** Description changed: [Impact] - * A bad return in handling uretprobe makes qemu tcg to crash the probed - application. + * A bad return in handling uretprobe makes qemu tcg to crash the probed + application. - * Fix is small and upstream, backport as SRU to fix it in active releases - as well + * Fix is small and upstream, backport as SRU to fix it in active releases + as well [Test Plan] - * See + * See https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1929926/comments/8 [Where problems could occur] - * Changes are limited to s390x TCG, so that is the kind of use cases to - look out for potential issues as well. + * Changes are limited to s390x TCG, so that is the kind of use cases to + look out for potential issues as well. [Other Info] - - * TODO: we need to clarify the importance of this before fully entering - SRU + + * This bug on its own isn't important enough to cause everyone to + download a new qemu. But we now have another bug to bundle it with, + and users as well as the bug reporter are mostly interested in the + LTS. OTOH we need this fix here for F+H but the other one only for F. + Therefore intention is to hold it back for Hirsute via block-proposed + while fully completing Focal. ------------ - --Problem Description--- Using an uretprobe in QEMU without hardware acceleration causes a SIGSEGV. ---uname output--- na Machine Type = na ---Debugger--- A debugger is not configured ---Steps to Reproduce--- Run attach_probe eBPF testcase in QEMU. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/testing/selftests/bpf/prog_tests/attach_probe.c?h=v5.12#n73 Userspace tool common name: na The userspace tool has the following bit modes: 64-bit Userspace rpm: na Userspace tool obtained from project website: na Fix: https://git.qemu.org/?p=qemu.git;a=commit;h=86131c71b13257e095d8c4f4453d52cbc6553c07 Package qemu focal (20.04LTS) 1:4.2-3ubuntu6.14 groovy (20.10) 1:5.0-5ubuntu9.6 hirsute (21.04) 1:5.2+dfsg-9ubuntu2 impish (metapackages): 1:5.2+dfsg-9ubuntu3 It would be good to have this fix in 20.04 and the later ones. The patch applies cleanly to all levels.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1929926 Title: [UBUNTU 21.10] qemu: target/s390x: Fix translation exception on illegal instruction To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1929926/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
