linux-kernel - [PATCH] Fix ld-version.sh to handle large 3rd version part

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-next>] [day] [month] [year] [list]

Message-ID: <1451170072-22846-1-git-send-email-james.hogan@imgtec.com>
Date:	Sat, 26 Dec 2015 22:47:52 +0000
From:	James Hogan <james.hogan@...tec.com>
To:	Ralf Baechle <ralf@...ux-mips.org>
CC:	<linux-kernel@...r.kernel.org>,
	James Hogan <james.hogan@...tec.com>,
	"Andi Kleen" <ak@...ux.intel.com>, Michal Marek <mmarek@...e.cz>,
	Guenter Roeck <linux@...ck-us.net>, <linux-mips@...ux-mips.org>
Subject: [PATCH] Fix ld-version.sh to handle large 3rd version part

The ld-version.sh script doesn't handle versions with large (>= 10) 3rd
version components, because the 2nd component is only multiplied by 10
times that of the 3rd component.

For example the following version string:
GNU ld (Codescape GNU Tools 2015.06-05 for MIPS MTI Linux) 2.24.90

gives a bogus version number:
 20000000
+ 2400000
+  900000 = 23300000

Breakage, confusion and mole-whacking ensues.

Increase the multipliers of the first two version components by a factor
of 10 to give space for a 3rd components of up to 99, and update the
sole user of ld-ifversion (MIPS VDSO) accordingly.

Signed-off-by: James Hogan <james.hogan@...tec.com>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Michal Marek <mmarek@...e.cz>
Cc: Guenter Roeck <linux@...ck-us.net>
Cc: linux-mips@...ux-mips.org
---
This is based on top of mips-for-linux-next with Guenter's patch "MIPS:
VDSO: Fix build error with binutils 2.24 and earlier" applied first.

Ralf: Please consider applying to hopefully fix the VDSO build issue
once and for all.

Andi/Michal: If this patch gets merged, I'm guessing the patch "Kbuild,
lto: Add Link Time Optimization support v3" will need tweaking when it
gets merged.
---
 arch/mips/vdso/Makefile | 2 +-
 scripts/ld-version.sh   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile
index 14568900fc1d..ee3617c0c5e2 100644
--- a/arch/mips/vdso/Makefile
+++ b/arch/mips/vdso/Makefile
@@ -26,7 +26,7 @@ aflags-vdso := $(ccflags-vdso) \
 # the comments on that file.
 #
 ifndef CONFIG_CPU_MIPSR6
-  ifeq ($(call ld-ifversion, -lt, 22500000, y),y)
+  ifeq ($(call ld-ifversion, -lt, 225000000, y),y)
     $(warning MIPS VDSO requires binutils >= 2.25)
     obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
     ccflags-vdso += -DDISABLE_MIPS_VDSO
diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh
index 198580d245e0..0b67edc5bc6f 100755
--- a/scripts/ld-version.sh
+++ b/scripts/ld-version.sh
@@ -3,6 +3,6 @@
 	{
 	gsub(".*)", "");
 	split($1,a, ".");
-	print a[1]*10000000 + a[2]*100000 + a[3]*10000 + a[4]*100 + a[5];
+	print a[1]*100000000 + a[2]*1000000 + a[3]*10000 + a[4]*100 + a[5];
 	exit
 	}
-- 
2.4.10

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/