Public bug reported: SRU Justification
Impact: On s390, an incorrect pointer being copied from the kernel to userspace breaks stack unwinding. Fix: One-line change from upstream. Only needed for 4.15+. Test Case: The glibc testsuite contains test cases, which currently fail with 4.15. Regression Potential: Minimal as this is a small, obvious bug fix for a single architecture. --- As pointed out in the glibc bug[1], there's a kernel bug preventing unwinding due to an incorrect pointer being copied to userspace. A 1-line patch[2] has been committed to Linus's tree to fix this. I investigated, and this only affects 4.15, so we only need this applied to bionic. [1] https://sourceware.org/bugzilla/show_bug.cgi?id=22916 [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8b09ca746a643ca452cd41a522046a96ee5a55fd ** Affects: linux (Ubuntu) Importance: High Assignee: Seth Forshee (sforshee) Status: In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1765083 Title: Please cherrypick s390 unwind fix Status in linux package in Ubuntu: In Progress Bug description: SRU Justification Impact: On s390, an incorrect pointer being copied from the kernel to userspace breaks stack unwinding. Fix: One-line change from upstream. Only needed for 4.15+. Test Case: The glibc testsuite contains test cases, which currently fail with 4.15. Regression Potential: Minimal as this is a small, obvious bug fix for a single architecture. --- As pointed out in the glibc bug[1], there's a kernel bug preventing unwinding due to an incorrect pointer being copied to userspace. A 1-line patch[2] has been committed to Linus's tree to fix this. I investigated, and this only affects 4.15, so we only need this applied to bionic. [1] https://sourceware.org/bugzilla/show_bug.cgi?id=22916 [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8b09ca746a643ca452cd41a522046a96ee5a55fd To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1765083/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
