** Description changed:
- QEMU user-mode emulation fails to load s390x BusyBox on a ppc64el host:
-
- /bin/busybox: error while loading shared libraries:
- libresolv.so.2: failed to map segment from shared object
+ QEMU user-mode emulation fails to load s390x BusyBox on a ppc64el host:
- s390x uses 4 KiB guest pages; Ubuntu ppc64el hosts normally use
+ /bin/busybox: error while loading shared libraries:
+ libresolv.so.2: failed to map segment from shared object
+
+ s390x uses 4 KiB guest pages; Ubuntu ppc64el hosts normally use
64 KiB pages.
- The guest ELF layout satisfies its 4 KiB alignment requirements. The
- suspected defect is in QEMU's translation of valid guest mappings to
- larger host pages, rather than in the guest library layout.
+ The guest ELF layout satisfies its 4 KiB alignment requirements. The
+ suspected defect is in QEMU's translation of valid guest mappings to
+ larger host pages, rather than in the guest library layout.
On Resolute,
- The regression first appeared after updating s390x glibc from
- 2.43-2ubuntu2 to 2.43-2ubuntu2.3, without changing QEMU, BusyBox, or
+ The regression first appeared after updating s390x glibc from
+ 2.43-2ubuntu2 to 2.43-2ubuntu2.3, without changing QEMU, BusyBox, or
the host kernel.
[Test Plan]
- 1. On a ppc64el host, record getconf PAGESIZE, uname -a, and
- qemu-s390x --version. Confirm a 65,536-byte host page size.
+ 1. On a ppc64el host, record getconf PAGESIZE, uname -a, and
+ qemu-s390x --version. Confirm a 65,536-byte host page size.
2. Install qemu-user
$ apt install -y qemu-user
3. Install busybox package for s390x
$ dpkg --add-architecture s390x
+ $ apt update
$ apt-get install --no-install-recommends -q -y busybox:s390x
4. Run s390x busybox binary with qemu-user
-
- /usr/bin/qemu-s390x /bin/busybox ash -c '/usr/bin/qemu-s390x /bin/busybox ls
-dCFl debian/*[t]*'
+
+ /usr/bin/qemu-s390x /bin/busybox ash -c '/usr/bin/qemu-s390x
+ /bin/busybox ls -dCFl debian/*[t]*'
Should give error:
/bin/busybox: error while loading shared libraries: libresolv.so.2:
failed to map segment from shared object
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https://bugs.launchpad.net/bugs/2170563
Title:
qemu-user: s390x library loading fails on 64 KiB-page ppc64el hosts
when a mapping fragment overlaps a file-backed page beyond EOF
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