
+ static const char *print_proctitle(const char *val)
+ {
+        char *out = (char *)print_escaped(val);
+@@ -863,7 +870,7 @@ static const char *print_proctitle(const char *val)
+                // Proctitle has arguments separated by NUL bytes
+                // We need to write over the NUL bytes with a space
+                // so that we can see the arguments
+-               while ((ptr  = rawmemchr(ptr, '\0'))) {
++               while ((ptr  = STRCHR(ptr, '\0'))) {
+                        if (ptr >= end)
+                                break;
+                        *ptr = ' ';
+diff --git a/configure.ac b/configure.ac
+index ede7109..97b547f 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1,7 +1,7 @@
+ dnl
+ define([AC_INIT_NOTICE],
+ [### Generated automatically using autoconf version] AC_ACVERSION [
+-### Copyright 2005-18 Steve Grubb <sgrubb@redhat.com>
++### Copyright 2005-19 Steve Grubb <sgrubb@redhat.com>
+ ###
+ ### Permission is hereby granted, free of charge, to any person obtaining a
+ ### copy of this software and associated documentation files (the "Software"),
+@@ -72,6 +72,18 @@ dnl; posix_fallocate is used in audisp-remote
+ AC_CHECK_FUNCS([posix_fallocate])
+ dnl; signalfd is needed for libev
+ AC_CHECK_FUNC([signalfd], [], [ AC_MSG_ERROR([The signalfd system call is necessary for auditd]) ])
++dnl; check if rawmemchr is available
++AC_CHECK_FUNCS([rawmemchr])
++dnl; check if strndupa is available
++AC_LINK_IFELSE(
++  [AC_LANG_SOURCE(
++    [[
++      #define _GNU_SOURCE
++      #include <string.h>
++      int main() { (void) strndupa("test", 10); return 0; }]])],
++ [AC_DEFINE(HAVE_STRNDUPA, 1, [Let us know if we have it or not])],
++ []
++)
+ 
+ ALLWARNS=""
+ ALLDEBUG="-g"
+diff --git a/src/ausearch-lol.c b/src/ausearch-lol.c
+index 4fbfbae..5eecefe 100644
+--- a/src/ausearch-lol.c
++++ b/src/ausearch-lol.c
+@@ -1,6 +1,6 @@
+ /*
+ * ausearch-lol.c - linked list of linked lists library
+-* Copyright (c) 2008,2010,2014,2016 Red Hat Inc., Durham, North Carolina.
++* Copyright (c) 2008,2010,2014,2016,2019 Red Hat Inc., Durham, North Carolina.
+ * All Rights Reserved. 
+ *
+ * This software may be freely redistributed and/or modified under the
+@@ -131,6 +131,16 @@ static int inline events_are_equal(event *e1, event *e2)
+        return 1;
+ }
+ 
++#ifndef HAVE_STRNDUPA
++static inline char *strndupa(const char *old, size_t n)
++{
++       size_t len = strnlen(old, n);
++       char *tmp = alloca(len + 1);
++       tmp[len] = 0;
++       return memcpy(tmp, old, len);
++}
++#endif
++
+ /*
+  * This function will look at the line and pick out pieces of it.
+  */
+-- 
+2.20.1
+
diff --git a/recipes-security/audit/audit_2.8.4.bb b/recipes-security/audit/audit_2.8.4.bb
index c756552..c29bb74 100644
--- a/recipes-security/audit/audit_2.8.4.bb
+++ b/recipes-security/audit/audit_2.8.4.bb
@@ -11,6 +11,8 @@ SRC_URI = "http://people.redhat.com/sgrubb/${BPN}/${BPN}-${PV}.tar.gz \
            file://audit-python-configure.patch \
            file://audit-python.patch \
            file://fix-swig-host-contamination.patch \
+           file://0001-Remove-strdupa-as-suggested-in-pull-request-25.patch \
+           file://0002-Add-substitue-functions-for-strndupa-rawmemchr.patch \
            file://auditd \
            file://auditd.service \
            file://audit-volatile.conf \