Hi,
I am also affected by this problem. It is an overflow check
using undefined behavior in an overflow check in test.c
that looks like "if (pe + SPINSZ > pe && pe != 0)"
but with >4G memory pe + SIINSZ wraps around.
I think the most simple fix would be the following:
2020-12-15 Bernd Edlinger <bernd.edlin...@hotmail.de>
* Makefile: Use -fwrapv-pointer for test.c.
diff -u memtest86+-5.01.orig/Makefile memtest86+-5.01/Makefile
--- memtest86+-5.01.orig/Makefile 2020-12-15 06:50:42.000000000 +0100
+++ memtest86+-5.01/Makefile 2020-12-15 06:54:08.941390803 +0100
@@ -58,7 +58,8 @@
$(CC) -c $(CFLAGS) -fno-strict-aliasing reloc.c
test.o: test.c
- $(CC) -c -Wall -march=i486 -m32 -O0 -fomit-frame-pointer -fno-builtin
-ffreestanding test.c
+ $(CC) -c -Wall -march=i486 -m32 -O0 -fomit-frame-pointer -fno-builtin \
+ -ffreestanding -fwrapv-pointer test.c
random.o: random.c
$(CC) -c -Wall -march=i486 -m32 -O3 -fomit-frame-pointer -fno-builtin
-ffreestanding random.c
** Patch added: "bug-fix for >4G memory"
https://bugs.launchpad.net/ubuntu/+source/memtest86+/+bug/1876157/+attachment/5443714/+files/memtest.diff
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1876157
Title:
Memtest86+ in Ubuntu 20.04 doesn't work, switch to Coreboot branch or
package new release v5.31b is available since 12/04/2020
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/memtest86+/+bug/1876157/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
