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- (djm) [openbsd-compat/Makefile.in openbsd-compat/kludge-fd_set.c]

Browse Source 
[openbsd-compat/openbsd-compat.h] Kludge around bad glibc
   _FORTIFY_SOURCE check that doesn't grok heap-allocated fd_sets;
   ok dtucker@
This commit is contained in:
Damien Miller 2014-10-01 09:43:07 +10:00
parent 0fa0ed061b
commit 703b98a267
4 changed files with 53 additions and 3 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
20141001
- (djm) [openbsd-compat/Makefile.in openbsd-compat/kludge-fd_set.c]
[openbsd-compat/openbsd-compat.h] Kludge around bad glibc
_FORTIFY_SOURCE check that doesn't grok heap-allocated fd_sets;
ok dtucker@
20140910
- (djm) [sandbox-seccomp-filter.c] Allow mremap and exit for DietLibc;
patch from Felix von Leitner; ok dtucker

4
openbsd-compat/Makefile.in
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@ -1,4 +1,4 @@
# $Id: Makefile.in,v 1.55 2014/02/04 00:37:50 djm Exp $
# $Id: Makefile.in,v 1.56 2014/09/30 23:43:08 djm Exp $
sysconfdir=@sysconfdir@
piddir=@piddir@
@ -18,7 +18,7 @@ LDFLAGS=-L. @LDFLAGS@
OPENBSD=base64.o basename.o bcrypt_pbkdf.o bindresvport.o blowfish.o daemon.o dirname.o fmt_scaled.o getcwd.o getgrouplist.o getopt_long.o getrrsetbyname.o glob.o inet_aton.o inet_ntoa.o inet_ntop.o mktemp.o pwcache.o readpassphrase.o realpath.o rresvport.o setenv.o setproctitle.o sha2.o sigact.o strlcat.o strlcpy.o strmode.o strnlen.o strptime.o strsep.o strtonum.o strtoll.o strtoul.o strtoull.o timingsafe_bcmp.o vis.o blowfish.o bcrypt_pbkdf.o explicit_bzero.o
COMPAT=arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o getrrsetbyname-ldns.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-setres_id.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o
COMPAT=arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o getrrsetbyname-ldns.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-setres_id.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o kludge-fd_set.o
PORTS=port-aix.o port-irix.o port-linux.o port-solaris.o port-tun.o port-uw.o

28
openbsd-compat/kludge-fd_set.c Normal file
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@ -0,0 +1,28 @@
/* Placed in the public domain. */
/*
* _FORTIFY_SOURCE includes a misguided check for FD_SET(n)/FD_ISSET(b)
* where n > FD_SETSIZE. This breaks OpenSSH and other programs that
* explicitly allocate fd_sets. To avoid this, we wrap FD_SET in a
* function compiled without _FORTIFY_SOURCE.
*/
#include "config.h"
#if defined(HAVE_FEATURES_H) && defined(_FORTIFY_SOURCE)
# include <features.h>
# if defined(__GNU_LIBRARY__) && defined(__GLIBC_PREREQ)
# if __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0)
# undef _FORTIFY_SOURCE
# undef __USE_FORTIFY_LEVEL
# include <sys/socket.h>
void kludge_FD_SET(int n, fd_set *set) {
FD_SET(n, set);
}
int kludge_FD_ISSET(int n, fd_set *set) {
return FD_ISSET(n, set);
}
# endif /* __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) */
# endif /* __GNU_LIBRARY__ && __GLIBC_PREREQ */
#endif /* HAVE_FEATURES_H && _FORTIFY_SOURCE */

18
openbsd-compat/openbsd-compat.h
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@ -1,4 +1,4 @@
/* $Id: openbsd-compat.h,v 1.61 2014/02/04 00:18:23 djm Exp $ */
/* $Id: openbsd-compat.h,v 1.62 2014/09/30 23:43:08 djm Exp $ */
/*
* Copyright (c) 1999-2003 Damien Miller. All rights reserved.
@ -268,4 +268,20 @@ char *shadow_pw(struct passwd *pw);
#include "port-tun.h"
#include "port-uw.h"
/* _FORTIFY_SOURCE breaks FD_ISSET(n)/FD_SET(n) for n > FD_SETSIZE. Avoid. */
#if defined(HAVE_FEATURES_H) && defined(_FORTIFY_SOURCE)
# include <features.h>
# if defined(__GNU_LIBRARY__) && defined(__GLIBC_PREREQ)
# if __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0)
# include <sys/socket.h> /* Ensure include guard is defined */
# undef FD_SET
# undef FD_ISSET
# define FD_SET(n, set) kludge_FD_SET(n, set)
# define FD_ISSET(n, set) kludge_FD_ISSET(n, set)
void kludge_FD_SET(int, fd_set *);
int kludge_FD_ISSET(int, fd_set *);
# endif /* __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) */
# endif /* __GNU_LIBRARY__ && __GLIBC_PREREQ */
#endif /* HAVE_FEATURES_H && _FORTIFY_SOURCE */
#endif /* _OPENBSD_COMPAT_H */