linux-kernel - [PATCH 4/7] tools/nolibc: remove __nolibc_enosys() fallback from fork functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250821-nolibc-enosys-v1-4-4b63f2caaa89@weissschuh.net>
Date: Thu, 21 Aug 2025 17:40:35 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Willy Tarreau <w@....eu>, Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, Shuah Khan <shuah@...nel.org>
Cc: Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-kselftest@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 4/7] tools/nolibc: remove __nolibc_enosys() fallback from
 fork functions

All architectures have one of the real functions available.
The additional fallback to __nolibc_enosys() is superfluous.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 tools/include/nolibc/sys.h | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index 9c4fa7efc1d606f18a5a92b0a3dd9ad7b9b4521b..fc3c8a3d02e9a031aad2229a430c232eb60065b1 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -321,10 +321,8 @@ pid_t sys_fork(void)
 	 * will not use the rest with no other flag.
 	 */
 	return my_syscall5(__NR_clone, SIGCHLD, 0, 0, 0, 0);
-#elif defined(__NR_fork)
-	return my_syscall0(__NR_fork);
 #else
-	return __nolibc_enosys(__func__);
+	return my_syscall0(__NR_fork);
 #endif
 }
 #endif
@@ -341,7 +339,7 @@ pid_t sys_vfork(void)
 {
 #if defined(__NR_vfork)
 	return my_syscall0(__NR_vfork);
-#elif defined(__NR_clone3)
+#else
 	/*
 	 * clone() could be used but has different argument orders per
 	 * architecture.
@@ -352,8 +350,6 @@ pid_t sys_vfork(void)
 	};
 
 	return my_syscall2(__NR_clone3, &args, sizeof(args));
-#else
-	return __nolibc_enosys(__func__);
 #endif
 }
 #endif

-- 
2.50.1