[Bug 1906250] Comment bridged from LTC Bugzilla
--- Comment From heinz-werner_se...@de.ibm.com 2021-04-08 06:13 EDT--- Already verified on groovy by IBM -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906250 Title: Segmentation fault in s390x ld.so while parsing /etc/ld.so.cache using qemu-s390x on x86_64. To manage notifications about this bug go to: https://bugs.launchpad.net/glibc/+bug/1906250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906250] Comment bridged from LTC Bugzilla
--- Comment From heinz-werner_se...@de.ibm.com 2021-02-11 03:36 EDT--- IBM Bugzilla status->closed, Fix Released with all requested distros -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906250 Title: Segmentation fault in s390x ld.so while parsing /etc/ld.so.cache using qemu-s390x on x86_64. To manage notifications about this bug go to: https://bugs.launchpad.net/glibc/+bug/1906250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906250] Comment bridged from LTC Bugzilla
--- Comment From s...@de.ibm.com 2021-01-21 05:06 EDT---
You are right, I've just successfully run a small helloworld on groovy:
qemu-s390x -L /usr/s390x-linux-gnu ./helloworld-s390x
Hello world
I've used these packages:
libc-bin/groovy-proposed,now 2.32-0ubuntu3.1 amd64 [installed,automatic]
libc6/groovy-proposed,now 2.32-0ubuntu3.1 amd64 [installed,automatic]
libc6-s390x-cross/groovy,now 2.32-0ubuntu3cross2 all [installed]
As far as I understand, this libc6-s390x-cross package is based on older
libc6-2.32-0ubuntu3 package.
Note that the used libc6-package writes the endianess marker to
ld.so.cache. But the libc6-s390x-cross does not check for this endianess
marker (the patch git-elf-Add-endianness-markup-to-ld.so.cache-
bug-27008.patch was added with newer libc6-2.32-0ubuntu3.1 package)!
But as glibc-2.32 is used, there is the enhanced corruption check. This time, I
haven't debugged it, but I assume that this is the reason, why the helloworld
works on groovy):
if (file != MAP_FAILED && cachesize > sizeof *cache_new
&& memcmp (file, CACHEMAGIC_VERSION_NEW,
sizeof CACHEMAGIC_VERSION_NEW - 1) == 0
/* Check for corruption, avoiding overflow. */
&& ((cachesize - sizeof *cache_new) / sizeof (struct file_entry_new)
>= ((struct cache_file_new *) file)->nlibs))
{
Note that the focal libc6/libc6-s390x-cross packages both have the endianess
marker patch, but are missing this corruption check. See my previous comment
with
### Missing the "Check for corruption, avoiding overflow." here. ###
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Title:
Segmentation fault in s390x ld.so while parsing /etc/ld.so.cache using
qemu-s390x on x86_64.
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[Bug 1906250] Comment bridged from LTC Bugzilla
--- Comment From s...@de.ibm.com 2021-01-13 10:19 EDT--- I've just installed libc-bin/groovy-proposed,now 2.32-0ubuntu3.1 amd64 [installed,automatic] libc6/groovy-proposed,now 2.32-0ubuntu3.1 amd64 [installed,automatic] and /etc/ld.so.cache contains the flags = cache_file_new_flags_endian_little = 2. Which libc6-s390x-cross groovy package version is based on libc6-2.32-0ubuntu3.1 ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906250 Title: Segmentation fault in s390x ld.so while parsing /etc/ld.so.cache using qemu-s390x on x86_64. To manage notifications about this bug go to: https://bugs.launchpad.net/glibc/+bug/1906250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906250] Comment bridged from LTC Bugzilla
--- Comment From s...@de.ibm.com 2021-01-12 05:22 EDT--- (In reply to comment #13) > Yes this is a different fix in Focal, but it fixes the actual endianness > problem rather than improving the corruption check. In my testing that > resolved the reported issue, please give a try to the newly build cross > packages. I've just updated to these packages: libc-bin/focal-proposed,now 2.31-0ubuntu9.2 amd64 [installed,automatic] libc6/focal-proposed,now 2.31-0ubuntu9.2 amd64 [installed,automatic] libc6-s390x-cross/focal-proposed,focal-proposed,now 2.31-0ubuntu9.2cross1 all [installed] And checked that ldconfig has written /etc/ld.so.cache with flags = cache_file_new_flags_endian_little = 2. And successfully run a s390x binary: $ qemu-s390x -L /usr/s390x-linux-gnu ./helloworld-s390x Hello world Thanks. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906250 Title: Segmentation fault in s390x ld.so while parsing /etc/ld.so.cache using qemu-s390x on x86_64. To manage notifications about this bug go to: https://bugs.launchpad.net/glibc/+bug/1906250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906250] Comment bridged from LTC Bugzilla
--- Comment From s...@de.ibm.com 2020-12-17 09:42 EDT---
The build of the cross-packages is not finished yet:
https://launchpad.net/ubuntu/+source/cross-toolchain-base/43ubuntu3.1
See "Builds"
Focal: (Icon: currently building) amd64
But I had a look into glibc 2.31-0ubuntu9.2 source package
and recognized Florians patch:
debian/ubuntu/git-elf-Add-endianness-markup-to-ld.so.cache-bug-27008.patch
But compared to upstream, elf/dl-cache.c:_dl_load_cache_lookup():
if (file != MAP_FAILED && cachesize > sizeof *cache_new
&& memcmp (file, CACHEMAGIC_VERSION_NEW,
sizeof CACHEMAGIC_VERSION_NEW - 1) == 0)
### Missing the "Check for corruption, avoiding overflow." here. ###
{
if (! cache_file_new_matches_endian (file))
{
This check was introduced in a different patch. See my former comment:
On glibc upstream > glibc-2.31 && < glibc-2.32,
there is the following commit which adds a further check for corruption,
avoiding overflow:
"ld.so: Check for new cache format first and enhance corruption check"
https://sourceware.org/git/?p=glibc.git;a=commit;h=e221c512c74ec42fd47b71de2981a475b38110a4
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https://bugs.launchpad.net/bugs/1906250
Title:
Segmentation fault in s390x ld.so while parsing /etc/ld.so.cache using
qemu-s390x on x86_64.
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